2Q 2010 www.ti.com/led LED Reference Design Cookbook
LED Reference Design Cookbook TexasInstruments2Q2010
LED Reference Design Cookbook
Table of Contents
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ArticleLED
ConfigurationDimming Options VIN VOUT (VDC) IOUT (mA) Device Page
LED Drivers
TRIAC Dimmable LED Lighting Reference Design 3 to 5 series TRIAC 120 and 230 V 14 to 17 V 325 TPS92010 4
10-Watt, AC/DC LED Driver 3 to 6 series — 120 to 290 VAC 24 typical 350 TPS92010 6
Dimmable LED Lighting Driver for Lightbulb Retrofit Apps 9 to 11 series TRIAC 90 to 265 V 28 V 350 TPS92210 8
Low-Cost AC/DC TRIAC Dimmable Driver Replacement for Lightbulb
7 to 9 series TRIAC dimmer 90 to 130 VAC 24 to 32 450 TPS92001 10
110-Watt, Constant-Current, Isolated Driver with PFC 7 to 15 series (up to 4 strings)
Analog or PWM 90 to 265 VAC 22 to 60 500 UCC28810 12
100-Watt, Constant-Current, Non-Isolated Driver with PFC 15 to 30 series PWM 90 to 265 VAC 55 to 100 900 UCC28810 14
240-W LED Lighting System 6 series PWM 108 to 305 VAC 70 to 85 3000 TPS92020UCC28810UCC28811
16
Constant Current Driver with PFC 3 to 13 series — 180 to 265 VAC 10 to 48.5 700 UCC28810 18
LED Streetlight Driver Based on SEPIC Topology 80 series TRIAC dimmer 150 to 264 VAC 300 max 350 UCC28810 20
25-Watt Dimmable Driver with PFC 10 series TRIAC dimmer 85 to 305 VAC 33 to 38 700 UCC28810 24
Nonsynchronous Boost LED Driver 10 series (1 or 2 strings)
— 9 to 18 VDC 40 max 700 or 350 TPS40211 26
Wide-Input DC Voltage Range SEPIC Driver 4 series — 8 to 40 VDC 13 typical 350 TPS40211 28
Article Standard Description TI Devices Page
Lighting Communications and Control
TMS320C2000™ Power-Line-Communcations Modem Eval Kit
EN50065 IEC 6100-3 OFDM and S-FSK PLC Modem Kit TMS320C2000™OPA564PGA112
30
Digital Addressable Lighting Interface (DALI) DALI DALI Reference Design Using MSP30™ MCU MSP430™ MCU 32
ArticleLED
ConfigurationDimming Options VIN VOUT (VDC) IOUT (mA) Device Page
LED Drivers
DC/DC LED Developer’s Kit 8 strings (1-10 LEDs per string)
PWM 12 to 24 VDC 12 to 40 V 8X 1A Piccolo™ MCU
33
3-Watt Solar Lantern 3 series Analog or PWM 4.5 to 7.4 VDC 10.5 typical 350 TPS61165 34
High-Brightness LED Driver with Switch Control 9 to 11 series Linear 4.5 to 42 VDC 42 max 500 TL4242 36
High-Brightness LED Driver with Single-Clock Operation 8 parallel (up to 8 strings)
Pending 3.0 to 5.5 VDC 2.0 to 17.0 V 120 per channel
TLC5917 38
Wireless-Controlled Triple LED Driver 3 parallel (tricolor) — 4.5 to 5.5 VDC 3 typical 300 per LED TPS62260 40
Low-Voltage Buck Boost for LED Torch 1 Dual level 1.2 to 5 VDC 5 typical 600 TPS63000 42
Boost Driver with Integrated Power Switch 4 to 8 series Analog or PWM 5 to 12 VDC VIN to 38 2000 max TPS61500 44
1.5-A White LED Driver for Notebooks Up to 10 per channel
(up to 6 channels)
PWM 5 to 24 VDC VIN to 38 Six 25-mA current sinks
TPS61180TPS61181TPS61182
46
Multichannel PWM Power Driver for Power LED Applications
4 strings (15 series each)
Digital or PWM 2 to 50 0 to 49.5 2500 max DRV9812 48
Small LCD Backlight with Digital and PWM Dimming 10 series Digital or PWM 3 to 18 VDC 26 or 38 max
700 max TPS61160/1 50
Small LCD Backlight from LDO 4 parallel (2 banks of 2)
— 2.5 to 5.5 VDC 3 typical 25 per LED TPS7510x 52
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LED Reference Design Cookbook 3
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TexasInstruments2Q2010 LED Reference Design Cookbook
LED Reference Design CookbookHelpingYouSolveYourLightingDesignChallenges
TheLEDReferenceDesignCookbookisdesignedtoprovideyouwithavaluabletooltohelpyousolveyourlightingdesignneeds.CustomersseekingthelatestininnovativeandaffordableLEDlightingsolutionscanbenefitfromTI’sbroadproductportfolioofAC/DC,DC/DC,LEDdrivers,powermanagementdevices,wirelessandwiredinterfacecontrolandembeddedprocessors.
Designershavetheoptionofnotonlycontrollingthepowerstage,butregulatingLEDcurrentsaswell,eliminatingtheneedformultiplecomponentsandreducingsystemcost.Systemscanbedesignedtoaccuratelycontrolvoltageandcurrentregulationforpreciselightintensityandcolormixing,temperaturemonitoringtopreventthermalrunaway,intelligent/adaptivedimming,andfaultdetection(overvoltage/current,blownstring).Communicationwithexternalsystemsisalsopossibleviapower-linecommunication(PLC),wirelesstechnologyorinterfaces.
LEDlightingdesignersarechallengedwithmeetingtheirefficiencyandreliabilitygoalsfasterinadvancedlightingdesigns.TI’slightingportfolioishelpingdesignersachievetheirgoalsatafasterrate.
ToseetheTIsolutionsforgenerallighting,signage,backlightingandautomotive,allcomplimentedbyacomprehensivecustomersupportnetwork,visit:
TI has Solutions for Your Lighting Challenges:• Precisionchannel-to-channeland
chip-to-chipaccuracytocreatethebesthueandluminanceinyourRGBmessageboardsandvideodisplays
• Smallfootprint,highestefficiency,programmableLEDorOLEDbacklightcontrollers
• Blinkinglow-powerLEDstoactasindicatorsinanautomotivedisplayorinacasinogame
• ControllerstopoweranddimhighbrightnesswhiteorRGBLEDsforarchitecturalluminariesandportablelighting
• PoweringarraysofHBLEDsoffanACsourceforuseinstreetlightingandreplacinghigh-intensitydischarge(HID)lamps
• HighlyintegratedZigBee®transceiversandSoCsolutionsforwirelesslightingcontrolandhomeautomation
ArticleLED
ConfigurationDimming Options VIN VOUT (VDC) IOUT (mA) Device Page
LED Drivers
Medium-Size LCD Backlight 3 series Digital or PWM 3 to 12 VDC 5 typical 820 max TPS61165 54
Large-LCD Backlight Driver Up to 96(12 series, 8
strings)
Analog or PWM 4 to 24 VDC 16 to 48 320 TPS61195 56
24-Channel, 12-Bit PWM LED Driver 24 parallel Digital or PWM 3.0 to 5.5 VDC 2.0 to 17.0 V 40 per channel TLC5951 58
24-Channel, Constant-Current LED Driver with Global Brightness Control
24 parallel Digital 3.0 to 5.5 VDC 2.0 to 17.0 V 35 per channel TLC5952 60
16-Channel LED Driver with Load-Switch Dimming Control 16 parallel PWM or Analog 3.0 to 5.5 VDC 17 max 100 per channel
TLC59116 62
www.ti.com/led
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LED Reference Design Cookbook TexasInstruments2Q2010
TRIAC Dimmable LED Lighting Reference Design
TPS92010
TRIAC Dimmable LED Lighting Reference Design
TPS92010
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Description ThisdesignusestheTPS920108-pin,high-efficiencyoff-lineLEDlightingcontroller.Thiscontrollerincorporatesmanyfeatures,suchasfrequencyfold-backandalow-powermode,toimplementalow-cost,high-efficiencyflybackconverter.
AnapplicationofthisconverterisretrofittinglightbulbswithLEDs.Theconvertercandrive3to5high-brightnessLEDsinserieswithaconstantcurrentof0.35A.
Theflybacktopologyischosenbecauseitallowsalowercomponentcountandlowercostthanother
Efficiency without Dimmer
Dimming Performance
Output Current Regulation
Key Features• AC/DCTRIACdimmableLED
referencedesign• Idealforresidentiallighting• 3-to12-Wapplications• Highefficiency• TIlosslessdimmingcircuitfora
cooler,lower-powersystemduringdeepdimming
Web LinksDatasheets, user’s guides, samples:www.ti.com/sc/device/TPS92010
Efficiency with Dimmer
topologies.LEDcurrentissenseddirectlytoensureitstightregulation.AspecialcircuitforcompatibilitywithTRIACdimmersadjuststheoutputcurrentlinearly,avoidinganystroboscopiceffectsoraudiblenoisethatmightotherwiseoccur.TheTPS92010isdesignedforlow-powerlightingapplicationsthatdonotrequirepower-factorcorrection.
Design Specifications
Parameter Minimum Typical Maximum
Input voltage (VAC) 100 120 130
Output voltage (VDC) 9 — 18
Output current (A) — 0.35 —
Efficiency (%) — 80 —
Adjusting the Output Current
Output Current(A)
R15(W)
R17(W)
R1(W)
R42(W)
0.20 1000 150 330 1000
0.225 1200 86 390 1000
0.25 1200 220 470 1000
0.275 1000 560 680 680
0.30 1500 220 680 680
0.325 1500 330 470 1500
0.35 1000 1000 820 1000
0.40 1800 470 1000 1000
0.45 2200 390 1500 1000
0.50 2700 220 1500 1000
0.60 3300 150 1500 1500
0.70 3900 270 2200 1500
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TexasInstruments2Q2010 LED Reference Design Cookbook
TRIAC Dimmable LED Lighting Reference Design
TPS92010
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TRIAC Dimmable LED Lighting Reference Design
TPS92010
Design Specifications
Parameter Minimum Typical Maximum
Input voltage (VAC) 100 120 130
Output voltage (VDC) 9 — 18
Output current (A) — 0.35 —
Efficiency (%) — 80 —
Adjusting the Output Current
Output Current(A)
R15(W)
R17(W)
R1(W)
R42(W)
0.20 1000 150 330 1000
0.225 1200 86 390 1000
0.25 1200 220 470 1000
0.275 1000 560 680 680
0.30 1500 220 680 680
0.325 1500 330 470 1500
0.35 1000 1000 820 1000
0.40 1800 470 1000 1000
0.45 2200 390 1500 1000
0.50 2700 220 1500 1000
0.60 3300 150 1500 1500
0.70 3900 270 2200 1500
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LED Reference Design Cookbook TexasInstruments2Q2010
10-Watt, AC/DC LED Driver
TPS92010 PMP3522
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Description ThePMP3522isareferencedesignthatutilizestheTPS92010highefficiencyLEDlightingdrivercontroller.
Residentialdownlightinghasseenagreatdealoftransitiontomoreefficientsourcesoflight.CompactCFLshavebecomeamainstayinresidentiallighting,butasthelifetimecostofLEDlampsfalls,allthemorelow-power,small-form-factordesignswillbeneeded.Thisreferencedesignisanunder-10-W,non-isolatedSEPICLEDdriverspecificallylaidoutforresidentialdownlighting.
Web LinksDatasheets, user’s guides, samples:www.ti.com/sc/device/TPS92010
PMP3522 Schematic
Design Specifications
Parameter Minimum Typical Maximum Unit
Input voltage 120 — 290 VAC
Output voltage — — 24 Volts
Output current — 0.350 — Amp
TPS92010
C101nF
C20.1µF
C510µF
C60.1µF
D2BZX84C20T
C10.047µF275VAC
R8
10
R7100K
Q1FCD4N60
L3180µH
J2
R90.1
R126.11K
R133.3
R143.3
3 - 6 LEDs @ 350mALET RTN
R11100
C7
0.1µF
R10100 Q2
MMBT3904LT1
R4100
R3220K
R2220K
R1220K
TP2
D6BAT54S
D3MMBD4148
C9470µF
C1110µF
D4MURA160T3
D5BZX84C27T
R1533.2K
C31nF
C447nF
LPMVSDVDD
GD
1
2
3
4
1
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AC
8
7
6
5
1 2
2
1
3 4
SSFBPCSGND
L11mH
F10.5A
D1RH05-T
AC IN120 - 290VAC
J1
L21mH +
+
+
+ +
Key Features• Single-stageSEPIC,PFC+LED
currentregulation• Low-cost,low-componentcount• Drives3to6LEDsat350mA
Formorereferencedesigns,see:www.ti.com/powerreferencedesigns
TexasInstruments2Q2010 LED Reference Design Cookbook
10-Watt, AC/DC LED Driver
TPS92010 PMP3522
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10-Watt, AC/DC LED Driver
TPS92010 PMP3522Laid Out for Bulb Replacement
Regulation
Efficiency
Control Loop Frequency
LED Reference Design Cookbook TexasInstruments2Q2010
Dimmable LED Lighting Driver for Lightbulb Retrofit Apps
TPS92210EVM
Dimmable LED Lighting Driver for Lightbulb Retrofit Apps
TPS92210EVM
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Description TheTPS92210EVMisanaturalpower-factor-correction(PFC)LEDlightingdrivercontrollerwithadvancedenergyfeaturestoprovidehigh-efficiencycontrolforLEDlightingapplications.TheTPS92210EVMiscapableofprovidingahighpowerfactor,TRIACdimming,loadprotectionandextendedlifeinasmallspaceatlowcost.
TheTPS92210EVMemploysquasiconstant“on”timethatenablessingle-stagePFCinanisolatedflybackconfiguration.Intendedfor
Key Features• AC/DCTRIACdimmableLEDdriver
withPFC• Idealforresidentiallighting• Singlestage(PFCandLED
currentregulation)• 12-to25-Wapplications• DeepTRIACdimmingcapability
Web Linkswww.ti.com/tps92210evm
TPS92210EVM Block Diagram
low-powerlightingapplications,itcanbepackagedinavarietyofways,includingindividuallampdesignsandgenericPCBformfactorsformanytypesoflighting.Thedriverpreservesdimmerholdingcurrentandfeaturesdual-slopeoutputcontroltoimprovedimminglinearitywhenusedwithcommonTRIAC-basedphase-controldimmers.TheTPS92210controllerisprogrammedtooperateatafixedfrequencywithaconstant“on”timefortheinternalswitchthatdrivestheprimarypowerFET.
VDD
OOP
CGD
CSD
FB
OTM
PCM
GND
FEEDBACK
C
RCS
Primary Secondary
1
4
3
7
8
2
8
5
Phase AngleDetection
SupplementalLoad
Current Referenceand
Difference Amplifier
TPS92210
Description Parts VIN RangeVOUT (DC)
RangeNumber of LEDs
IOUT(max)
POUT(max) Eff. PFC ISO
Dimming In
Dimming Out
TPS92210EVMHigh efficiency, PFC and TRIAC dimmable LED lighting driver
TPS92210 180 V 265 V 17 V 21 V 6 350 mA 11 W 83% Yes Yes TRIAC Linear
Formorereferencedesigns,see:www.ti.com/powerreferencedesigns
NEW!
TexasInstruments2Q2010 LED Reference Design Cookbook
Dimmable LED Lighting Driver for Lightbulb Retrofit Apps
TPS92210EVM
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Dimmable LED Lighting Driver for Lightbulb Retrofit Apps
TPS92210EVMLED Lighting Driver’s Efficiency LED Lighting Driver’s Total Harmonic Distortion
LED Lighting Driver’s PFC
LED Lighting Driver’s Current RippleLED Lighting Driver’s Current Regulation
LED Reference Design Cookbook TexasInstruments2Q2010
Low-Cost AC/DC TRIAC Dimmable Driver for Lightbulb
TPS92001 PMP4981
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Description ThePMP4981isareferencedesignforanLEDdriverinalightbulb-replacementcircuit.ThedesignisoptimizedtofunctionwithACinputsourcesthatmaybefedthroughanindustry-standardTRIAC-basedphase-cutdimmer.
PMP4981 Schematic
Design Specifications
Description Parts
VIN (AC)
Range
VOUT (DC)
RangeNumber of LEDs
IOUT (max)
POUT (max) Eff. PFC ISO
Dimming In
Dimming Out EVM
PMP4885 low- cost offline
TPS92001 90 247 to 9 450 mA 12 W 79% No No TRIAC PWM Paper
LED lighting driver TLC372 130 32
ThePMP4981’sdimmingfunctionallowsthestringofLEDstobedimmedtoverylowlevelswithoutflickeringorstroboscopiceffects.CurrentisdrawnfromtheTRIAConlywhenneeded,providinghighefficiencywithanon-isolateddriverforavery-low-costsolution.Thissinglestageprovideshighreliability,longlifeandhighperformance.
+
U1TPS92001
L2470µ
R230
L11.2mH
+
VDD
R910K
D2MURA120T3
D1MURA120
D412V
D5301V Q2
FQT4N25
Q1FZT757A
R710KTP8
TP1
TP4
TP7
TP2
LED+LED–
R61R81
R121K
R410
R3301KR5
2KC6
100p
C7.01U
C10.01µ
R1028K
C91000P
C1.1µ
R11100K
C8.01µ
C34.7µF
C20.1UC5
1µFR12.10K
C11.01µ
C131.0U
U2:ATLC372CD
VDD
REF
REF
20 VACTRIAC Dimmer
TP3
TP6TP5
C40.047µF
200V
C150.01µF
200V
3
1
1234
8765
56
7
+
–
2
4AC
AC
D3RH04-T
FBSSRT1RT2
REFVDDOUTGND
8
4
1
C121.0µ
D7 15V
D615V
R1940.2K
R1640.2K
R15200KR17
560
Q3BF720
Q43906
R188.06K
TP9
C141µ
U2:BTLC372CD
Formorereferencedesigns,see:www.ti.com/powerreferencedesigns
Key Features• Low-cost,AC/DCTRIACdimmable
LEDdriverlightingreferencedesign• Idealforresidentiallighting• LEDripplecurrent100%(120Hz)• 6-to11-Wapplications• DeepTRIACdimmingcapability• Noelectrolyticcapacitorsoption
TexasInstruments2Q2010 LED Reference Design Cookbook
Low-Cost AC/DC TRIAC Dimmable Driver for Light
TPS92001 PMP4981
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Low-Cost AC/DC TRIAC Dimmable Driver for Lightbulb
TPS92001 PMP4981Line Current and Voltage – Dimmer at Full Power Position
LED Current and Voltage – Dimmer at Full Power Position Rectified AC (Top) and LED Current (Bottom) — High Conduction Angle
Line Current and Voltage – Dimmer at ~ Half Power Position Rectified AC (Top) and LED Current (Bottom) — Low Conduction Angle
LED Current and Voltage – Dimmer at Half Power Position
LED Reference Design Cookbook TexasInstruments2Q2010
100-Watt, Constant-Current, Non-Isolated Driver with PFC
UCC28810/UCC28810EVM-002
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Description TheUCC28810EVM-002evaluationmodule(EVM)isaconstant-currentnon-isolatedpowersupplyforLEDlightingapplicationsthatrequirehighbrightness,suchasstreet,parkingorarealighting.Thereferencedesignconvertstheuniversalmains(90to265VRMS)toa0.9-Aconstant-currentsourcetodrivea100-WLEDload.
TheUCC28810EVM-002isatwo-stagedesign.Thefirststage,atransition-modecircuitwithPFC,ensuresthatthedesignmeetsvariousstandardssuchastheEN61000-3-2.ThePFCcircuitconvertstheACinputtoaregulatedDCvoltage,whichcanbeconfiguredasaboost-followerPFCorafixedoutputvoltage.Theboost-
Key Features• High-powerAC/DCLEDdriver
withPFC• Idealforstreet,parkingorarea lighting• Universal-input,non-isolateddesign• TightlyregulatedLEDcurrent• PWMdimming,200Hzto1kHz• Highefficiencythroughdimming• Activepower-factorcorrection
Web LinksDatasheets, user’s guides, samples:www.ti.com/sc/device/UCC28810
Reference designs:www.ti.com/powerreferencedesigns
EVM:www.ti.com/ucc28810evm-002
UCC28810EVM-002 Block Diagram
Design Specifications
Description Parts
VIN (AC)
Range
VOUT (DC)
RangeNumber of LEDs
IOUT (max)
POUT (max) Eff. PFC ISO
Dimming In
Dimming Out EVM
UCC28810 EVM002 100-W
UCC28810 90 5515-30 900 mA 100 W 93% Yes No PWM PWM Yes
LED lighting driver UCC28811 265 100
followerPFCtrackstheACinput’speakvoltageforincreasedefficiencyatlow-lineoperation.ThePFC’sDCoutputvoltageisthenregulatedtoafixedvalueintheregionof396VDC.Thesecondstageofthedesignalsousestransitionmodebutisconfiguredasabuckconverter.ItconvertsthePFCoutputvoltagetoafixed0.9-AcurrenttodriveanLEDload.ThesecondstageacceptsPWMdimminginputs(eitherexternallyorfromanonboardcircuit)andappropriatelytogglesitselfonoroff.
PFC Boost
Enable
BiasBias
PFC Output
LED PWMInput
Critical Conduction ModeLow Side Buck Current Source
PrimaryGnd
UCC28810
TZE
VDD
GDRV
ISENSE
GND
EAOUT
VINS
VSENSE
6
2
3
1
5
8
7
4
UCC28811
VDD
GDRV
GND
TZE
VSENSE
EAOUT
VINS
ISENSE
1
2
3
4
8
7
6
5
TexasInstruments2Q2010 LED Reference Design Cookbook
100-Watt, Constant-Current, Non-Isolated Driver with PFC
UCC28810/UCC28810EVM-002
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100-Watt, Constant-Current, Non-Isolated Driver with PFC
UCC28810/UCC28810EVM-002Efficiency and Power Factor vs. Line Voltage
UCC28810EVM-002 transition mode buck PWM response (expanded). Ch1: LED VOUT, Ch2 PWM, Ch3 buck inductor current 500 mA/Div, Ch4 VDS Ch1 and Ch4 Share GND reference.
PWM Dimming Response
UCC28810EVM-002 efficiency and power factor vs. line voltage 30 Cree XRE LED’s at 900 mA. LED current regulation as a function of line voltage.
Line Regulation 30 LEDs at 900 mA, (98 W)
PWM Dimming Waveforms
UCC28810EVM-002 transition mode buck PWM response. Ch1: Buck VIN, Ch2: Buck VDS, Ch3: LED current (0.5 A/Div), Ch4: LED voltage. Ch1 and Ch4 share GND reference.
THD Factor vs. Line Voltage
UCC28810EVM-002 THD vs. line voltage 30 Cree XRE LED’s at 900 mA.
LED Reference Design Cookbook TexasInstruments2Q2010
14
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110-Watt, Constant-Current, Isolated Driver with PFC
UCC28810/UCC28810EVM-003: SimpLEDrive™Description TheUCC28810EVM-003evaluationmodule(EVM)isanoff-lineAC-to-DCLEDcurrentdriverwithPFCforapplicationssuchasstreet,high-bay,andmedium-orlarge-infrastructurelighting.TheUCC28810EVM-003isathree-stageconverterdesignthatdeliversupto110W.Thefirststageisauniversalinputboost-PFCcircuitprovidinga305-to400-VDCoutput.Thesecondstageisalow-sidebuckcircuitprovidingthecontrolledcurrentsource,andthethirdstageisaseriesoftwohalf-bridgeDC/DCtransformersthatprovidesisolationofmultipleLEDstrings.
Thispatent-pendingsolutionprovidesaneasilyscalableandcost-effectivemethodofdrivingmultipleLEDstrings.TheUCC28810EVM-003implements
UCC28810EVM-003 Block Diagram
Design Specifications
Description Parts
VIN (AC)
Range
VOUT (DC)
RangeNumber of LEDs
IOUT (max)
POUT (max) Eff. PFC ISO
Dimming In
Dimming Out EVM
UCC28810 EVM003 100-Wisolated multi-string LED lightingdriver w/multiple transformers
UCC28810
UCC28811
TPS92020
90, 265 22 V, 60 V 4X (7 - 15) 500 mA 110 W 91% Yes Yes PWM PWM Jul-09
single-referencecurrentcontrolanduniversaldimming(viaAMorPWM)forallLEDs.ThereferencedesigneffectivelydrivesalargenumberofLEDsconnectedinseries,butthevoltageontheLEDstringsissafe(low)andisolatedfromtheACline.Themultistringarchitectureismorecost-effectivethananarchitecturewithaconstantvoltageplusabuckstageforeachLEDstring.TheLED-driverarchitectureisreadilyscalabletoveryhighpowerlevels.ExcellentLEDcurrentmatchingbetweenstringsisachievedwiththisarchitecture.TheUCC28810EVM-003achieveshighefficiency(91%),highpowerdensityandahighpowerfactor.Thecontrolstageisasimpleandrobustdesign,andtheEVMprotectsagainstscenarioswithopenandshortLEDstrings.
Key Features• SimpLEDrive™high-power
dimmableAC/DCLEDdriverwithPFC
• Idealforstreet,high-bayorinfrastructurelighting
• IsolatedfromtheACline• Readilyscalabletohigherpower
levels• LEDcurrentmatchingbetween strings•Highefficiencyandpowerdensity•Activepower-factorcorrection
Web LinksReference designs:www.ti.com/powerreferencedesigns
Datasheets, user’s guides, samples:www.ti.com/sc/device/UCC28810
EVM:www.ti.com/ucc28810evm-003
PFC Boost Follower
Enable
+50 - 60V
+50 - 60V+50 - 60V
+50 - 60V
BiasBias
Bias
PFC Output
LED PWMInput
Critical Conduction ModeLow Side Buck Current Source
PrimaryGnd
UCC28810
TZE
VDD
GDRV
ISENSE
GND
EAOUT
VINS
VSENSE
6
2
3
1
5
8
7
4
UCC28811
VDD
GDRV
GND
TZE
VSENSE
EAOUT
VINS
ISENSE
1
2
3
4
8
7
6
5VCC
GD1
GND
GD2
RT
DT
SS
TPS92020
TexasInstruments2Q2010 LED Reference Design Cookbook
15
➔
110-Watt, Constant-Current, Isolated Driver with PFC
UCC28810/UCC28810EVM-003Efficiency vs. Line Voltage
UCC28810EVM-003 IOUT matching vs. line voltage 4 x 15 Cree XRE LED’s at 500 mA.
Ch1: VBUCK+, Ch2: Buck VDS, Ch3: AC line current 1A/Div, Ch4: VBUCK - Ch1 and Ch 4 share GND reference.
Power Factor vs. Line Voltage UCC28810EVM-003 AC Input Current During PWM Dimming
IOUT Matching vs. Line Voltage
UCC28810EVM-003 efficiency vs. line voltage and load 4 x 15 Cree XRE LED’s at 500 mA.
UCC28810EVM-003 power factor vs. line voltage 4 x 15 Cree XRE LED’s at 500 mA.
PFC Boost Follower
Enable
+50 - 60V
+50 - 60V+50 - 60V
+50 - 60V
BiasBias
Bias
PFC Output
LED PWMInput
Critical Conduction ModeLow Side Buck Current Source
PrimaryGnd
UCC28810
TZE
VDD
GDRV
ISENSE
GND
EAOUT
VINS
VSENSE
6
2
3
1
5
8
7
4
UCC28811
VDD
GDRV
GND
TZE
VSENSE
EAOUT
VINS
ISENSE
1
2
3
4
8
7
6
5VCC
GD1
GND
GD2
RT
DT
SS
TPS92020
LED Reference Design Cookbook TexasInstruments2Q2010
240-W LED Lighting System
TPS92020, UCC28810/1
240-W LED Lighting System
TPS92020, UCC28810/1
16
➔
Description ThisreferencedesignusestheUCC28810,UCC28811andTPS92020foranisolated,off-line,240-WLEDdriverforhigh-bayandstreetlightapplications.Thedriverhasthreestages:apower-factor-correction(PFC)stage,abuckstageandanisolationstage.ThePFCandbuckstagesbothoperateincritical-conductionmode.Theisolationstageisahalf-bridgeconverterwithanoptiontoadoptamulti-transformerconfiguration.Aconstantoutputcurrentiscontrolledwithinthebuckstagetoprovide3AtotheLEDstrings,withanoutputvoltagerangingfrom70Vto85V.
TPS92020, UCC28810/1 Schematic
Web LinksDatasheets, user’s guides, samples:www.ti.com/sc/device/TPS92020,www.ti.com/sc/device/UCC28810 orwww.ti.com/sc/device/UCC28811
Formorereferencedesigns,see:www.ti.com/powerreferencedesigns
Design Specifications
Parameter Test Conditions Minimum Typical Maximum Unit
Input voltage — 108 120/277 305 VRMS
Power factor — 0.990 — — —
Output current — — 3 — Amp
Output ripple COUT = 4.4 µF — 300 — mAPP
Output voltage — 70 — 85 Volts
Efficiency — 87 — — %
≈
≈
UCC28810
TZE
VDD
GDRV
ISNS
GND
EAOUT
VINS
VSNS
ENABLE LED PWMInput
PFC Output CC Buck Output
PFC Boost Follower
Primary GND
Critical Conduction Mode Low Side Buck Current Source
Half BridgeDC Transformer
Bias
1
2
3
4
5
6
7
8
UCC28811
VDD
GDRV
GND
TZE
VSNS
EAOUT
VINS
ISNS
1
2
3
4
8
7
6
5
TPS92020
VCC
GD1
GND
GD2
RT
DT
SS
Bias
Bias
+70V to 85V3A
NEW!
TexasInstruments2Q2010 LED Reference Design Cookbook
240-W LED Lighting System
TPS92020, UCC28810/1
17
➔
240-W LED Lighting System
TPS92020, UCC28810/1Power Factor Power Factor
Load Regulation Load Regulation
Efficiency Efficiency
LED Reference Design Cookbook TexasInstruments2Q2010
Constant Current Driver with PFC
UCC28810 PMP4501
18
➔
Description ThePMP4501isanisolated,off-line,AC-to-DCLED-currentdriverwithPFCforapplicationssuchascommercialfixturelightingandgeneralisolatedLEDdrivers.ThePMP4501isasingle-stageflybackPFCconverterthatdeliversupto34Wwitha180-to265-VACinputvoltagewhileprovidinga10-to48-Voutputvoltageataconstantoutputcurrentof700mA±2%.
ThePMP4501implementssecondary-sidecurrentcontrolfortheLEDstring.Overvoltageprotection
Key Features• IsolatedsinglestageLEDdriver• NaturallyhighPFC• 90%efficient• Universalinputvoltagerange• 700-mAoutputcurrent• LowLEDripplecurrent
Web LinksDatasheets, user’s guides, samples:www.ti.com/sc/device/UCC28810
PMP4501 Reference Design Schematic
L11mH
D1DF06S
C10.1µF
L220mHT
P1
TP
2
C30.15µF275VAC 3
2
4
1
F11A/250V
C11µ
C922nF
C14DNP
R1911K
R141.5M
R91.5M
R1100K
R4100K
R710K
Q1PZT2222A
R82.2
D2BYG10M
D3BYG10M
R6100K
C6100µF
25V
C11.1µ
C1210pF
R106.98K
R22330
R2047.5K
R2147.5K
R230.82
4
3
32
56
7
8
12
A
5
4
7
8
2
1
9
10
1
4
1
2
R1610
+C747µF63V
D4S1KB
D6BAS16
D815V
D7MURA140T3
D11MBR0520L
U3TCMT1107
D13BAW56
D1212V
D9MURA120T3
D5PDU540-13
T1G094010LF
+
R222KR322K
C210nF
C1047µF35V
C81000pF Y1
Q3 3904
+
C4470µF
63V
+ C5470µF63V
+
C1547µF35V
C161µF
R2710K
R2610K
R283.32K
R242.21K
R111K
R1223.7K
R131K
R50.15
J110V...48V . 700mAGND
U1:BTL103WID
R172.49K
D1051V
TP3
TP5
TP4
R2510K
U1:ATL103WID
C17220µF
C131µ
+
Q2STB7NK80ZT4
U2UCC28810D
8765
1234
VDDGDRV
GNDTZE
VSNSEAOUTVINSISNS
R1810K
For Test PurposeOnly. R17=50Ω
preventsdangerousoutputvoltagesfromoccurringduringopen-stringconditions.Acurrent-senseamplifierreducesthesensingresistor’spowerdissipation,thusincreasingoverallefficiency.TheinternalreferencevoltageoftheoperationalamplifierachievesexcellentLED-currentregulationversusoutputpowerandinputvoltage.ThePMP4501achieveshighefficiency(90%peak),highpowerdensityandahighpowerfactor.ThereferencedesignprotectsagainstscenarioswithopenandshortLEDstrings,andthecontrolstageisasimpleandrobustdesign.
Formorereferencedesigns,see:www.ti.com/powerreferencedesigns
Design Specifications
Description Parts
VIN (AC)
Range
VOUT (DC)
RangeNumber of LEDs
IOUT (max)
POUT (max) Eff. PFC ISO
Dimming In
Dimming Out EVM
UCC28810 PMP4501 34-W
UCC28810 180 10 V
3-13 700 mA 34 W 89% Yes Yes No NoReference
DesignSecondary side current loop TL103W 265 48.5 V
TexasInstruments2Q2010 LED Reference Design Cookbook
Constant Current Driver with PFC
UCC28810 PMP4501
19
➔
Constant Current Driver with PFC
UCC28810 PMP4501PMP4501 Board
Efficiency vs. Rectified-Equivalent Line Voltage and Output Power
Output Current Ripple. Input Voltage = 230 VAC, Output Voltage = 48 V @ 700 mA
Power Factor vs. Line Voltage and Output Power AC Input Current and Voltage at Full Load and Nominal Input Voltage
IOUT Regulation vs. Rectified-Equivalent Line Voltage and Output Power
LED Reference Design Cookbook TexasInstruments2Q2010
LED Streetlight Driver Based on SEPIC Technology
UCC28810 PMP3976
20
➔
Description ThePMP3976circuitshownbelowwasdesignedforacommercialLEDlightingfixture.TheSEPICtopologyhastheadvantageoveraflybackconverterinthatitclampstheswitchingwaveformsonthepowersemiconductor,allowingtheuseoflowervoltageandhencemoreefficientparts.Thisprovidesanestimated2%improvementinefficiencyinthisapplication.Additionally,thereislessringingintheSEPIC,makingEMIfilteringeasier.
TheLED-lightingcircuitusestheUCC28810transition-modeboostcontrollertoshapetheinput-currentwaveform.ThecircuitstartsbychargingC6offtheline.Oncethecontrollerisrunning,itspowerisprovidedbyanauxiliarywindingontheSEPICinductor.ArelativelylargeoutputcapacitorlimitsLEDripplecurrentto20%oftheDCcurrent.Asasidenote,theACfluxandcurrentsinthetransition-modeSEPICarequitehigh,soLitzwireandlow-loss
PMP3976 Schematic
Design Specifications
Parameter Minimum Typical Maximum Unit
Input voltage 150 — 264 VAC
Output voltage — — 300 Volts
Output current — 0.350 — Amp
corematerialarerequiredtoreduceinductorlosses.
Thefollowingmaterialpresentslabresultsfromaprototypethatwasbuilttomatchtheschematic.EfficiencyisquitehighovertheEuropeanlinerange,peakingat92%.Thisgoodefficiencywasachievedbylimitingtheringingonthepowersemiconductors.Also,ascanbeseenfromthecurrentwaveform,thepowerfactorisquitegoodatover96%.Interestingly,thewaveformisnotpurelysinusoidalbutshowssomesteepnessontherisingandfallingedges.Thisisbecausethecircuitmeasuresswitchcurrentbutnotinputcurrent.However,thewaveformisgoodenoughtopasstheEuropeanrequirementsforharmoniccurrents.
Key Features• Non-isolatedsingleLEDstringdriver• 92%efficientsolution• SEPICcontrolboostsforhigh voltage• Naturalsinglestagewith>0.9PFC• Low-costsolutionwithfewexternal
parts• MeetsEuropeanharmonic requirements
Web LinksDatasheets, user’s guides, samples:www.ti.com/sc/device/UCC28810
Reference designs:www.ti.com/powerreferencedesigns
++
+
U2UCC28810D
HS1
Q3SPP06N80C3
150VAC to 240VAC Input
LINE
NTRL
F11.6A/250V
RT12.5Ω
C1020.22µ
C1010.22µF
L14mH
R41.1 MEG0.25W
R111.1 MEG0.25W
R1515K
C100100pF
C121000pF
C4100pF C5
0.1µF
C6100µF25V
C1010pF
C81000pF
R13100K
R6100K
TP5R21 511
TP6
TP2
TP4
J1+LED
–LED
U1TLV431AIDBZ
R8100K
R20100K
R1815K
R17 301 R190.51W
R1200K0.25W
C20.22µF
T1750µH
C1 0.47µF
R3200K0.25W R23
20
R100 10
R12 1K
D100 MMSD914
R1015K
R101100K0.5W
C3330µF
R102100K0.5W
C71000pF
Q2MMBT3904
Q1MMBT2907
D4180V
R23.61W
D5180V
R9100K
R7 200K
R5 49.9K
D3 MMSD914
D1 MUR8100E
R161K
C922µF
C112.2µF
D2KBP06G
+
–4
2
1
3AC
AC
34
21
1
1 1
1
1 1
1
1 1
1
1
1
12
3
1
1
1
1
11
2
4
5
0
8
7
1
1
1
VCCDRVGNDZCD
VSNSCOMPMULTINCS
8765
1234
TP1
TP3
TexasInstruments2Q2010 LED Reference Design Cookbook
LED Streetlight Driver Based on SEPIC Technology
UCC28810 PMP3976
21
➔
LED Streetlight Driver Based on SEPIC Technology
UCC28810 PMP3976PMP3976 Rev B Demo Board Power Factor
Design Specifications
Parameter Minimum Typical Maximum Unit
Input voltage 150 — 264 VAC
Output voltage — — 300 Volts
Output current — 0.350 — Amp
The circuit is built on a PMP3976 Rev A PWB.
++
+
U2UCC28810D
HS1
Q3SPP06N80C3
150VAC to 240VAC Input
LINE
NTRL
F11.6A/250V
RT12.5Ω
C1020.22µ
C1010.22µF
L14mH
R41.1 MEG0.25W
R111.1 MEG0.25W
R1515K
C100100pF
C121000pF
C4100pF C5
0.1µF
C6100µF25V
C1010pF
C81000pF
R13100K
R6100K
TP5R21 511
TP6
TP2
TP4
J1+LED
–LED
U1TLV431AIDBZ
R8100K
R20100K
R1815K
R17 301 R190.51W
R1200K0.25W
C20.22µF
T1750µH
C1 0.47µF
R3200K0.25W R23
20
R100 10
R12 1K
D100 MMSD914
R1015K
R101100K0.5W
C3330µF
R102100K0.5W
C71000pF
Q2MMBT3904
Q1MMBT2907
D4180V
R23.61W
D5180V
R9100K
R7 200K
R5 49.9K
D3 MMSD914
D1 MUR8100E
R161K
C922µF
C112.2µF
D2KBP06G
+
–4
2
1
3AC
AC
34
21
1
1 1
1
1 1
1
1 1
1
1
1
12
3
1
1
1
1
11
2
4
5
0
8
7
1
1
1
VCCDRVGNDZCD
VSNSCOMPMULTINCS
8765
1234
TP1
TP3
LED Cookbook TexasInstruments2Q2010
22
➔
LED Streetlight Driver Based on SEPIC Technology
UCC28810 PMP3976Harmonic Content
The image above shows a thermal image of the board. The ambient temperature was 26ºC with no forced air flow. The input was 230 VAC.
Formorereferencedesigns,see:www.ti.com/powerreferencedesigns
Efficiency and Power Factor
Efficiency
Harmonic Content
The harmonic content and the EN61000-3-2 Class C (lighting equipments) Limits are shown above; input voltage was set to 230 VAC.
IOUT VOUT VIN LIN PF POUT LossesEfficiency
%
0.349 245.5 150.4 0.646 0.983 85.65 9.827 89.7
0.349 245.4 176.4 0.544 0.980 85.64 8.398 91.1
0.349 245.3 202.6 0.473 0.979 85.61 8.208 91.3
0.350 245.3 226.3 0.430 0.975 85.86 9.201 90.5
0.350 245.3 248.4 0.399 0.969 85.86 10.184 89.4
0.350 245.3 265.7 0.378 0.962 85.86 10.763 88.9
IOUT VOUT VIN LIN PF POUT LossesEfficiency
%
0.348 303.9 149.9 0.803 0.988 105.75 13.168 88.9
0.349 303.3 175.2 0.677 0.983 105.85 10.742 90.8
0.349 303.8 199.9 0.588 0.984 106.03 9.634 91.7
0.349 303.3 224.8 0.527 0.983 105.85 10.604 90.9
0.349 303.2 249.8 0.482 0.978 105.82 11.938 89.9
0.349 303.0 264.2 0.461 0.975 105.75 13.004 89.0
TexasInstruments2Q2010 LED Reference Design Cookbook
LED Streetlight Driver Based on SEPIC Technology
UCC28810 PMP3976
23
➔
Frequency Response
MOSFET Voltage Waveform
The frequency response of the feedback loop is shown in the plot above. The input was set to 220 VAC. The lower gain plot was taken with a 300 V output. The upper gain plot was taken with a 250 V output.
The image above shows the drain-to-source voltage on Q3. The input was set to 250.
Line Voltage and Current Waveform
The image above shows the input voltage and current. The input voltage was 230 VAC.
Diode Voltage Waveform
Inductor Winding Currents
The image above shows the voltage on the anode of D1. The input was set to 250 VDC.
The two images above show the currents in the individual windings of the inductor.
LED Reference Design Cookbook TexasInstruments2Q2010
25-Watt Dimmable Driver with PFC
UCC28810/UCC28810EVM-001
24
➔
Description TheUCC28810EVM-001evaluationmodule(EVM)isa25-WTRIACdimmableandsingle-stageflybackconverterwithPFC.TheUCC28810EVM-001providesapproximately36Vataconstant700-mA(undimmednominal)loadcurrenttopowerastringofhigh-brightnessLEDs.ThisEVMallowstheevaluationoftheUCC28810LEDlightingcontrollerinanapplicationwhereLEDscanbeusedforgeneralilluminationapplicationsthatrequiredimming.
resistanceisusedacrossthelineorinseriesthatwouldreduceefficiency.ValleyswitchingisimplementedintheUCC28810EVM-001toimproveefficiency.Afaststart-upcircuitisalsoimplemented,sothereisnoperceiveddelayfromswitchingtoillumination.
Web LinksReference designs:www.ti.com/powerreferencedesigns
Datasheets, user’s guides, samples:www.ti.com/sc/device/UCC28810
EVM:www.ti.com/ucc28810evm-001
UCC28810EVM-001 Block Diagram
Design Specifications
Description Parts
VIN (AC)
Range
VOUT (DC)
RangeNumber of LEDs
IOUT (max)
POUT (max) Eff. PFC ISO
Dimming In
Dimming Out EVM
UCC28810 EVM001 25-W
UCC28810 85
33 10 700 mA 25 W 89% Yes Yes TRIAC Linear YesPFC dimmable LED driver TPS3808 305
UsingtheUCC28810transition-modeboostICwithPFCinaflybackconverteryieldsavalley-switchingdesignthatcanachieve90%efficiencyandahighpowerfactoroverauniversalwideinput-voltagerange.TheUCC28810EVM-001alsooperatesoverauniversalwideinput-voltagerange.High-performanceTRIACdimmingdetectionandregulationadjustmentareachievedwithminimalimpactonefficiency.
Aninput-filterdampingnetworkensuresoperationswithmostTRIAC-basedwalldimmers.Noextra
VSENSE
UCC28810
EAOUT
VINS
ISENSE
1
2
3
4
8
7
6
5
VDD
Dimmer
GDRV
GND
TZE
Input Filter and Bridge
High Voltage Startup
ZeroEnergyDetect
PrimaryBias
SecondaryBias
CurrentEA
Voltage LimitEA
Triac Dimming Detection
TexasInstruments2Q2010 LED Reference Design Cookbook
25-Watt Dimmable Driver with PFC
UCC28810/UCC28810EVM-001
25
➔
25-Watt Dimmable Driver with PFC
UCC28810/UCC28810EVM-001Efficiency vs. Line Voltage
Load current as a function of line voltage. 10 Cree XLamp® 7090 XR-E, white, 700 mA LEDs connected in series was used for the load.
Triac Dimming Detection Circuit Waveforms – Deep Dimming
Power Factor vs. Line Voltage
Total Harmonic Distortion vs. Line Voltage Triac Dimming Detection Circuit Waveforms – Light Dimming
Output Current vs. Line Voltage
Efficiency as a function of line voltage. 10 Cree XLamp® 7090 XR-E, white, 700 mA LEDs connected in series was used for the load.
Power factor as a function of line voltage.10 Cree XLamp® 7090 XR-E, white, 700 mA LEDs connected in series was used for the load.
Total harmonic distortion as a function of line voltage. 10 Cree XLamp® 7090 XR-E, white, 700 mA LEDs connected in series was used for the load.
LED Reference Design Cookbook TexasInstruments2Q2010
Nonsynchronous Boost LED Driver
TPS40211 PMP4026
26
➔
Description TheTPS40211isawide-input-voltage(4.5-to52-V),nonsynchronousboostcontroller.Itissuitablefortopologiesthatrequireagroundedsourcen-channelFETsuchasboost,flyback,SEPICandvariousLED-driverapplications.TheTPS40211featuresaprogrammablesoftstart,overcurrentprotectionwithautomaticretry,andaprogrammableoscillatorfrequency.Current-modecontrolprovidesimprovedtransientresponseandsimplifiedloopcompensation.Thefeedbackpinhasareferencevoltageof260mVtohelpreducethepowerusageandcostofthesenseresistor.
ThePMP4026circuitshownbelowwasdesignedwithanautomotiveinput-voltagerange.Thedriverwasbuilttooperateunderlow-powertonominalbatteryconditionsandtosurviveload-dumpincidents.TheTPS40211waschosenforthisapplicationduetoitslowfeedbackvoltageandwide
Key Features• Wide4.5-to52-Vinputrange• Low-costnon-synchronousboost• Highefficiencyfromlow260-mV
VREF• Simpleloopcompensation• SupportsversatileSEPICtopology
Web LinksDatasheets, user’s guides, samples:www.ti.com/sc/device/TPS40211
PMP4026 Schematic
TPS40211DGS
48V @ 0.7AGND
VDDVBP
GDRVISNSGND
RCSSSDCOMPFB
109876
Freq = 150 KHZ
12345
C71µ
D100(R6)3.3V
VBP
R549.9K
R110.01C9
100pF
R101.21K
Q1Si4858
R215K
C1470pF
R3249K
R1249K
R10010K
C44700pF
C83.3µF
3 2 1
4G
S
D8 7 6 5
1 2
R4A2
D247V
R949.9
C12B3.3µF50V
C12A3.3µF50V
D1MBRS260
1
2
3
Q1002N7002DICT
9 - 18 VINGND
C50.1µ
33 µH
ENAB
Design Specifications
Parameter Minimum Typical Maximum Unit
Input voltage 9 — 16 VDC
Output voltage — — 40 Volts
Output current — 0.700 — Amp
Switching frequency — 150 — kHz
input-voltagerange.Theapplication,powereddirectlyfromVBAT,canhaveastringofuptoten700-mALEDsinseriesortwoparallelstringswithuptoten350-mALEDsineachstring.
Anadditionalreferencedesignisavailable.Thisdesignisa700-mA,nonsynchronousboostcurrentregulatorforanLEDdriver.Ithasan8-to18-Vinputanda20-to35-Voutput.Itcanbefoundalongwithademonstrationboardat:
http://focus.ti.com/docs/toolsw/folders/print/tps40211evm-352.html
Formorereferencedesigns,see:www.ti.com/powerreferencedesigns
TexasInstruments2Q2010 LED Reference Design Cookbook
Nonsynchronous Boost LED Driver
TPS40211 PMP4026
27
➔
Nonsynchronous Boost LED Driver
TPS40211 PMP4026Startup
Efficiency Control Loop Frequency Response: 12 V input; 1.15 A Load
Load Regulation of Outputs Load Transients
Output Ripple Current
The input voltage was set at 12 V, with 0.15 (LED) + 1 (resistor) A load on the outputs. The image was taken with a 1.15 A/20 V load. Top waveform is FET drain, bottom is LED current.
Total output current was 1.15 A, output voltage was 20 volts.
Output response to driving TP%. The input voltage was set to 12 V.
LED Reference Design Cookbook TexasInstruments2Q2010
Wide-Input DC Voltage Range SEPIC Driver
TPS40211 PMP3943
28
➔
Description TheTPS40211isawide-input-voltage(4.5-to52-V)nonsynchronousboostcontroller.Itissuitablefortopologiesthatrequireagroundedsourcen-channelFETsuchasboost,flyback,SEPICandvariousLED-driverapplications.TheTPS40211featuresaprogrammablesoftstart;overcurrentprotectionwithautomaticretry;andaprogrammableoscillatorfrequency.Current-modecontrolprovidesimprovedtransientresponseandsimplifiedloopcompensation.Thefeedbackpinhasareferencevoltageof260mVtohelpreducethepowerusageandcostofthesenseresistor.
ThePMP3943circuitshownbelowwasdesignedwithanautomotiveinput-voltagerange.Thedriverwasbuilttooperateunderlow-powerbatteryconditionsandtosurvive
PMP3943 Schematic
Design Specifications
Parameter Minimum Typical Maximum Unit
Input voltage 8 — 40 Volts
Output voltage — 13 — Volts
Output current — 0.350 — Amp
Switching frequency — 300 — kHz
U1TPS40211DGS
J1VIN
GND8-40
Short L4L40
13V @ 350mATested with LEDs
Giving 12.3 V
LEDA
LEDC
LEDC
D18180-13C15
3.3µF
VDDVBP
GDRVISNSGND
RCSSSDCOMPFB
109876
Freq = 380 KHZ
3 2 1
4
8 7 6 5
3 4
1 2
12345
03
L2100µH
R101k
R949.9
R549.9
R710
C71µF
R60
R140.75
C1310µF
R110.10
D218V
R10010K
R20
R1249K
C44700pF
C83.3µF
C50.1µF
C1220pF
C347pF
C20.22µF C9
0.1µF
1
2
load-dumpincidents.TheTPS40211waschosenforthisapplicationduetoitslowfeedbackvoltageandwideinput-voltagerange.
Anadditionalreferencedesignisavailable.Thisdesignisa700-mA,nonsynchronousboostcurrentregulatorforanLEDdriver.Ithasan8-to18-Vinputanda20-to35-Voutput.Itcanbefoundalongwithademonstrationboardat:
www.ti.com/sc/device/TPS40211evm
Formorereferencedesigns,see:www.ti.com/powerreferencedesigns
Key Features• Wide4.5-to52-Vinputrange• Low-costnon-synchronousboost• Highefficiencyfromlow260-mV
VREF• Simpleloopcompensation• SupportsversatileSEPICtopology
Web LinksDatasheets, user’s guides, samples:www.ti.com/sc/device/TPS40211
TexasInstruments2Q2010 LED Reference Design Cookbook
Wide-Input DC Voltage Range SEPIC Driver
TPS40211 PMP3943
29
➔
Wide-Input DC Voltage Range SEPIC Driver
TPS40211 PMP3943
3 Green and 1 Red OSRAM LEDs Used as Load for Vf About 12 V
VIN Volts IIN mA VOUT1 Volts IOUT1 mA Efficiency %
40.22 123.6 12.27 341.8 84.4
20.11 238.5 12.27 341.3 87.3
7.93 619.4 12.27 341.3 85.3
Regulation and efficiency: 25 degrres Celsius ambient. Target IOUT was 350mA, hence actual current is 2.5% low.
When Diode Load is Opened, VOUT Goes to About 18 V
VIN Volts IIN mA VOUT1 Volts IOUT1 mA
40.42 8.79 18.44 0
20.08 10.75 18.41 0
8.00 19.12 18.40 0
Short Circuit: Output Current Holds Steady
VIN Volts IIN mA VOUT1 Volts IOUT1 mA
40.14 21.24 0.694 341.6
20.06 34.20 0.694 341.5
8.00 77.70 0.694 341.4
Current Loop Frequency Response
LED Reference Design Cookbook TexasInstruments2Q2010
TMS320C2000™ PLC Modem Evaluation Kit
TMDSPLCKIT-V1
TMS320C2000™ PLC Modem Evaluation Kit
TMDSPLCKIT-V1
30
➔
Description Power-linecommunication(PLC)isaninexpensivewaytoaddlightingcontroltoexistingornewbuildingsandinfrastructureswithoutlayingdownnewcontrolcabling.TheTMDSPLCKIT-V1isaPLCevaluationkitbasedontheC2000™seriesofreal-timemicrocontrollers.ItoperatesinbothOFDMandS-FSKmodulationschemesandhasdataratesofupto76.8kbps.
Thekitcomeswithaneasy-to-useGUIthatmakestestingthecommunicationslinkintuitiveandsimple.
Web Linkswww.ti.com/plcevm
Datasheets, user’s guides, samples:www.ti.com/sc/device/OPA564 orwww.ti.com/sc/device/PGA112
TMDSPLCKIT-V1 Block Diagram
Specifications• OFDMandS-FSKmodulation
schemes• Dataratesofupto76.8kbpsforone
phase(phaseselectionisprovided)• PLCsystemonmodule(SoM)
withinterfacetohostcontroller(I2C,SPI,SCI)
• CompatiblewithCENELECEN50065andIEC6100-3standards
• Operatingfrequencyrange:24to94.5kHz(CENELECAband.Bbandtoreleasein1Q10.)
• UniversalAC-voltageinput(85to270VAC)
Formorereferencedesigns,see:www.ti.com/powerreferencedesigns
PWM Out
Line Driver
OPA564
PGA112
Receive Filter
Surge Protector
Power Line
CouplingTransformerHV Cap
PLC Modem Implementation on TMS320F28x 32-Bit MCU - Simplified Block Diagram
12-BitADC
FlexiblePLCSW
Engine
TMS320F28x
NEW!
TexasInstruments2Q2010 LED Reference Design Cookbook
TMS320C2000™ PLC Modem Evaluation Kit
TMDSPLCKIT-V1
31
➔
TMS320C2000™ PLC Modem Evaluation Kit
TMDSPLCKIT-V1PLC Data Signal
50- or 60-Hz Power Line
PLC Signal Modulated Onto the Power Line 50/60Hz
LED Reference Design Cookbook TexasInstruments2Q2010
Digital Addressable Lighting Interface (DALI)
DALI Implementation with the MSP430™ MCU
32
➔
Description Intelligentlightingcontrolcanprovidelargeefficiencygainsandenergysavings.Thedigitaladdressablelightinginterface(DALI)standardisbecomingincreasinglypopularforthisapplication.
TheDALIevaluationkitenablesthedesignertorunDALIonthepopularMSP430seriesofmicrocontrollers.SoftwarelibrariesandhardwarereferencefilesareprovidedtoallowquickevaluationanddevelopmentwiththeDALIstandard.
Web LinksApplication Note:www.ti.com/lit/SLAA422
MSP430-Based DALI Reference Design
Specifications• Fullhardwarereferencefiles,
includingschematics,GerberfilesandBOM
• Fullsoftwarelibraries• SupportfortheentireDALI
commandset,includingbidirectionalcommands
Formorereferencedesigns,see:www.ti.com/powerreferencedesigns
DALI+
DALI—
GND
1
2
4
3
MSP430™MCU
GND
1
2
4
3
NEW!
TexasInstruments2Q2010 LED Cookbook
33
➔
DC/DC LED Developer’s Kit
TMDSDCDCLEDKIT
Digital Addressable Lighting Interface (DALI)
DALI Implementation with the MSP430™ MCUDescription TheDC/DCLEDDeveloper’sKitincludesallofthehardwareandsoftwaretostartexperimentingwithanddevelopingadigitallycontrolledLEDbacklightingsystem.ThekitisbasedonthePiccolo™microcontrollerandthecontrolCARD™developmentplatform.OnePiccoloMCUisabletodirectlycontroltheDC/DCpowerstageaswellaseightLEDstrings.Thedevelopmentboardtakes12to48VDCofinputandusesaSEPICDC/DCtopologytobuckorboosttheinputvoltagetoadesiredlevel.ThisvoltageisthenfedtofourLED-drivingstages,eachcapableofdrivingtwoLEDstringsatupto30Weach.Thekitincludesclosed-loop,open-sourcesoftwareforboththeDC/DCstageandtheLED-lightingstage.Thekithardwareisalsocompletelyopen-source,withtheGerberfiles,
Web LinksDatasheets, user’s guides, samples:www.ti.com/c2000tools
Typical Application Schematic
schematicsandBOMsallavailableforfree.Formoreinformation,pleaseseethequick-startguideforthekit.TodownloadtheLEDsoftware,pleasevisit:www.ti.com/c2000tools
Key Features• 12-to24-VDCinputtoSEPICDC/DC
stage,12-to40-VDCoutput• FourLED-driverstages,eachcapable
ofdrivingtwostringsat30W• LED-driverstagescanbeexternally
powered• Piccolo-basedcontrolCARD
developmentplatform• Open-sourcehardware,including
Gerberfiles,schematicsandBOMs• Closed-loopDC/DCandLED-driving
software,completewithsourcecodeanddocumentation
DC12 V to 48 V
Sepic
Piccolo™
CPU32 bit
PWM-1A
B 2
1
2
PWM-1A
B
3
4
PWM-1A
B
5
6
PWM-1
I2CSPI
UART
A
B
7
8
3
1
3
2
3
4
8
9
1
+
+
2
3
13
ADC12 bit
VREF
33
NEW!
LED Reference Design Cookbook TexasInstruments2Q2010
34
➔
Description TheTPS61165operatesovera3-to18-Vinputsupplyanddeliversanoutputvoltageupto38V.Withits40-VratedintegratedswitchFET,thedevicedrivesupto10LEDsinseries.Itoperatesata1.2-MHzfixedswitchingfrequencytoreduceoutputripple,improveconversionefficiency,andallowfortheuseofsmallexternalcomponents.Thedefaultwhite-LED(WLED)currentissetwiththeexternalsensorresistorRSET,andthefeedbackvoltageisregulatedto200mV.IneitherdigitalorPWMdimming,theoutputrippleofTPS61165attheoutputcapacitorissmallanddoesnotgenerateaudiblenoisesassociatedwithcommonon/offcontroldimming.Forprotectionduringopen-LEDconditions,theTPS61165disablesswitchingtopreventtheoutputfromexceedingtheabsolutemaximumratings.
ThePMP3598usestheTPS61165inanonsynchronousboostconfiguration.Anadditionalcircuitbuiltaroundtheopampprovidesthebatteryunder-voltage/chargingindicationsandalsoprovidesORingbetweenthesolarpanelandbatteryinputs.Thecircuitalso
PMP3598 Schematic
Design Specifications
Parameter Minimum Typical Maximum Unit
Input Voltage 4.5 6 7.4 Volts
Output Voltage 10.45 10.5 10.65 Volts
Output Ripple — — 50 mV pp
Output Current 0 — 350 mA
Switching Frequency — 1200 — kHz
J1 D1BAT54C
D3BAT54C
R11K
D5MBRS120
R181
R161
R6169K
R11226K
R9169K
R34.42K
R42.25M
R210K
R54.42K
U1:BTL103WID
U2
TP
S61
165D
RV
D6BZX84C18T
R1310K
R8Open
D4IN5820
R121K
R2151.1
C22.2µF
C30.22µF
C43.3µF
R1459K
R15100K
R10162K
R176.81K
RT122K
R7100K
C10.1µF
Q1Si2343DS
TP
1
TP
2
TP
5
12
23
65
1 2 3
6 5 4
7
1 2 3 4 5 6 7 8
J41
2
J31
2
L110µH
TP3
TP4 To 28K POT
LED ALED C
R202.61K
4
5
7
FB CO
MP
GN
D
VIN
CT
RL
SW
Pw
Pd
incorporatesthenecessarythermalandovercurrentprotectionsandhasload-disconnectfeature.
KeyconsiderationsforthisdesignarehighefficiencyandgoodLED-currentregulation.TheTPS61165operatesinaconstant-currentmodetoregulatetheLEDcurrent.TheCTRLpinisusedforthecontrolinputforbothdigitalandPWMdimming.ThedimmingmodefortheTPS61165isselectedeachtimethedeviceisenabled.Analogdimminghasbeenimplementedbyvaryingthefeedbackreference.A20-kWvariableresistorcanbeusedtovarytheLEDcurrenttoachievedimming.Theconverterboosts6to10.5Vat350mAandhasminimumconversionefficiencyof85%.Thiscircuitis
usedfordrivingthree1-WLEDsormultiple50-mALEDswhostotalpowerinputdoesnotexceed3W.
Key Features• Boostoutputupto38Vout• Widesupplyvoltage3Vto18V• Highefficiencyfrom200-mV threshold• PWMdimming• LEDopenprotection• 350-mALEDcurrent
Web LinksReference designs:www.ti.com/powerreferencedesigns
Datasheets, user’s guides, samples:www.ti.com/sc/device/TPS61165
3-Watt Solar Lantern
TPS61165 PMP3598
TexasInstruments2Q2010 LED Reference Design Cookbook
3-Watt Solar Lantern
TPS61165 PMP3598
35
➔
Switching Waveform
Open LED Protection
Efficiency
Output Ripple
LED Reference Design Cookbook TexasInstruments2Q2010
High-Brightness LED Driver with Switch Control
TL4242
High-Brightness LED Driver with Switch Control
TL4242
36
➔
Description High-brightnessLEDsarebecomingmoreandmoreprevalentinallfacetsoflife.Lineardriversaregreatforsimpleapplicationsthatdonotrequireveryhighefficiencyandforapplicationsthatmusthavelittleornoelectromagneticinterference(EMI).Pulse-widthmodulation(PWM)isusedfordimminginsomeoftheseapplicationsbutcanalsointroduceEMI.ThisreferencedesignusesasimplelinearLEDdriverforhigh-brightnessapplicationsanddemonstratesoneofseveralmethodsofcontrollingdimmingwithouttheintroductionofEMI.
TheTL4242isalinearconstant-currentsingle-channelLEDdrivercapableofsourcingupto500mA.TheTL4242iscapableofrunningfromasupplyofupto42VsothatalargeLEDstringcanbedriventhroughasingledevice.Figure1showsasimpleexampleoftheTL4242usedtodrivefourLEDs(typicalVF=3.5V).Inthisdesign,thePWMpinisusedonlytoenableanddisabletheTL4242.Thecurrentissetthroughaverysimplerelationshipbetweenthesenseresistor(RREF)andthevoltageattheREFpin(VREF):
IOUT=VREF/RREF
TheTL4242’stypicalVREFis0.177V.IfRREFissetto2W,thenthecorrespondingIOUTwillbe88.5mA.
IntheapplicationinFigure1,the18-VsupplycurrentisfeddirectlyintotheTL4242forLEDcurrent.TheTL4242alsomonitorstheLEDstringforanopenconditionandsetsthestatus(ST)pinifanopenisdetected.
ToenabledimmingwithoutPWM,RREFmustbechangedandiseasilymanipulatedwithasimpleanalogswitch.TheTS3A4742ischosen(seeFigure2)becauseofitslow(typically0.7-W)RON,high-current(100-mA)capability,dual-switchconfiguration
350mA.ChangingRREFP,RREFS1andRREFS2providesawidevarietyofdimminglevels.RREFS1andRREFS2mustbechosenwiththeRONoftheswitchinmind.Notethateachleghasthesamecurrentwhenitison,regardlessoftheotherlegs’current.
Figure 1. Simple TL4242 LED Drive Circuit
Figure 2. TS3A4742 Dual, Normally Closed Analog Switch Provides Four Brightness Levels
andnormallyclosedoperation.Caremustbetakentokeepthechannelcurrentunder100mA.
Figure2demonstratestheTL4242usedwiththeTS3A4742toproduceanLEDdimmingcircuitcapableofswitchingbetween200,250,300and
Formorereferencedesigns,see:www.ti.com/powerreferencedesigns
RREF
C147nF
+18V
10KΩ
TL4242 Q
REF
I
TPS7A4533
IN SHDN
GND SENSEOUTSTPWM
GND D
Controller
RREFP
C147nF
RREFS1RREFS2NC1
+3.3V
IN1
NC2IN2
COM2
COM1
+18V
10KΩ
3.3V
V+
GND
TS3A4742
TL4242 Q
REF
I
TPS7A4533
IN SHDN
GND SENSEOUTSTPWM
GND D
Controller
Switched Reference Resistors
Primary ReferenceResitor (RREFP) (RREFS1) (RREFS2)
Equivalent Resistance (RREF)
Nominal Output Current (IOUT)
0.885 W 1.77 W 3.54 W 0.506 W 350 mA
0.885 W 1.77 W Open 0.590 W 300 mA
0.885 W Open 3.54 W 0.708 W 250 mA
0.885 W Open Open 0.885 W 200 mA
Note: RREFS1 and RREFS2 include RON of the TS3A4742.
NEW!
TexasInstruments2Q2010 LED Reference Design Cookbook
High-Brightness LED Driver with Switch Control
TL4242
37
➔
High-Brightness LED Driver with Switch Control
TL4242
Figure 4. Switches in Series
Figure 3. Analog-Switch Brightness Control
Simple Pushbutton 1
RREFP RREFS1
NC1
+3.3V
IN1
NC2IN2
COM2
COM1
+3.3V
+18V
10KΩ
Simple Pushbutton 2
V+
GND
TS3A4742
TL4242 Q
REF
I
TPS7A4533
IN SHDN
GND SENSEOUTSTPWM
GND D
RREFP
C147nF
RREFS
NC1
+3.3V
IN1
NC2IN2
COM2
COM1
+18V
10KΩV+
GND
TS3A4742
TL4242 Q
REF
I
TPS7A4533
IN SHDN
GND SENSEOUTSTPWM
GND D
Controller
ChoosingadualswitchwithalowRONallowstheusertoconnectbothchannelsinparallel,therebyreducingtheeffectiveRON.ThisparallelapproachcanreducetheTS3A4742’stypicalRONto0.35W.Figure3showsanexampleusingthisparallelapproachtogenerateadual-brightnessdesign.Thisapplicationusesa0.65-Wresistor(RREFS1)inserieswithbothswitches,creatinganeffectiveRREFof1-W.Thislegwillsink177mA(88.5mAthrougheachswitch)whenon.Caremustbetakentokeepthecurrentthroughtheanalogswitchbelowthemaximumallowed.Additionally,thepowerdissipationintheswitchpackagemustbeconsidered.InthecaseoftheTS3A4742,themaximumcontinuouscurrentis100mAperchannel.Figure3alsoremovesthecontrollerandreplacesitwithsimplepush-buttonswitches.Thisdesignallowsasinglebutton(orothermanualcontrol)toenabletheLEDs(simplepush-button1)andanothertosetthebrightnesslevel(simplepush-button
2).Thisisasimpleautomotivetail-lightsolutionforon/offandbraking.ThetaillightisonwhenPWMishigh(push-button1isnotdepressed).Thebrightnessofthetaillightisnormalwhenpush-button2isnotdepressedandbrighterwhenitisdepressed.
Anotheroptionistohookuptheswitchesinaserialmanner(seeFigure4),therebydoublingthe
resistanceto1.4W.Thisalsopermitsdualbrightness;butthecurrentthroughtheTS3A4742islimitedto100mAperchannel,sothebrightnesswillbelowerthanwhenthechannelsareinparallel.
Web LinksDatasheets, user’s guides, samples:www.ti.com/sc/device/TL4242
Primary Reference Resistor
(RREFP)
SwitchedReference Resistors(RREFS1 + RREFSwitch)
Equivalent Resistance (RREF)
Nominal Output Current
(IOUT)
1 W 1 W + 1.4 W = 2.4 W 1.09 W 162 mA
1 W Switch Open 2 W 88.5 mA
.
LED Reference Design Cookbook TexasInstruments2Q2010
High-Brightness LED Driver with Single-Clock Operation
TLC5917
High-Brightness LED Driver with Single-Clock Operation
TLC5917
38
➔
Description TheTLC5917isan8-channel,constant-currentLEDdrivercapableofupto120mAperchannel.ThisisagreatfitwhenanapplicationrequiresaconstantLEDcurrentthatisindependentofinputvoltage,temperatureanddifferencesinLEDforward-voltagedropsresultingfromuncontrolledmanufacturingprocesses.Theoutputscanalsobetiedinparallelwhenneededtodrivehigh-brightnessLEDs.Communicationisaccomplishedthroughabasicserialport.Manyapplicationsdonothavethecapabilityforgeneratingevensimpleserialcommands.Thisreferencedesignallowsausertoovercomethisissuewithasimple555timer.
TheTLC5917driveseightindependentconstant-currentsinks.Normally,amicroprocessordrivesthe/OE(outputenable),SDI(serialdatainput),CLK(clock)andLE(latch)pinswithfourseparateGPIOpins,whichallowsthecurrentsinktobeindependentlyturnedonandoff.IfindependentLEDcontrolisnotneeded,theTLC5917canbeturnedonwithasingleclocksignalora555timer.• /OE(outputenable)—Thispin
enablesanddisablesalloutputs.• SDI(serialdatainput)—Thedata
clockedintothispinprogramseachoutputtobeonoroff.
Figure 1. TLC5917 Driven by 555 Timer
LEDson.PullingSDIlowturnsallLEDsoffaftereightclockcycles.Figure2showshowtheTLC5917respondstoturn-onandturn-offwhenitisconfiguredasshowninFigure1.NotethatFigure1showsalltheTLC5917outputsconnectedinparalleltodriveasinglehigh-brightnessLED.TheTLC5917outputscaneitherdriveeightindependentLEDsorbeconnectedinparalleltodrivehigher-powerLEDs.InFigure1,R3=178W,whichsetseachoutputcurrentat105.3mA.Connectingalloutputsinparallelyields105.3mAx8=842.4mAofLEDcurrent.
Thissameapproachcanbeusedforanyofthe8-and16-channelTLC59xxfamilies,includingtheTLC5916/25/26/27andTLC59025.
Web LinksDatasheets, user’s guides, samples:www.ti.com/sc/device/TLC5917
• CLK(clock)—TherisingedgeoftheclockshiftsSDIdataintointernalshiftregisters.
• LE(latch)—ThefallingedgeofLElatchesdatafromtheinternalshiftregistersintotheinternalon/offlatches.
CloseexaminationoftheTLC5917timingdiagramrevealsthatasinglePWMsignalcanreplacetheCLKandLEinputsbecausetherisingedgeofCLKshiftsdataintotheICandthefallingedgeofLElatchesthedata.Figure1showshowtoconfiguretheTLC5917tooperatefromasingleclocksignal.
/OEmustbeconnectedtogroundtoenabletheIC.TheSDIpincanbeconnectedtoVCCtoshift1’sintotheICtoturnalloutputson,andcanbeconnectedtogroundtoshiftall0’sintotheICtoturnalloutputsoff.TheCLKandLEpinscanbeconnectedtoanytypeofPWMsignal.Turn-onandturn-offtimeswiththiscircuitdependontheclockfrequency.Atpowerup,theTLC5917’sinternalon/offlatchesthatturneachoutputonoroffdefaultto“0”,sotheselatchesmustbesetto“1”beforetheoutputsturnon.Eachrisingandfallingedgeoftheclocksignalsequentiallyturnsoneachoutput,startingwithOUT0.Therefore,ittakeseightclockcyclestoturnall
U2TLC5917PW
ON/OFF Control
ON/OFF
R3178
C30.1µ
C40.1µ10kHz Clock
C20.1µ
C11500p
R220.0k
R137.4k
Outputs connected in parallel for 842mALED current
High PowerLED
OUT0
OUT1
OUT2
OUT3
OUT4
OUT5
OUT6
OUT7
VDD
CLK
LE(ED1)
(ED2)OE
SDI
SDO
R-EXT
GND
U1TLC555D
VCC
RESET
DISCH
THRES
TRIG
GND
OUT
CONT
16
3
4
13
2
14
15
1
8
4
7
6
2
1
3
5
5
6
7
8
9
10
11
12
VCCVCC
NEW!
TexasInstruments2Q2010 LED Reference Design Cookbook
High-Brightness LED Driver with Single-Clock Operation
TLC5917
39
➔
Figure 2. LED’s Turn-On and Turn-Off Responses with 10-kHz Clock
Formorereferencedesigns,see:www.ti.com/powerreferencedesigns
LED Reference Design Cookbook TexasInstruments2Q2010
Wireless-Controlled Triple LED Driver
TPS62260 TPS62260LED
40
➔
Description Residentialandcommerciallightingcantakeadvantageoftheadditivecolormixingofred,greenandblueLEDs.ThisreferencedesigndemonstrateshowtoremotelymanagethecoloroutputofanLEDlampwithalow-powerwirelesscontroller.ThecolorisgeneratedbythreeLEDs(red,greenandblue).AnMSP430™ultralow-powermicrocontrollercontrolsthebrightnessofeachLEDwithconstantcurrentgeneratedbythreeTPS62260buckconverters,oneforeachLED.
Thecolorlook-uptabletakestheformofanarraystoredintheMSP430.Whenevertherotaryencoderisturned,newred,greenandbluevaluesarereadfromthearrayandusedtogeneratethethreePWMoutputsignals.Currently252valuesarestored,whichcanbechangedifdesired.Adecimalvalueof100switchestheLEDoff,andavalueof65535producesamark-spaceratioof100%.Whenthe5-Vsupplyisapplied,
MSP-FET430UIFtoolscanbefoundrespectivelyat:
http://focus.ti.com/docs/toolsw/folders/print/ez430-rf2500.html andhttp://focus.ti.com/docs/toolsw/folders/print/msp-fet430uif.html
Key Features• WirelessRGBcolormixing• Ultra-low-powerMSP430controller• Wirelessdevelopmenttoolavailable
Web LinksDatasheets, user’s guides, samples:www.ti.com/sc/device/TPS62260
EVM:www.ti.com/tps62260led-338
TPS62260LED-338 Schematic
Design Specifications
Parameter Minimum Typical Maximum Unit
Input voltage 4.5 5 5.5 VDC
Output current — 0.300 — Amp
U1MSP430F2131RGE
NCVSSXOUT/P2.7/CA7XIN/P2.6/CA6NM /RSTP2.0/ACLK/CA2P2.1/INCLK/CA3P2.2/CAOUT/TA0/C44P1.4/SMCLK/TCKNCP2.3/TA1/CA0P2.4/TA2.CA1NC PwPd
P2.5/CA5VCC
TESTP1.7/TA2/TDO/TDI
P1.6/TA1/TDI/TCLKNC
P1.5/TA0/TMS
P1.3/TA2P1.3/TA1P1.1/TA0
P1.0/TACLK
123456789
101112
2468
101214
654321
135791113
JP1
NET-DIMM_LED1NET-DIMM_LED2NET-DIMM_LED3NET-EN
242322212019181716151413
3.3V
3.3V
3.3V
R6100K
R3100K
R4100K
C310n
S1
R547K
C2100n
3.3V
JP2
eZ430=RF Connector
thedesigngoesintoademonstrationmodewherethevaluesstoredinthearrayarereadandoutputinsequenceinaninfiniteloop.Assoonastherotaryencoderisturned,thesequencestopsandaparticularfixedcolorvaluecanbeselected.
ThereisapinheaderthatcanbeusedtoplugintheRFboardfromtheMSP430WirelessDevelopmentTool(theeZ430-RF2500),whichisseparatelyavailable.Withthisadditionalmodule,thelamp’scolorscanbecontrolledremotelyviathewirelessRFinterface.
IfadesignerpreferstoreprogramtheMSP430,aseparateMSP430flashemulationtoolcanbeordered,suchastheMSP-FET430UIF.MoreinformationontheeZ430-RF2500and
Formorereferencedesigns,see:www.ti.com/powerreferencedesigns
TexasInstruments2Q2010 LED Reference Design Cookbook
Wireless-Controlled Triple LED Driver
TPS62260 TPS62260LED
41
➔
Wireless-Controlled Triple LED Driver
TPS62260 TPS62260LEDRed LED
Green LED
Blue LED
Design Specifications
Parameter Minimum Typical Maximum Unit
Input voltage 4.5 5 5.5 VDC
Output current — 0.300 — Amp
U11TPS62260DRV
red
<1206>
C1222µF
R122
R1110K
R1310K
D14
D13
TS4148RY
C114.7µF
1
C134.7µF ???mV
TP11
GNDVINEN
SWMODE
FBPwPd
654
123
7
TP12
TP13
VIN
L11
NET-DIMM_LED1
+5V
NET-EN
U21TPS62260DRV
green
<1206>
C2222µF
R222
R2110K
R2310K
D24
D23
TS4148RY
C214.7µF
1
C234.7µF ???mV
TP21
GNDVINEN
SWMODE
FBPwPd
654
123
7
TP22
TP23
VIN
L21
NET-DIMM_LED2
+5V
NET-EN
C14.7µF
D1BZX84-C3V3
C422µF
R2330
VINmax < 6V
+5VJ1123
3.3V
U31TPS62260DRV
blue
<1206>
C3222µF
R322
R3110K
R3310K
D34
D33
TS4148RY
C314.7µF
1
C334.7µF ???mV
TP31
GNDVINEN
SWMODE
FBPwPd
654
123
7
TP32
TP33
VIN
L31
NET-DIMM_LED3
+5V
NET-EN
LED Reference Design Cookbook TexasInstruments2Q2010
Low-Voltage Buck Boost for LED Torch
TPS63000 PMP3038
42
➔
Description TheTPS63000providesapower-supplysolutionforproductsthatuseatwo-orthree-cellalkaline,NiCdorNiMHbattery,oraone-cellLi-IonorLi-Polymerbattery.Thebuck-boostconverterisbasedonafixed-frequencyPWMcontrollerthatusessynchronousrectificationtoobtainmaximumefficiency.Themaximumaveragecurrentintheswitchesislimitedtoatypicalvalueof1800mA,andtheconvertercanbedisabledtominimizebatterydrain.Duringshutdown,theloadisdisconnectedfromthebattery.Thedeviceispackagedina10-pinQFNPowerPAD™(DRC)packagemeasuring3x3-mm.ThePMP3038circuitwasdesignedforatorchorruggedflashlight.Mosttorchapplicationsstillusealkalinebatterieswithacommonconfiguration
Key Features• Buck-boostconvertertopology• Idealforbatteryapplications• 1.8-Aoutputcapability• Autobuck-boostmodeswitching• DualLEDbrightnesslevels• Operatesdownto1.2V
Web LinksDatasheets, user’s guides, samples:www.ti.com/sc/device/TPS63000
PMP3038 Schematic
Design Specifications
Parameter Minimum Maximum Unit
Input voltage 1.2 5 VDC
Output voltage — 5 Volts
Output current 300 600 mAmp
Switch frequency — 1.5 MHz
+
U1TPS63000DRC
S1
NO
1.5V x 2BAT
C310µF
C41000pF
C122µF
C222µF
D17090 XR-E
THERMALPADC6DNP
R249.9K
R512.7K
R30.3
R40.3
R649.9
S2NC
NOD2LM4040D2.048V
R110K
NCL2
VOUT
PGND
FB
GND
4
5
8
7
6
2
1
3
10
9
11
L1
VIN
VINA
SYNC/PS
EN1PwPd
L12.2µH
oftwoorthreecellsinseriesthathaveamaximumvoltageof5V.Duringoperation,theVBATdropsbelowtheVfoftheLED,andtheTPS63000automaticallyswitchesfrombuckmodetoboostmodetocreatetheconstantcurrentneededfortheLED.TheTPS63000canboostfromvoltagesaslowas1.2V.AswitchthatbringsR4intooroutofthefeedbackloopprovidesadimmingmechanismfortheflashlighttotogglebetween300and600mA.
Formorereferencedesigns,see:www.ti.com/powerreferencedesigns
TexasInstruments2Q2010 LED Reference Design Cookbook
Low-Voltage Buck Boost for LED Torch
TPS63000 PMP3038
43
➔
Low-Voltage Buck Boost for LED Torch
TPS63000 PMP3038Output Current Graphs with DC Coupling
Efficiency Curve for IO = 0.32 A and IO = 0.62 A Turn On with 0.63 A
Control Loop Response Graphs
Output current with VIN = 3 V.
Control loop response with 0.63 A.
Output current with VIN = 4 V.
Control loop response with 0.32 A.
Efficiency.
LED Reference Design Cookbook TexasInstruments2Q2010
Boost Driver with Integrated Power Switch
TPS61500
44
➔
Description TheTPS61500isamonolithicswitchingregulatorwithanintegrated3-A,40-Vpowerswitch.Itisanidealdriverforhigh-brightness1-or3-WLEDs.Thedevicehasawideinput-voltagerangetosupportapplicationswithinputvoltagefrommulticellbatteriesorregulated5-Vto12-Vpowerrails.
TheLEDcurrentissetwithanexternalsenseresistor,R3,andwithfeedbackvoltagethatisregulatedto200mVbyacurrent-modePWMcontrolloop,asshownintheschematicbelow.ThedevicesupportsanalogandpurePWMdimmingmethodsforLEDbrightnesscontrol.ConnectingacapacitortotheDIMCpinconfiguresthedevicetobeusedforanalogdimming,andtheLEDcurrentvariesinproportiontothedutycycleofanexternalPWMsignal.FloatingtheDIMCpinconfiguresthe
Key Features• Supportsboosttopology• Integrated3-A40-Vpowerswitch• SupportsPWMorAMdimming• Protectionfeatures: •Pulsebypulse •Thermalshutdown
Web LinksDatasheets, user’s guides, samples:www.ti.com/sc/device/TPS61500
Typical Application Schematic
LED Current vs. Input Supply and LED Number
Input Supply 5 V 12 V
LED number 4 1000 mA 2000 mA
LED number 6 600 mA 1200 mA
LED number 8 450 mA 1000 mA
Note: Assumption that LED forward voltage is 3.5V, and TPS61500’s conversion efficiency is 85%.
TPS61500
SW
SW
OVP
FB
PGND
PGND
PGND
VIN
EN
COMP
DIMC
FREQ
S3
AGND
PWM
VIN 5V L1 D1
C1 C2DL13W LED
DL2
DL3
DL4
C4R4
R1
R2
R3
C3
C5
ICforpurePWMdimming,withtheaverageLEDcurrentbeingthePWMsignal’sdutycycletimesasetLEDcurrent.
Thedevicefeaturesaprogrammablesoft-startfunctiontolimitinrushcurrentduringstart-upandhasotherprotectionfeaturesbuiltin,suchaspulse-by-pulseovercurrentlimiting,overvoltageprotectionandthermalshutdown.TheTPS61500isavailableina14-pinHTSSOPpackagewithPowerPAD™.
Formorereferencedesigns,see:www.ti.com/powerreferencedesigns
TexasInstruments2Q2010 LED Reference Design Cookbook
Boost Driver with Integrated Power Switch
TPS61500
45
➔
Boost Driver with Integrated Power Switch
TPS61500Efficiency vs. Output Current
PWM Dimming Application Circuit: Circuit for the TPS61500 to Perform Analog Dimming Using an Injected Analog Signal
Analog Dimming by External DAC: Pure PWM Dimming Method
LED Current vs. Input Supply and LED Number
Input Supply 5 V 12 V
LED number 4 1000 mA 2000 mA
LED number 6 600 mA 1200 mA
LED number 8 450 mA 1000 mA
Note: Assumption that LED forward voltage is 3.5V, and TPS61500’s conversion efficiency is 85%.
TPS61500
SW
SW
OVP
FB
PGND
PGND
PGND
VIN
EN
COMP
DIMC
FREQ
SS
AGND
DSP orµcontroller PWM
0 - 1.229V
VIN 5V L1 D1
C1
DL13W LED
DL2
DL3
DL4C4 C5
≥100nFR4
R1
R2
R3C3
OFF
ON
DAC
TPS61500
SW
SW
OVP
FB
PGND
PGND
PGND
VIN
EN
COMP
DIMC
FREQ
SS
AGND
PWM
VIN 5V L1 D1
C1
C2
DL13W LED
DL2
DL3
DL4C4
R4
R1
R2
R1
R2
R3
Q1
Q2
PWM
C3
LED Reference Design Cookbook TexasInstruments2Q2010
1.5-A White LED Driver for Notebooks
TPS61180/1/2
1.5-A White LED Driver for Notebooks
TPS61180/1/2
46
➔
Description TheTPS61180/1/2ICsprovidehighlyintegratedsolutionsformedia-sizeLCDbacklighting.Thesedeviceshaveabuilt-in,high-efficiencyboostregulatorwithanintegrated1.5-A/40-VpowerMOSFET.Thesixcurrent-sinkregulatorsprovidehigh-precisioncurrentregulationandmatching.Intotal,thedevicecansupportupto60whiteLEDs(WLEDs).Inaddition,theboostoutputautomaticallyadjustsitsvoltagetotheWLEDforwardvoltagetoimproveefficiency.
Thedevicessupportpulse-width-modulation(PWM)brightnessdimming.Duringdimming,theWLEDcurrentisturnedon/offatthedutycycle,andfrequencyisdeterminedbythePWMsignalinputontheDCTRLpin.OnepotentialissueofPWMdimmingisaudiblenoisefromtheoutputceramiccapacitors.TheTPS61180/1/2familyisdesignedtominimizethisoutputACripple
overvoltageprotection,softstartingandthermalshutdown.
TheTPS61180ICrequiresanexternal3.3-VICsupply,whiletheTPS61181/2ICshaveabuilt-inlinearregulatorfortheICsupply.Allthedevicesareina3-x3-mmQFNpackage.
Web LinksDatasheets, user’s guides, samples:www.ti.com/sc/device/TPS61180,www.ti.com/sc/device/TPS61181orwww.ti.com/sc/device/TPS61182
Typical Application Schematic
acrosswidedimming-duty-cycleandfrequencyranges,thereforereducingtheaudiblenoise.
TheTPS61180/1/2ICsprovideadriveroutputforanexternalPFETconnectedbetweentheinputandinductor.Duringshort-circuitorovercurrentconditions,theICsturnofftheexternalPFETanddisconnectthebatteryfromtheWLEDs.ThePFETisalsoturnedoffduringICshutdown(trueshutdown)topreventanyleakagecurrentfromthebattery.Thedevicealsointegrates
Design Specifications
Parameter Minimum Typical Maximum Unit
Input voltage 4.7 — 24 Volts
Output voltage 15 — 38 Volts
Output ripple — — 200 mVPP
Output current 0 — 150 mA
Switching frequency — 1000 — kHz
Also Available Soon
Device Switch Channels Current per Channel LEDs per Channel
TPS61183 2.0 A 6 30 mA Up to 10
TPS61185 2.0 A 8 25 mA Up to 10
TPS61195 2.5 A 8 30 mA Up to 12
Preview products are listed in bold blue.
5V to 24V
EN
PWM Dimming
C14.7µF
C31µF
C40.1µF
R162kΩ
R251Ω
R3100kΩ
Optional
Q1
L110µH
C24.7µFD1 10 WLED in series, 120mA Total
TPS61181/2
SWFault
VO
IFB1
IFB2
IFB3
IFB4
IFB5
IFB6
PGND
GND
VBAT
CIN
DCTRL
EN
ISET
NEW!
TexasInstruments2Q2010 LED Reference Design Cookbook
1.5-A White LED Driver for Notebooks
TPS61180/1/2
47
➔
1.5-A White LED Driver for Notebooks
TPS61180/1/2Switching Waveforms Efficiency vs. PWM Duty
Start-up Waveforms Output Current vs. Dimming Duty Cycle
Output Ripple at PWM Dimming Output Ripple at PWM Dimming
Design Specifications
Parameter Minimum Typical Maximum Unit
Input voltage 4.7 — 24 Volts
Output voltage 15 — 38 Volts
Output ripple — — 200 mVPP
Output current 0 — 150 mA
Switching frequency — 1000 — kHz
Also Available Soon
Device Switch Channels Current per Channel LEDs per Channel
TPS61183 2.0 A 6 30 mA Up to 10
TPS61185 2.0 A 8 25 mA Up to 10
TPS61195 2.5 A 8 30 mA Up to 12
Preview products are listed in bold blue.
LED Reference Design Cookbook TexasInstruments2Q2010
Multichannel PWM Power Driver for Power LED Applications
DRV9812
Multichannel PWM Power Driver for Power LED Applications
DRV9812
48
➔
Description TheDRV9812,whichhasawideinputvoltageofupto50V,isasynchronousmultichannelPWMpowerdriverforLEDapplications.Itcanbeconfiguredasbuck,boostorbuck/boost,dependingontheapplicationrequirements,andcandrive4independentLEDstringswithupto15powerLEDsinseriesperstring.ItcanalsoprovideDC,sine-wave,oranyotherkindofdesiredcurrenttodriveLEDsbasedonaPWMcontrolalgorithmfromanexternalMCUcontroller.
Becauseoftheintegratedlow-RDS(on)MOSFETsandintelligentgate-drivedesign,theefficiencyoftheDRV9812canbeashighas96%.Thedeviceoffersintegrated,on-chipsafeguards
TheDRV9812hasaunique,independentsupplypinforeachchannel,enablingittosupportmultipleoutputswithdifferentpower-supply-voltagerequirementsorwithmixedconvertertopologies.Web LinksDatasheets, user’s guides, samples:www.ti.com/sc/device/DRV9812
DRV9812 Typical Application Schematic in Buck Configuration
againstawiderangeoffaultconditionssuchasshortcircuitsandovercurrentandundervoltageconditions.Italsooffersintegratedtwo-stagethermalprotection.Aprogrammableovercurrentdetectorprovidesanadjustablecycle-by-cyclecurrentlimittomeetdifferentpowerrequirements.
Design Specifications
Parameter Minimum Typical Maximum
Input Voltage (V) 2 — 50
Output Voltage (V) 0 — 49.5
Gate Voltage (V) 11.4 12.3 13.2
Peak Output Current (A) — — 5
RMS Output Current (A) — — 2.5
Switching Frequency (kHz) — 10 to 500 1000
Real-Time MCU(TMS320F2802x/3x,
C2000™, etc.)
PWM
12VVIN
Up to 50V
VLED
ADC
DRV9812
DH_A
DH_B
DH_C
DH_D
BST_A
DL_A
BST_B
DL_B
BST_C
DL_C
BST_D
DL_D
VREG
GV
DD
_A
AG
ND
GN
D
GN
D_A
GN
D_B
GN
D_C
GN
D_D
GV
DD
_B
GV
DD
_C
GV
DD
_D
VD
D
RESET_AB
RESET_CD
PWM_A
PWM_B
PWM_C
PWM_D
FAULT
OTW
OC_ADJ
M1
M2
M3
AMP AMP AMP AMP
Formorereferencedesigns,see:www.ti.com/powerreferencedesigns
NEW!
TexasInstruments2Q2010 LED Reference Design Cookbook
Multichannel PWM Power Driver for Power LED Applications
DRV9812
49
➔
Multichannel PWM Power Driver for Power LED Applications
DRV9812
PWM Linearity Curve Efficiency Curve
DRV9812 Typical Application Schematic in Boost Configuration
Design Specifications
Parameter Minimum Typical Maximum
Input Voltage (V) 2 — 50
Output Voltage (V) 0 — 49.5
Gate Voltage (V) 11.4 12.3 13.2
Peak Output Current (A) — — 5
RMS Output Current (A) — — 2.5
Switching Frequency (kHz) — 10 to 500 1000
PWM
12V
AMP
VIN
VLED Up to 50V
AMP AMP AMP
ADC
DRV9812
DH_A
DH_B
DH_C
DH_D
BST_A
DL_A
BST_B
DL_B
BST_C
DL_C
BST_D
DL_D
VREG
GV
DD
_A
AG
ND
GN
D
GN
D_A
GN
D_B
GN
D_C
GN
D_D
GV
DD
_B
GV
DD
_C
GV
DD
_D
VD
D
RESET_AB
RESET_CD
PWM_A
PWM_B
PWM_C
PWM_D
FAULT
OTW
OC_ADJ
M1
M2
M3
Real-Time MCU(TMS320F2802x/3x,
C2000™, etc.)
LED Reference Design Cookbook TexasInstruments2Q2010
TPS61161
L1: TDK VLCF5020T-220MR75-1C1: Murata GRM188R61E105KC2: Murata GRM21BR71H105KD1: ONsemi MBR0540T1
VIN
CTRL
COMP
SW
FB
RsetR10Ω
20mA
C21µF
C11µF
L122µH
GND
D1
On/OffDimmingControl
VI 3V to 18V
C3220nF
Small LCD Backlight with Digital and PWM Dimming
TPS61160/1
Small LCD Backlight with Digital and PWM Dimming
TPS61160/1
50
➔
Description Witha40-VintegratedswitchFET,theTPS61160/1isaboostconverterthatdrivesupto10LEDsinseries.Theboostconverter,whichallowsfortheuseofhigh-brightnessLEDsingenerallighting,runsatafixedfrequencyof1.2MHzwitha0.7-Aswitch-currentlimit.
Asshownintheschematicbelowofatypicalapplication,thedefaultwhite-LED(WLED)currentissetwiththeexternalsenseresistor,RSET,andthefeedbackvoltageisregulatedto200mV.TheLEDcurrentcanbecontrolledviatheone-wiredigitalinterface(EasyScale™protocol)throughtheCTRLpin.Alternatively,aPWMsignalcanbeappliedtothe
Ordering Information1
TA Open LED Protection (typical) Package2 Package Marking
26 V TPS61160DRV BZQ–40°C to 85°C
38 V TPS61161DRV BZR
1For most current package and ordering information: www.ti.com/sc/device/TPS61160.2The DRV package is available in tape and reel. Add R suffix (TPR61160DRVR) to order quantities of 3,000 parts per reel or add T suffix
(TPS61160DRVT) to order 250 parts per reel.
Key Features• Efficientboosttopology• Integrated40-Vpowerswitch• Drivesupto10LEDs• PWMdimmable• 200-mVVREF• Noaudiblenoise
Web LinksDatasheets, user’s guides, samples:www.ti.com/sc/device/TPS61160
Typical Application Schematic
CTRLpinsuchthatthedutycycledeterminesthefeedbackreferencevoltage.IneitherdigitalorPWMmode,theTPS61160/1doesnotprovideLEDcurrentinburst;therefore,itdoesnotgenerateaudiblenoiseontheoutputcapacitor.Forprotectionduringopen-LEDconditions,theTPS61160/1hasintegratedcircuitrytopreventtheoutputfromexceedingtheabsolutemaximumratings.
Formorereferencedesigns,see:www.ti.com/powerreferencedesigns
TexasInstruments2Q2010 LED Reference Design Cookbook
Small LCD Backlight with Digital and PWM Dimming
TPS61160/1
51
➔
Small LCD Backlight with Digital and PWM Dimming
TPS61160/1
Ordering Information1
TA Open LED Protection (typical) Package2 Package Marking
26 V TPS61160DRV BZQ–40°C to 85°C
38 V TPS61161DRV BZR
1For most current package and ordering information: www.ti.com/sc/device/TPS61160.2The DRV package is available in tape and reel. Add R suffix (TPR61160DRVR) to order quantities of 3,000 parts per reel or add T suffix
(TPS61160DRVT) to order 250 parts per reel.
Efficiency vs. Output Current
PWM Dimming Output Ripple
PWM Dimming Linearity: FB Voltage vs. PWM Duty Cycle
LED Reference Design Cookbook TexasInstruments2Q2010
Small LCD Backlight from LDO
TPS7510x
52
➔
Description TheTPS7510xlinearlow-dropout(LDO)LEDcurrentsourceisoptimizedforlow-powerLEDbacklightingapplicationssuchaskeypadsandnavigationpads.ThedeviceprovidesaconstantcurrentforuptofourunmatchedLEDsorganizedintwobanksoftwoLEDseachinacommon-cathodetopology.Withoutanexternalresistor,thecurrentsourcedefaultstothefactory-programmable,presetcurrentlevelwith±0.5%accuracy(typical).Anoptionalexternalresistorcanbeusedtosetinitialbrightnesstouser-programmablevalueswithhigheraccuracy.BrightnesscanbevariedfromofftofullbrightnessbyinputtingaPWMsignaloneachenablepin.Eachbankhasindependentenableandbrightnesscontrol,butthecurrentsofallfourchannelsarematchedconcurrently.Theinput-supplyrangeisideallysuitedforsingle-cellLi-Ionbatterysupplies,andtheTPS7510xcanprovideupto25mAperLED.Nointernalswitchingsignalsareused,eliminatingtroublesomeelectromagneticinterference(EMI).The
Device Specifications
Device VIN LEDs ∆IDX MAX VDO ∆IDX Packages
TPS7510x 2.5 V to 5.5 V 2 mm x 2 mm 25 mA 28 mV ±2% WCSP, DSK
TPS7510x Package Options
TPS7510xisofferedinanultra-small,9-ball,0.4-mmball-pitchwaferchip-scalepackage(WCSP)anda2.5x2.5-mm,10-pinSONpackage,yieldingaverycompacttotalsolutionsizeidealformobilehandsetsandportablebacklightingapplications.
Atfirstglance,usingalinearLDOcircuittodriveLEDsmayseemimpractical,giventhelinearregulator’sreputationforlowefficiency.However,theefficiencyofLDOsisoftenmisunderstood.LDOefficiencyisentirelybasedontheinput/output-voltageratio;therefore,theefficiencyofdrivingwhiteLEDs(WLEDs)canbequitehigh.Forexample,drivinga3-VWLEDfroma3.6-VLi-Ion-batteryinputtranslatesintoanLEDefficiencyof83%.
Figure 1showsatypicalapplicationfortheTPS75105.NotethatthisdevicerequiresnoexternalcomponentstodrivetheWLEDs.Thetotalsolutionisextremelysmallandverycosteffective.
Figure 2showstheTPS75105efficiencydataforseveraldifferentWLEDforwardvoltagesovertheLi-Ionbattery’srange.TheLEDefficiencyfortheTPS75105iscomparabletoorbetterthanthatofotherWLED-driversolutions.
Figure 3demonstratestheLEDefficiencyoftheTPS7510xovertheLi-Ionbattery’sdischargecurve.Theaverageefficiencyfortheentiredischargerangeisover80%forallthreecurves,andupto90%whenVLED=3.3V.
Key Features• Drivesfourconstantcurrentoutputs• PWMdimmable• 0.5%currentaccuracy• 25mAperLED• Ultra-smallsizeballpitchpackaging 83%efficientsolution
Web LinksDatasheets, user’s guides, samples:www.ti.com/sc/device/TPS75105
Formorereferencedesigns,see:www.ti.com/powerreferencedesigns
TexasInstruments2Q2010 LED Reference Design Cookbook
Small LCD Backlight from LDO
TPS7510x
53
➔
Small LCD Backlight from LDO
TPS7510x
Figure 2 - Efficiency Data
Figure 3 - LED Efficiency
Figure 1 - Typical Application
D1A
D2A
D1B
D2B
VIN
GND
ENA
ENB
ISET3.6VBattery
OFF
ON
OFF
Optional
ON
LED Reference Design Cookbook TexasInstruments2Q2010
TPS61165
L1: TOKO #A915_Y-100MC1: Murata GRM188R61A475KC2: Murata GRM188R61E105KD1: OSRAM LW-W 5SM
VIN
CTRL FB
COMP
SW
RsetR57Ω
350mA
C21µF
C11µF
L110µH
GND
D1
On/OffDimmingControl
VIN 5V
C3220nF
Medium-Size LCD Backlight
TPS61165
54
➔
Description Witha40-VintegratedswitchFET,theTPS61165isaboostconverterthatdrivesuptotenLEDsinseries.Theboostconverter,whichallowsfortheuseofhigh-brightnessLEDsingenerallighting,runsatafixedfrequencyof1.2MHzwitha1.2-Aswitch-currentlimit.
Asshownintheschematicbelowofatypicalapplication,thedefaultwhite-LED(WLED)currentissetwiththeexternalsenseresistor,RSET,andthefeedbackvoltageisregulatedto200mV.TheLEDcurrentcanbecontrolledviatheone-wiredigitalinterface(EasyScale™protocol)throughtheCTRLpin.Alternatively,aPWMsignalcanbeappliedtotheCTRLpinsuchthatthedutycycle
Key Features• Boostconverterforhighefficiency• 40-Vintegratedpowerswitch• Drivesupto10LEDs• LowVrefforhighefficiency• Onewiredigitalinterface• PWMdimming• Noaudiblenoise
Web LinksDatasheets, user’s guides, samples:www.ti.com/sc/device/TPS61165
Typical Application Schematic
LED Current vs. Input Supply and LED Number
Input Supply 3 V 5 V 12 V
LED number 3 200 mA 350 mA 820 mA
LED number 6 100 mA 175 mA 410 mA
LED number 8 70 mA 120 mA 300 mA
Note: Assumption that LED forward voltage is 3.5 V, and TPS61165’s conversion efficiency is 80%.
determinesthefeedbackreferencevoltage.IneitherdigitalorPWMmode,theTPS61160/1doesnotprovideLEDcurrentinburst;therefore,itdoesnotgenerateaudiblenoiseontheoutputcapacitor.Forprotectionduringopen-LEDconditions,theTPS61165hasintegratedcircuitrytopreventtheoutputfromexceedingtheabsolutemaximumratings.
TheTPS61165isavailableinaspace-saving,2x2-mmQFNpackagewithathermalpad.
Formorereferencedesigns,see:www.ti.com/powerreferencedesigns
TexasInstruments2Q2010 LED Reference Design Cookbook
Medium-Size LCD Backlight
TPS61165
55
➔
Medium-Size LCD Backlight
TPS61165Efficiency vs. Output Current
PWM Dimming Linearity: FB Voltage vs. PWM Duty Cycle
PWM Dimming Output Ripple
Startup
LED Reference Design Cookbook TexasInstruments2Q2010
Large-LCD Backlight Driver
TPS61195
56
➔
Description TheTPS61195provideshighlyintegratedsolutionsforlarge-LCDbacklights.Thisdevicehasabuilt-in,high-efficiencyboostregulatorwithanintegrated2.5-A,50-VpowerMOSFET.Theeightcurrent-sinkregulatorsprovidehigh-precisioncurrentregulationandmatching.Intotal,thedevicecansupportupto96whiteLEDs(WLEDs).Inaddition,theboostoutputautomaticallyadjustsitsvoltagetotheWLEDforwardvoltagetoimproveefficiency.
TheTPS61195supportsmultiplebrightness-dimmingmethods.DuringdirectPWMdimming,theWLEDcurrentisturnedon/offatthedutycycle,andthefrequencyisdeterminedbyanintegratedPWMsignal.InPWM-dimmingmode,thefrequencyofthissignalisresistor-programmable,whilethedutycycleiscontrolledfromanexternalPWMsignalinputfromaPWMpin.Inanalogmixeddimmingmodes,theinputPWMduty-cycleinformationistranslatedintoananalogsignaltocontroltheWLEDcurrentsignallinearlyoverabrightnessareaof12.5to100%.ThedevicealsoallowsPWM
TPS61195 Schematic
LED Current vs. Input Supply and LED Number
Parameter Minimum Maximum Unit
Input voltage 4.0 24 Volts
Output voltage 16 48 Volts
Number of channel — 8 —
Output current 0 0.32 Amp
Switching frequency 600 KHz 1 MHz —
TPS61195
VIN
4v ~ 24V
C14.7µF
C20.1µF
R240KΩ
R165KΩ
R4953KΩ
R646.4KΩ
R51M
C31µF
Up to 48VD1
R3523KΩ
200 Hz
L110µH
* 510Kohms resistance to ground.
SEL
VDDIO
Open
GND
R*
Interface
SMBus
PWM
PWM
PWM
DimmingMode
PWM
D-PWM
PWM
Mix Mode
AGND
VIN VIN
VDDIO PGND1PGND2
OVP
FDIM
IFB1IFB2IFB3IFB4IFB5IFB6IFB7IFB8
EN
DPWM
FDPWM
FSW
SEL
ISET
SDA
SCL
dimmingtobeaddedwhentheanalogsignalkeepstheWLEDcurrentdownto12.5%.Below12.5%,theanalogsignalwillbetranslatedintoPWMduty-cycleinformationtocontroltheon/offoftheWLEDcurrentandtoaveragetheWLEDcurrentdownto1%.
TheTPS61195integratesovercurrentprotection,short-circuitprotection,softstartandovertemperatureshutdown.Thedevicealsoprovidesprogrammableoutputovervoltageprotection,andthethresholdisadjustedbyanexternalresistor/dividercombination.
TheTPS61195hasabuilt-inlinearregulatorfortheICsupplyandisavailableina4x4-mmQFNpackage.
Key Features• Boostregulatorwithintegrated3-A
50-Vpowerswitch• Eightcurrent-sinkregulatorsfor
precisionintensitycontrol• Highefficiencythroughautomatic
VOUTtoLEDVforward• PWMdimming• Multipleprotectionfeatures: •Overcurrent •Shortcircuit •Overtemperature
Web LinksReference designs:www.ti.com/powerreferencedesigns
Datasheets, user’s guides, samples:www.ti.com/sc/device/TPS61195
TexasInstruments2Q2010 LED Reference Design Cookbook
57
➔
Large-LCD Backlight Driver
TPS61195Dimming Efficiency VIN = 10.8 V; 9s8p
PWM Dimming Current Linearity VIN = 10.8 V Mixed Mode Dimming Waveform: 8% Brightness Mode
Mix Mode Dimming Current Linearity VIN = 10.8 V
Mixed Mode Dimming Waveform: 20% Brightness— Pure Analog
Large-LCD Backlight Driver
TPS61195
LED Reference Design Cookbook TexasInstruments2Q2010
24-Channel, 12-Bit PWM LED Driver
TLC5951
24-Channel, 12-Bit PWM LED Driver
TLC5951
58
➔
Description TheTLC5951isa24-channel,constant-currentsinkdriver.Eachchannelhasanindividuallyadjustable,4096-step,pulse-width-modulation(PWM)grayscale(GS)brightnesscontrol(BC)and128-stepconstant-currentdotcorrection(DC).TheDCadjustsbrightnessdeviationbetweenchannelsandotherLEDdrivers.Theoutputchannelsaregroupedintothreegroupsofeightchannels.Eachchannelgrouphasa256-stepglobalBCfunctionandanindividualGSclockinput.
GS,DCandBCdataareaccessibleviaaserial-interfaceport.DCandBCcanbeprogrammedviaadedicated
Web LinksDatasheets, user’s guides, samples:www.ti.com/sc/device/TLC5951
Typical Application Schematic (used when DCSIN/DCSCK Ports are used)
serial-interfaceport.TheTLC5951hasthreeerror-detectioncircuits:LEDopendetection(LOD),LEDshortdetection(LSD)andathermal-errorflag(TEF).LODdetectsabrokenordisconnectedLED,LSDdetectsashortedLED,andTEFindicatesanovertemperaturecondition.
Formorereferencedesigns,see:www.ti.com/powerreferencedesigns
Design Specifications
Parameter Test Conditions Minimum Typical Maximum Unit
Input voltage — 3.0 — 5.5 Volts
Output Voltage OUTR/G/B 0 to 7 3.0 — 17 Volts
Dot correction/global brightness control
— — 7/8 — Bits
Output current — 35 40 45 mA
Grayscale clock frequency — — — 33 MHz≈
≈≈
≈≈
≈
VLED
RIREF
GND
TLC5951ICn
OUTR0/G0/B0 OUTR7/G7/B7
VCC
GND
GSSIN
GSSCK
GSLAT
XBLNK
GSCKR
GSCKG
GSCKB
GSSIN
GSSOUT
DCSOUT
VCC
GND
GSSCK
GSLAT
DCSIN
DCSCK
XBLNK
GSCKR
GSCKG
GSCKB
IREF
GSSIN
READ DATA
DCSIN
READ DATA
DCSCK
GSController
DC/BC/FCController
VLED
GND GND
≈
6
RIREF
GND
TLC5951IC1
OUTR0/G0/B0 OUTR7/G7/B7
VCC
GND
GSSIN
GSSOUT
DCSOUT
VCC
GND
GSSCK
GSLAT
DCSIN
DCSCK
XBLNK
GSCKR
GSCKG
GSCKB
IREF
NEW!
TexasInstruments2Q2010 LED Reference Design Cookbook
24-Channel, 12-Bit PWM LED Driver
TLC5951
59
➔
Output Current vs. Output Voltage Dot-Correction (DC) Linearity (IOLCMax with Lower Range)
Dot-Correction (DC) Linearity (IOLCMax with Upper Range) Constant-Current Output-Voltage Waveforms (Red Group)
Constant-Current Error vs. Ambient Temperature (Channel-to-Channel, Red Group)
Global-Brightness-Control (BC) Linearity (IOLCMax with Upper Range)
LED Reference Design Cookbook TexasInstruments2Q2010
24-Channel, Constant-Current LED Driver
TLC5952 with Global Brightness Control
24-Channel, Constant-Current LED Driver
TLC5952 with Global Brightness Control
60
➔
Description TheTLC5952isa24-channel,constant-currentsinkdriver.Eachchannelcanbeturnedon/offwithinternalregisterdata.Theoutputchannelsaregroupedintothreegroupsofeightchannelseach.Eachchannelgrouphasa128-stepglobal-brightness-control(BC)function.
Bothon/offdataandBCarewritableviaaserialinterface.Themaximumcurrentvalueofall24channelsissetbyasingleexternalresistor.TheTLC5952hasthreeerror-detectioncircuits:LEDopendetection(LOD),LEDshortdetection(LSD)anda
Web LinksDatasheets, user’s guides, samples:www.ti.com/sc/device/TLC5952
Typical Application Schematic
thermal-errorflag(TEF).Theerrordetectionisreadviaaserialinterface.LODdetectsabrokenordisconnectedLED,LSDdetectsashortedLED,andTEFindicatesanovertemperaturecondition.
Formorereferencedesigns,see:www.ti.com/powerreferencedesigns
Design Specifications
Parameter Test Conditions Minimum Typical Maximum Unit
Input voltage — 3.0 — 5.5 Volts
Output Volatage OUTR/G/B 0 to 7 3.0 — 17 Volts
Global brightness control — — 7 — Bits
Output current — 29 32 35 mA
Data shift clock frequency — — — 35 MHz
≈≈
≈≈
+
TLC5952IC1
SIN
SCLK
LAT
BLANK
IREF
OUTR0
VLED
OUTB7
SOUT
VCC
GND
VCC
3
RIREF
DATA
SCLK
LAT
BLANK
ERRORREAD
RIREF
TLC5952ICn
SIN
SCLK
LAT
BLANK
IREF
OUTR0 OUTB7
SOUT
VCC
GND
VCC
Controller
NEW!
TexasInstruments2Q2010 LED Reference Design Cookbook
24-Channel, Constant-Current LED Driver
TLC5952 with Global Brightness Control
61
➔
24-Channel, Constant-Current LED Driver
TLC5952 with Global Brightness ControlOutput Current vs. Output Voltage (Red and Green Groups) Constant-Current Error vs. Output Current
(Channel-to-Channel, Red Group)
Constant-Current Error vs. Ambient Temperature (Channel-to-Channel, Red Group)
Constant-Current Output-Voltage Waveforms (red group)
Output Current vs. Output Voltage (Blue Group) Global Brightness-Control (BC) Linearity (Red and Green Groups)
LED Reference Design Cookbook TexasInstruments2Q2010
16-Channel LED Driver with Load-Switch Dimming Control
TLC59116
16-Channel LED Driver with Load-Switch Dimming Control
TLC59116
62
➔
Description TheTLC59116isa16-channel,constant-currentLEDdrivercapableofsinkingupto100mAperchannel.Externalcurrent(IOUT)isprogrammedbyanexternalresistor(REXT).ThedevicehasaserialI2Cinterfaceandmultiplefunctions,someofwhichallowindividualpinblinkingandglobalbrightnesscontrol.InternalbrightnessandblinkingareaccomplishedbyusingtheTLC59116’sinternaloscillatortocreatedigitaldimming,commonlyreferredtoaspulse-width-modulation(PWM)dimming.TheTLC59116alsohasaninternalregisterthatcanbesettochangethebrightness“gain”from99.2%(thedefault)to8.3%.ThisreferencedesignallowsanyoftheseoptionstobeusedbutalsohasanaddedloadswitchformanipulatingtheREXTtochangebrightness.Thismethodcanalsobeusedtoproduceblinkingbetweendifferentbrightnesslevels,whichcannotbeachievedwiththeTLC59116alone.
LEDbrightnesscanbeprogrammedtochangedependingonthetimeofdayorthelevelofambientlight.LEDdimmingcanbeaccomplishedthroughanalogordigitalmethods.Inanalogdimming,thecurrentthroughtheLEDisreduced.Indigital(PWM)dimming,theLEDisturnedonandoffatahighfrequency.ThehumaneyeintegratestheonandoffbrightnessinsuchawaythattheLEDappearstodim.ChangingthefrequencyanddutycycleofthePWMsignalwillimpactthebrightness.Forexample,anLEDapplicationthatrequires40mAtobeatfullbrightnesswillbeat50%brightnessiftheanalogdimmingissetforadrivecurrentof20mAorifthePWMoperatesata50%dutycycle.Figure1showsthedifferencebetweenanalogandPWMdimming.FortheTLC59116LEDdriver,IOUTissetbytherelationshipbetweenthe
whichishigherthanthe0.9Vrequiredforoperation.
TheTPS22901’sdefaultis“on”anditsresistorisusedtocomputeIOUT,resultingin80mA.WhentheTPS22901isoff(theswitchisopen),theresultingcurrentchangesto40mA.ThehostMSP430controllercaneasilycontrolthefrequencyofthedim/full-brightnesstiming.TheTPS22900(dualloadswitch)canprovideuptofourbrightnesslevels.
Web LinksDatasheets, user’s guides, samples:www.ti.com/sc/device/TLC59116
externalresistorandtheREXTpin’sreferencevoltage(VREXT),asshowninequation1.
(1)IOUT=VREXT/REXTx15
Equation2solvesforREXT.
(2)REXT=VREXT/IOUTx15
ThedefaultVEXTvalueis1.25V.Theactualvalueisdependentonthebrightness“gain”setbytheuserviatheTLC59116’sinternalregister.Asaresult,anymanipulationofthecurrentbasedonREXTisstilldependentonthegain.
ChangingREXTchangestheresultingcurrent.Forexample,ifIOUTwassetto80mA,REXTwouldbe
(3)REXT=1.25V/80mAx15=234.
Similarly,a40-mAcurrentwouldresultinanREXTof468W.
Figure2showsabasicconfigurationforanLEDapplicationthatrequires40mAperchannel.The5-Vsupplyissteppeddownto3.3VbyasimpleLDOtodrivetheMSP430™controllerandtheTLC59116LEDdriver.The5-VsupplypowerstheLEDsdirectly.
BrightnesscontrolisenabledbyaddingaresistorinparallelwithREXT.Addinganother468-WresistorallowsIOUTtobedoubledfrom40mAto80mA.UsinganavailableGPIOlinefromtheMSP430totheloadswitchallowsthedesignertoaddorremovetheextraresistorasdesired.Figure3showsasimpleimplementationusingaTPS22901loadswitch.
TheTPS22901loadswitchfitsthisdimming-controlapplicationbecausetheRONisbelow100mW(negligibleinserieswith468W)andVREXTis1.25V,
Formorereferencedesigns,see:www.ti.com/powerreferencedesigns
NEW!
TexasInstruments2Q2010 LED Reference Design Cookbook
16-Channel LED Driver with Load-Switch Dimming Control
TLC59116
63
➔
16-Channel LED Driver with Load-Switch Dimming Control
TLC59116
Figure 1. Analog vs. PWM Dimming
Figure 2. Programmable LED Driver
TLC
5911
6
IN
+5V
+3.3V
REXT2468Ω
REXT2468Ω
SHDN
GND
SCL
ON
GND
VIN
VOUT
ON
SDA
RESET
OUTSENSE
TPS7A4533
MS
P43
0
TPS22901
ON = 234Ω = 80mAOFF = 468Ω = 40mA
OUT0
OUT1
OUT13
OUT14
OUT15
VDD
GND
REXT
A0-A3
RESET
SDA
SCL
+3.3V
TLC
5911
6
IN
+5V
+3.3V
REXT2468Ω
SHDN
GND
SCL
ON
SDA
RESET
OUTSENSE
TPS7A4533
MS
P43
0
OUT0
OUT1
OUT13
OUT14
OUT15
VDD
GND
REXT
A0-A3
RESET
SDA
SCL
+3.3V
Figure 3. Analog Dimming/Blinking with a Load Switch
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A042210
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