CookBook6.doc 08/10/2003 Maxim High Voltage Power Supply Reference Designs 1 High Voltage Isolated/Non-Isolated Power Supply Reference Designs Disclaimer: It is up to the individual designer to ensure fitness of purpose when selecting and modifying the attached circuits.
39
Embed
High Voltage Isolated/Non-Isolated Power Supply Reference Designsapplication-notes.digchip.com/003/3-3391.pdf · · 2009-02-08High Voltage Isolated/Non-Isolated Power Supply Reference
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Transcript
CookBook6.doc 08/10/2003
Maxim High Voltage Power Supply Reference Designs 1
High Voltage Isolated/Non-IsolatedPower Supply Reference Designs
Disclaimer:It is up to the individual designer to ensure fitness of purpose when selecting and modifyingthe attached circuits.
CookBook6.doc 08/10/2003
Maxim High Voltage Power Supply Reference Designs 2
Page 29: Single Output 8.25W or 12.5W Synchronous Rectified Isolated Power Supply with Input Hot Swap Protection for Power-Over-Ethernet Power DevicesPage 33: Triple Output 14.2W High Efficiency Isolated Power Supply with Synchronous Rectification and Input Hot Swap Protection for Power-over-Ethernet Power DevicesPage 37: 6W Isolated Power Supply with Hot Swap Protection for Power-over-Ethernet Power Devices
CookBook6.doc 08/10/2003
Maxim High Voltage Power Supply Reference Designs 3
Maxim High Voltage Power Supply Reference Designs 6
Description: -39V to –57V input, +3V/ 3.3W output isolated Flyback converter.This is a continuous flyback converter using a MAX5015 50% max duty cycle current modecontroller.. Although the inductance value is higher than discontinuous design, thetransformer fits on a low cost ER11 core. No auxiliary winding is used to power theMAX5015. An optional snubber (R9-C12) is used to damp a 25MHz ringing on Q1’s (100V)drain terminal. D1 is used to dissipate the leakage inductance spike. C10-L1 at the input limitsthe reflected current, whilst C11 buffers the input line length. R10-C13 optionally damps a100MHz ringing on D3’s anode. L2-C6 network provides additional EMI filtering at theoutput.
SpecificationVin = -57V<Vin<-39VVout = 3V ±5%Iout = 200mA to 1100mAPout = 832mW nominalFrequency = 275kHz fixed.Efficiency ≥75%Output Ripple ≤30mV ppInput protection = noneInput reflected ripple = 5mAOutput Dynamic ≤60mV for 900mA current stepOutput Protection = short circuitHeight = 16mmOperating Temperature = 0°C to +45°C no cooling, still air.Isolation = 500V
Parts List:
CCT ID Value Voltage/TOLFootprint Description & Comments
R1 4K7 5% 0603 63mW Metal Film ResistorR2 3K0 5% 0603 63mW Metal Film ResistorR3 510R 5% 0603 63mW Metal Film ResistorR4 1R0 1% 1206 Vishay CRCW1206 100 1R0 Non-inductiveR5 430R 5% 0603 63mW Metal Film ResistorR6 1K0 5% 0603 63mW Metal Film ResistorR7 8K20 1% 0603 63mW Metal Film ResistorR8 2K00 1% 0603 63mW Metal Film ResistorR9 270R 5% 0603 63mW Metal Film ResistorR10 51R 5% 0603 63mW Metal Film ResistorR11 33R 5% 0603 63mW Metal Film ResistorR12 10K0 5% 0603 63mW Metal Film ResistorC1 4,7nF 50V 0603 X7R Ceramic CapacitorC2 330nF 100V 1210 X7R Ceramic Capacitor TDK C3225X7R2A334MC3 10µF 16V 1210 X5R Ceramic Capacitor TDK C3225X5R1C106MC4 220nF 16V 0603 X7R Ceramic Capacitor TDK C1608X7R1C224MC5 33µF 6,3V 1210 X5R Ceramic Capacitor TDK C3225X5R0J336M
TDK SLF6028-330MR69 Shielded Input filter meeting5mA pp reflected current
L2 >30nH NC PCB Output filter, made with a printed circuit traceU1 MAX5015ESA 110V SO-8 MAXIM PWM Control IC Fsw=275Khz ±10%U2 SFH6156-2 70V DIP4smd Guaranteed CTR at Ie=1mA (Vishay Telefunken)U3 MAX8515EXK 28V SC70-5 1% initial accuracy Low Voltage shunt regulator
TR1
160nH/t 3%TRTER11.5-E001C004
(TDK)
1500VER11SMD
Carrier
See joined specifications.PC44 or 3F3 (or equivalent) Ferrite on 10-pins SMDcoil former. 1500V DC isolation between primaries &secondaryPrimary: 2 layers of 17 turns in series sandwichingthe secondary. Leakage < 1.6%. Ieff=0.19A. L=186µH±5% R<4ΩSecondary : 5 turns Ieff=1.6A L=4.04µH ±5%R<60mΩ
Maxim High Voltage Power Supply Reference Designs 9
Description: +14V to +35V input, +5.25V / 7.35W output isolated Flyback converterA low cost isolated flyback design, using the MAX5053A 50% max duty cycle current modecontroller. Input to output isolation is 1500V. Height above PCB is 10mm.
Specification:Vin = +19.2V<Vin<+35VVout = 5.25V ±2% static conditionsIout = 10mA to 1400mAPout = 7.35W nominalFrequency = 262kHz ±12% fixed.Efficiency = >85%Output Ripple = 100mV ppOutput Dynamic = <150mV for 1000mA current stepOutput Short Circuit Current <2.5AHeight = 10mmOperating Temperature = 0°C to +85°C no cooling, still air.Isolation = 1500V
Parts List:
CCT ID Value Voltage/TOL Footprint Description & Comments
R1 33K 5% 0805 100mW Metal Film ResistorR2 91K 1% 0805 100mW Metal Film ResistorR3 15K 1% 0805 100mW Metal Film ResistorR6 18K 1% 0805 100mW Metal Film ResistorR7 18K 1% 0805 100mW Metal Film ResistorR9 100R 5% 0805 100mW Metal Film Resistor
R10A 0R33 1% 0805 100mW Metal Film Resistor ie MEGGIT CRL 1220R10B 0R33 1% 0805 100mW Metal Film Resistor ie MEGGIT CRL 1220R11 2K4 5% 0805 100mW Metal Film ResistorR17 10,6K 0.1% 0805 100mW Metal Film ResistorR18 Short circuit 1% 0805 100mW Metal Film ResistorR19 82K 0.1% 0805 100mW Metal Film ResistorR20 1K0 5% 0805 100mW Metal Film ResistorR21 15R0 5% 0805 100mW Metal Film ResistorR22 150R 5% 0805 100mW Metal Film ResistorC1 2*330µF 35V D10H10,5 NIC NACZ series 0.52A rms @ 85°C <90mOhmC2 100nF 50V 0805 X7R Ceramic Capacitor
3F3 Ferrite on 8-pins SMD coil former. Gap=88µm(to be conf.) 100µm isolation between primaries &secondaries.Primary: 2 layers of 5 turns in series Outer diam :0,315mm. Around 80mΩ. Leakage < 0,5%. Irms =0.67A.(for reducing the leakage inductance, primaryshould sandwich the secondary)Auxiliary Primary: 10 turns of outer diameter0.187mm around 230mΩ. Wired on topSecondary: 2 layers of 4 turns in ||, wired within theprimary. Outer diameter 0.395mm. Around 10mΩIrms = 1.93A.
Maxim High Voltage Power Supply Reference Designs 12
Description: -48V input, +5V / 250mA output isolated Flyback converterLow cost multi-sourced component, isolated flyback design based on MAX5021 controller.
Specification:Vin = -60V<Vin<-36VVout = 5.0V ± 5% static conditionsIout = 10mA to 250mAPout = 1.25W nominalFrequency = 262kHz ±12% fixed.Efficiency ≥72%Output Ripple = 100mV ppInput reflected ripple = EN5022 Class A (design target, not tested)Output Dynamic ≤30mV OvershootOutput short circuit protection = YesOperating Temperature = -40°C to +70°C no cooling air flowHeight = 20mm maxIsolation = 500V
Parts List:
CCT ID Value VoltageTOL
Outline Description & Comments
R1 100K 5% 0805 100mW Metal Film Resistor - start-up resistorR2 10R 5% 0805 100mW Metal Film Resistor Spike-filterR3 1R0 5% 0805 100mW Metal Film Resistor - non-inductive MEGGIT RL73
R6 43R 5% 0805 100mW Metal Film Resistor - Not fitted if D4 is a 60V model (ieZHCS1006)
R7 430 5% 0805 100mW Metal Film ResistorR8 5K6 5% 0805 100mW Metal Film ResistorR9 6K2 1% 0805 100mW Metal Film Resistor
Maxim High Voltage Power Supply Reference Designs 15
Description: -48V input, +30V 1.2A non-isolated inverterA buck-boost inverter, based upon a MAX5020 current mode controller. A cascodeconnection forms the main switch, and reduces turn-on and turn-off losses to near zero.Losses are restricted to CV2 losses (Q1 Coss, and D6 reverse capacitance).
Specification:Vin = -60V<Vin<-36VVout = 30V ± 5% static conditionsIout = 1.2A maxPout = 36W nominalFrequency = 262kHz ±12% fixed.Efficiency = >90%Output Ripple = 50mV ppOutput short circuit protection = yesHeight <14mmOperating Temperature = +10°C to +70°C no cooling air flow.Isolation = noneLogic controlled shutdown = yes
Parts List:
CCT ID Value VoltageTOL Outline Description
R1 4K7 5% 805 Metal Film Resistor 125mWR2 47K 5% 805 Metal Film Resistor 125mWR3 1K8 5% 1206 Metal Film Resistor 250mW U1's biasingR6 100 5% 805 Metal Film Resistor - 125mWR8 0R18 1% 805 125mW Current Sense Resistor MEGGIT CRL1220R9 0R18 1% 805 125mW Current Sense Resistor MEGGIT CRL1220R10 0R18 1% 805 125mW Current Sense Resistor MEGGIT CRL1220R16 47 5% 805 Metal Film Resistor 125mWR17 47 5% 805 Metal Film Resistor 125mWR18 1K0 5% 805 Metal Film Resistor 125mWR19 8R2 5% 805 Metal Film Resistor 125mW - Damping of Q1's gateR20 8R2 5% 805 Metal Film Resistor 125mW - Damping of Q1's gateR22 10 5% 1206 Metal Film Resistor 250mW - Q1's drain dampingR23 2K7 1% 805 Metal Film Resistor 125mWR24 33K 1% 805 Metal Film Resistor 125mWC1 470nF 100V 9x3.4x6.1HMetallized Polyester B32560-2 S+MC2 100nF 50V 805 X7R Ceramic CapacitorC3 6,8µF 63V D5.0xH11 Rubycon ZL ESR<1,4 ohm @100KHzC4 470pF 50V 805 X7R Ceramic CapacitorC5 330µF 63V 25x12.5 Rubycon Low ESR ZL series 43mOhm MAXC7 470nF 100V 9x3.4x6.1HMetallized Polyester B32560-2 S+MC8 470nF 100V 9x3.4x6.1HMetallized Polyester B32560-2 S+MC9 100nF 100V 1210 X7R Ceramic Capacitor (prefer 1210 over 1206)C10 100nF 100V 1210 X7R Ceramic Capacitor (prefer 1210 over 1206)C11 47nF 100V 805 X7R Ceramic CapacitorC12 10nF 100V 805 X7R Ceramic CapacitorC15 15µF 25V d4H7 Rubycon Low ESR ZL series 940mOhm MAX
CookBook6.doc 08/10/2003
Maxim High Voltage Power Supply Reference Designs 16
Q3 BC856B 80V SOT23-3 PNP 80V 100mAQ4 2N7002 60V SOT23-3 5 Ohm N-MosfetH1 28°c/W Simple heatsink for SMC/SO8 for Q1H2 28°c/W Simple heatsink for SMC/SO8 for D5
L1 10,24µH 3% RM7 La=160nH/turn Ae=44.1mm2Ve= 1.32cm3 material 3F3
L2 20nH 20% Made with a printed circuit trackL3 0,15µH 20% 1210 Murata LQH3C 28mOhm maxL4 47µH 15% 12,7*12,7 MEGGIT SIGMA 3631 series 130mOhm max
D2&D3 MBRA140T3 40V 1A
Other packages, as SOT23-3 or Powermite have evenlower parasitic inductance, which will lower the(normal) voltage overshoot at the off-time. (seeZHCS1000 & CMPSH1-4, or MBRM140T3)
D4 BZV55-C16 16V SOD80-C 500mW Zener
D5&D6 SS3H100 100V SMCGeneral Semiconductor 3A 100V 3nH Schottky withH2 heatsink if only one diode is used, no heatsink iftwo diodes are connected in parallel.
30BQ100 100V SMC or I.R. 3A 100V 3nH Schottky STPS2H100U 100V SMB or 2A 100V 2nH Schottky
CookBook6.doc 08/10/2003
Maxim High Voltage Power Supply Reference Designs 17
Maxim High Voltage Power Supply Reference Designs 20
Description: +48V input, 14.35W multi output isolated high efficiency power supplyA synchronous-rectifier, isolated, forward converter, using the MAX5015 current modecontroller
Maxim High Voltage Power Supply Reference Designs 25
Description: Isolated +48V to 3.3V 7A DC-DC ConverterA single ended isolated forward converter with synchronous rectification using a MAX5052Acurrent mode controller
Specification:Input voltage +40V to +60VDCPower supply dimensions: 1.79" x 0.95" x 0.60"Output voltage: +3.3V ± 2%Output current: 7AOver-voltage 4V ± 5%Over-current and short circuit protectionRemote senseNo damage should occur to the remote sense resistors if the connection of the remote sense isreversed.Isolation voltage, primary to secondary 1500VDC
Maxim High Voltage Power Supply Reference Designs 29
Description: Single Output 8.25W or 12.5W Synchronous Rectified Isolated Power Supplywith Input Hot Swap Protection for Power-Over-Ethernet Power Devices
Specification:Input voltage +30 to +60V DCOutput voltage +3.3V or +5V DCOutput current 2.5AIsolation 1500VDC
Maxim High Voltage Power Supply Reference Designs 31
Circuit Diagram: Single Output 8.25W or 12.5W Synchronous Rectified Isolated PowerSupply and Input Hot Swap Protection for Power-Over-Ethernet PowerDevices
CookBook6.doc 08/10/2003
Maxim High Voltage Power Supply Reference Designs 32
Performance Data: Single Output 8.25W or 12.5W Synchronous Rectified Isolated PowerSupply and Input Hot Swap Protection for Power-Over-Ethernet Power Devices
Efficiency plot for 3.3V output
Efficiency plot for 5V output
*Note: The efficiency data taken did not include the hot swap section.
Description: Triple Output 14.2W High Efficiency Isolated Power Supply with Synchronous Rectification and Input Hot Swap Protection for Power-over-Ethernet PowerDevices
CookBook6.doc 08/10/2003
Maxim High Voltage Power Supply Reference Designs 33
Specification:
Input voltage: +36 to +60V DCVout1 = +5V@2A ±2% regulationVout2 = +7.5V@ 0.5A ±5% regulation from 10% load to full loadVout3 = +22V@ 20mA ±5% regulation from10% load to full loadIsolation: 1500VDC
Maxim High Voltage Power Supply Reference Designs 35
Circuit diagram: Triple Output 14.2W High Efficiency Isolated Power Supply with SynchronousRectification and Input Hot Swap Protection for Power-over-Ethernet Power Devices