Rev. 1.00 1 November 07, 2017 HT7K1201 1 Channel, 6.0V, Peak Current 1.3A H-Bridge Driver Features • 1 Channel H-Bridge Motor Driver: Low MOSFET On-resistance: 0.5Ω (HS+LS) • Wide VDD Input Voltage Range of 1.8V to 6.0V • Maximum 1.3A Motor Peak Current • Four Operation Modes: Forward, Reverse, Brake and Standby • Low Sleep Current < 0.1μA • Up to 200kHz PWM Input Control Operation • Protection Features ♦ VDD Under Voltage Lock-Out ♦ Over Current Protection ♦ Thermal Shutdown Protection ♦ Output Short Circuit Protection • Package Type: 6-pin SOT23-6 • Operation Temperature Range: -40 o C to +85 o C Applications • Valve/Pump, Electric Locks and Consumer Toys General Description The HT7K1201 is a 1-channel H-bridge driver with a maximum motor peak current of 1.3A. Its outstanding low on-resistance characteristic results in excellent output efficiency which is a major advantage in battery powered systems. A simple two input control pin structure is used to provide four control modes: Forward, Reverse, Brake and Standby/Sleep modes. With a PWM input control frequency of up to 200 kHz, accurate speed control can be implemented for a wide variety of applications. A full range of protection functions are integrated including OCP, OSP and OTP to prevent device damage even if the motor stalls or experiences a short circuit in critical operating environments. As the automatic sleep mode activation mechanism uses the same mode control pins, an additional extra shutdown signal is not required. In addition, an ultra-low 0.1μA sleep mode current ensures long battery life. Typical Application Circuits HT7K1201 M OUT1 OUT2 IN1 VDD GND IN2 MCU 1.8V to 6V OUT1 OUT2 C1 VDD CM
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HT7K1201 1 Channel, 6.0V, Peak Current 1.3A H … · 1 Channel, 6.0V, Peak Current 1.3A H-Bridge Driver Features • 1 Channel H-Bridge Motor Driver: Low MOSFET ... mechanism uses
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Rev. 1.00 1 November 07, 2017 Rev. 1.00 PB November 07, 2017
HT7K12011 Channel, 6.0V, Peak Current 1.3A H-Bridge Driver
General DescriptionTheHT7K1201isa1-channelH-bridgedriverwithamaximummotorpeakcurrentof1.3A.Itsoutstandinglowon-resistancecharacteristic results inexcellentoutput efficiencywhich is amajor advantage inbatterypoweredsystems.Asimpletwoinputcontrolpinstructure isusedtoprovidefourcontrolmodes:Forward,Reverse,BrakeandStandby/Sleepmodes.WithaPWMinputcontrol frequencyofup to200kHz,accuratespeedcontrolcanbeimplementedforawidevarietyofapplications.AfullrangeofprotectionfunctionsareintegratedincludingOCP,OSPandOTPtopreventdevicedamageeven if themotor stallsorexperiencesa short circuit incriticaloperatingenvironments.Astheautomaticsleepmodeactivationmechanismuses the samemode control pins, anadditional extra shutdown signal is not required.Inaddition,anultra-low0.1μAsleepmodecurrentensureslongbatterylife.
Typical Application CircuitsHT7K1201
M
OUT1
OUT2
IN1
VDD
GND
IN2MCU
1.8V to 6VOUT1
OUT2
C1
VDD
CM
Rev. 1.00 2 November 07, 2017
HT7K1201
Functional Block Diagram
OUT1
PGND
OUT2
ControlLogic OTP
VDD
IN1
IN2
Charge Pump
GateDriver
GateDriver
GND
GateDriver
GateDriver
UVLO
OCP/OSP
OCP/OSP
Pin Assignment
Top View
SOT23-6
K1201
6 5 4
321
IN2GNDOUT2
IN1VDDOUT1
Rev. 1.00 3 November 07, 2017
HT7K1201
Pin DescriptionPin No. Pin Name Type Description
1 OUT2 O H-Bridge Output 22 GND G Ground
3 IN2 IControl Input 2Pin must not be allowed to float. Should be connected to external 100kΩ pull up or pull down resistor.
4 IN1 IControl Input 1Pin must not be allowed to float. Should be connected to external 100kΩ pull up or pull down resistor.
5 VDD P Power supply6 OUT1 O H-Bridge Output 1
Note:I:InputO:OutputP:PowerG:Ground
Absolute Maximum RatingsParameter Value Unit
VDD -0.3 to +6.6 VIN1, IN2 -0.3 to (VDD+0.3) VOperating Temperature Range -40 to +85 °CMaximum Junction Temperature +150 °CStorage Temperature Range -65 to +160 °CLead Temperature (Soldering 10 sec.) +260 °C
ESD SusceptibilityHuman Body Model ±3000 VMachine Model ±100 V
Symbol Parameter Test Condition Min. Typ. Max. UnitPower Supply VDD Supply voltage — 1.8 — 6.0 VIDD Supply operation current PWM=25kHz, OUT1 and OUT2 open — 650 1000 μAIDD(STB) Supply standby current IN1=IN2=’0’, charge pump activated — 600 800 μAIDD(SLP) Supply sleep current IN1=IN2=’0’, charge pump disabled — ─ 0.1 μAH-Bridge DriverRON *HS+LS FET on-resistance VDD=VM=3V, IOUT=500mA — 0.5 — ΩVCLAMP Clamp diode voltage I=300mA (HS and LS) — 0.8 — Vtr(OUT) Output rise time RL=20Ω, 10% to 90% (Figure1) — 100 — nstf(OUT) Output fall time RL=20Ω, 10% to 90% (Figure1) — 30 — nsControl LogicVIL Input logic low voltage VDD=5V 0.8 ─ ─ VVIH Input logic high voltage VDD=5V — ─ 2 VVHYS Input logic hysteresis — — 0.1 — VtP1
IN-to-OUT Propagation delay(Figure1)
RL=20Ω, INx to OUTx (high-Z to high/low) — 40 — nstP2 RL=20Ω, INx to OUTx (high/low to high-Z) — 120 — nstP3 RL=20Ω, INx to OUTx — 40 — nstP4 RL=20Ω, INx to OUTx — 120 — ns
tSLPEN Sleep mode entry time IN1=IN2=’0’ until charge pump switches off (Figure1) — 10 — ms
fPWM Input PWM frequency Internal charge pump activates — ─ 200 kHzCharge PumptCP_ON Charge pump on time Charge pump activation time — 11 — msProtectionVUVLO+ VDD turn on level VDD rises — — 1.8 VVUVLO− VDD turn off level VDD falls 1.5 — — VIOCP Over current threshold With deglitch time, tDEG 0.9 1.3 — AtDEG Over current deglitch time (Figure2) — 1 — μstRETRY Over current retry time (Figure2) — 1 — msISCP** Short circuit protection threshold Without deglitch time (Figure3) — 1.9 — AtSHD Thermal shutdown threshold — — 150 — °CtREC Thermal recovery temperature — — 120 — °C
Note: * The "HS" means High Side while the "LS" means Low Side.** The HT7K1210 device provides full short circuit protection for the OUTx-to-ground, OUTx-to-power or OUT1-to-OUT2 path.
Rev. 1.00 5 November 07, 2017
HT7K1201
IN1
IN2
OUT1
OUT2
tCP_ON
tP4
tP2
tP3
tP1
tSLPEN
High-Z
High-Z
High-Z
High-Z
V(CP)internal
OUTx
tr(OUT) tf(OUT)
Figure1. Control Logic and Sleep Mode Timing Diagram
H-Bridge ControlAccordingto theIN1andIN2pinstates thedevicewillgeneratefourH-bridgeoutputstates:Standby/Sleep,Forward,ReverseandBrake.Theinput/outputoperation truth table isshown inTable1.Note thattheIN1andIN2control inputpinsarenotallowedtofloatandmustbeconnectedtoanexternal100kΩpull-uporpull-downresistor.
IN1 IN2 OUT1 OUT2 Functional ModeH-Bridge Status
M1 M2 M3 M40 0 Z Z Standby/Sleep OFF OFF OFF OFF0 1 L H Reverse OFF ON ON OFF1 0 H L Forward ON OFF OFF ON1 1 L L Brake OFF ON OFF ON
Table1. Operation Truth Table
OFF
M
VM
OUT2
M3
OFF
M4
M1
M2
OFF
OFF
OUT1
M3
M4
M1
M2
OFF
OFF
ON
ON
OUT2OUT1
VM
Standby-SLEEP Forward
OFF
ON
ON
OFF
M3
M4
M1
M2M M
VM
MOUT2OUT1 OUT2OUT1
M3
M4
M1
M2
OFF
ON
OFF
ON
Reverse Brake
VM
H-Bridge Functional Modes
Sleep ModeWhentheHT7K1201deviceremains inthestandbymodeforaperiodoftime,tSLPEN,withatypicalvalueof10ms, thedevicewillenter theSleepmode.Allfunctionalblocksareturnedofftoreducethecurrentconsumptiontoanultra-lowvalueoflessthan0.1μA(max).Whenan IN1or IN2pin is set to ‘H’, thedevicewillexitfromthesleepmode.
VDD Under Voltage Lock-outIn order to avoid anH-bridgemetastable outputconditionwhenpowered-onorwitha lowbatteryvoltage, an under voltage lockout function isintegratedwithin the device.During the power-onperiod, theH-bridgeoutputswill remaininhighimpedancestatesand thecontrol inputsare ignored
Over Temperature Protection − OTPIfthedietemperatureexceedstheinternallimitthresh-limitthresh-old,TSHD,thedevicewillturnoffallpowerMOSFETsuntilthetemperaturedecreasestoaspecificlevellessthantherecoverytemperature,TREC.
Power DissipationThemainpowerdissipationintheHT7K1201deviceisdeterminedbytheon-resistanceof internalpowerMOSFETs.Theaveragepowerdissipationcanbeestimatedusingthefollowingequation:
PAVG=RON×(IOUT(RMS))2
WherePAVG is theaveragepowerdissipationof thedevice,RON is the totalon-resistanceofHSandLSMOSFETsand IOUT(RMS) is theRMSorDCoutputcurrentthroughtheload.NotethattheRONvaluewillvarywith thedie temperature.Thehigher thedietemperatureis,thehigherwillbetheRONvalue.Whentheambient temperature increasesoras thedeviceheatsup,thepowerdissipationofthedevicewillalsoincrease.
Component/Motor Selection Guide
Motor ConsiderationTheappropriatemotorvoltagedependsupon thedesiredRPMandpowersupplysource.Highermotorvoltagesalsoincreasethemotorcurrentrate.Notethatthemotorstallcurrentmustbelessthantheinternallimitoutputcurrent,IOCP, toavoidfailureswhenthemotorstartsup.
itprovidesa transientpowersource to themotor tocompensateforthebatteryresponsetimeorforlongconnectingwireeffectswhenthemotorstartsuporforfastcontrolswitchingbetweenforwardandreversemodes.
Motor Bypass CapacitorThebypasscapacitor,CM,providesthefastflywheelpathtoreleasetheinductiveenergyof themotor.Inmostapplications, thecapacitancevalue isset toavalueof0.1μF.Usually thiscapacitor is internallycontained within the motor and not requiredexternally. Insomeapplications,especially in lowspeedmotors, the large internalmotor resistorconnectedwiththebypasscapacitor inparallelmayresult in an instantaneous large currentwhen themotorstartsup.ItmayhowevertriggerafaultyOCP/OSPreactionwhichwill fail tostartup themotor.There are twoways to solve this phenomenon:decreasethebypasscapacitorvalueoradda47Ωto100Ωresistorinserieswiththebypasscapacitor.
Fora fixedTJ(MAX)of150°C, themaximumpowerdissipation depends upon the operating ambienttemperatureandthepackage'sthermalresistance,θJA.Thede-ratingcurvebelowshowstheeffectofrisingambienttemperatureonthemaximumrecommendedpowerdissipation.
The information appearing in this Data Sheet is believed to be accurate at the time of publication. However, Holtek assumes no responsibility arising from the use of the specifications described. The applications mentioned herein are used solely for the purpose of illustration and Holtek makes no warranty or representation that such applications will be suitable without further modification, nor recommends the use of its products for application that may present a risk to human life due to malfunction or otherwise. Holtek's products are not authorized for use as critical components in life support devices or systems. Holtek reserves the right to alter its products without prior notification. For the most up-to-date information, please visit our web site at http://www.holtek.com.tw.