L9341资料
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L9341
QUADLOWSIDEDRIVERAVANCEDATADU/DTANDDI/DTCONTROLPWMCONTROLLEDOUTPUTCURRENTSHORTCURRENTPROTECTIONANDDI-AGNOSTICINTEGRATEDFLYBACKDIODEUNDERVOLTAGESHUTDOWNOVERVOLTAGEANDUNDERVOLTAGEDI-AGNOSTICOVERTEMPERATUREDIAGNOSTIC
DESCRIPTIONTheL9341isamonolithicintegratedcircuitreal-izedinMultipowerBCD-IImixedtechnology.Thedriverisintendedforinductiveloadsinsynchro-nousPWMapplications,especiallyforvalvedriv-ers.Theoutputvoltageandcurrentriseandfallslopesdu/dtanddi/dtarecontrolled.
Thisisadvancedinformationonanewproductnowindevelopmentorundergoingevaluation.Detailsaresubjecttochangewithoutnotice.March1994UNDERVOLTAGESHUTDOWNDIAGNOSTIC
DRIVERSHORTCURRENTPROTECTIONCHANNEL1
CHANNEL4CHANNEL3CHANNEL2Vflyth
VoffthCOMP1COMP2
I
OSCSDOSDISCLKRES1SERIALINTERFACE&PWMCONTROLLBIAS7
1
15
148613511RES2310912REXT
CS4
OUT3
OUT4
GNDVSVs
IIs
cc
IOUT1
I
IOUT2
OUT3
IOUT4OSCCIGNDCBATDBATVcc
CO1
CO2
C
CO3
O4OUT2VCC
2
outsOUT1di/dt&du/dtCONTROLTHERMALFLAG220nF
10nF
10nF
10nF
10nF10uF
Rext12.4k10nFΩBLOCK&APPLICATIONDIAGRAMMultiwatt15ORDERINGNUMBERS:L9341VL9341HMULTIPOWERBCDTECHNOLOGY
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ABSOLUTEMAXIMUMRATINGSSymbolParameterValueUnitVCCVCCVoltageRange-0.3to6VVSVSVoltageRange-0.3to24VVspmaxVSVoltageRangefort≤400ms-2to40VVstSchaffnerTransientPulsesonVSseenote1VVinInputVoltageRangeforSDI;SCLK;CS;RES1;RES2-0.3toVCC+0.3VoutOutputVoltageRangeforallOutputs:NegativePositive–0.3intern.clampedtoVSVVIoutOutputCurrentforallOutputs:NegativePositive–2+2AAforTransientwitht<10msNegativePositive–55AASchaffnerTransientPulsesonOutputseenote2VESDESDVoltageCapability(MIL883C)1500VTHERMALDATASymbolParameterValueUnitRthj-caseThermalResistanceJunctiontoCase3°C/WRthj-ambThermalResistanceJunctiontoAmbientmountedonPCBoard35°C/WTsdhThermalHysteresis20°CTsdThermalDiagnosticTj>150°CNotes:1.Schaffnertransientspecification:DIN40839testwaveformsofthefollowingtype:1,2,3a,3b,5and6.Thepulsesareappliedtotheapplicationcircuitaccordingtofig.3.2.ThemaximumoutputcurrentresultsfromtheSchaffnerpulsesspecifiedinnote1.PINCONNECTION(Topview)L9341
2/10元器件交易网www.cecb2b.comELECTRICALCHARACTERISTICS(Unlessotherwisespecified:8V≤VS≤24V;4.7V≤VCC≤5.3V;–40°C≤Tj≤150°C;IO≤1A(note3);IO≤1.5A;Vsp=VSfort≤400ms;VOUTP=VOUTfort≤400ms;Rext=12.4KΩ±1%).SymbolParameterTestConditionMin.Typ.Max.UnitIccqVccQuiescentCurrentAllOutputsOff13mAIsqVsQuiescentCurrentAllOutputsOff1425mAVccuVccUndervoltageThresholdSeeNote4344.7VVccrVccRangeforRES1andRES2Operation3VRonOnResistanceIo=1ATj=125°CTj=25°C750450mΩmΩIooffOffStateOutputCurrentOutputsOff1.4V≤Vo≤VsVoutp=Vsp=40V112.5410mAmAVoutfOutputVoltageDuringFlybackIo=1AOutputOffTj=25°CTj=125°CVs+1.3Vs+1.1VVIgndfCurrenttoGNDduringFlyback(seenote5)Io=1AOutputOffVs=24VVsp=40V17204452mAmAIoutrReverseLeakageCurrentVsp-Vo=40V500µAVinHHighInputLevelofSCLK,SDI,CS,RES1,RES20.7*VccVcc+0.3VVinLLowInputLevelofSCLK,SDI,CS,RES1,RES2–0.30.3*VccVVREShysHysteresisofResetInputsRES1,RES20.31VIinRESHInputCurrentonRES1,RES2RESi=H;-2V≤Vsp≤8VRESi=H;8V≤Vsp≤40V–1051010µAµAIinInputCurrentonSCLK,SDI,CS–2V≤Vsp≤40V–1010µAVSDOHHighLevelSDOOutputVoltageISDO=-1mA-2V≤Vsp≤40V0.9*VccVccVVSDOLLowLevelSDOOutputVoltageISDO=1mA-2V≤Vsp≤40V00.4VISDOZSDOTristateHigh-ZLeakageCurrent0≤VSDO≤Vcc–2V≤Vsp≤40V–1010µAPWMdutyPWMDutyCycle1/1615/16KfFrequencyAccuracyConstantSeeNote60.93*KfnKfn1.07*KfnVflythFlybackDiagnosticComparatorThreshold40≥Vsp≥8VVs≤8VVs–11.5Vs–0.4VVVoffthOffStateDiagnosticComparatorThreshold1.52VIoutlOutputCurrentLimitationThresholdseeNote71.52.5AtdpoDelayTimePWMSignaltoOut.515µsSovOutputVoltageRiseandFallSlope|du/dt|(from10to90%ofVo)Fig.21.010V/µsSocOutputCurrentRiseandFallSlope|di/dt|0.1≤Io≤1.5A(from10to90%ofIo)25125mA/µs
Notes:3.ThemeanvalueisIo=1T∫Io(t)dt0T;4.TheoutputsareswitcedoffforVcc≤Vccu.Thelogicisnotreseted.Forareset,RES1orRES2mustbeused.5.ThiscurrentismeasuredintheGND-terminalwhenonesingleoutputisinflybackandconsistsofthesupplycurrentaddedtothevalueoftheoutputcurrentsourceandtheleakagecurrentoftheflybackdiode.Thisleakagecurrentislessthan1%ofthenominalflybackcurrent.6.ThePWMfrequencyisdefinedbyanexternalcapacitor.ThePWMoscillatorfrequencyis:fpwm=fosc32withfosc=KfCosc⋅1A/Vandkin=15⋅10-6;therangeis:300Hz≤fpwm≤3000Hz.TheOSCPincanbealternativelydrivenbyanexternalTTL/CMOSsignal.7.ForIout≥IoutlaninternalcomparatorswitchesthecorrespondingoutputoffforthecurrentPWMcycle.L9341
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15CLK
PWM3PWM4PWM1
PWM214131211109876543210Figure1:LogicDiagramofPWMGeneration.
+12V
IsIs12V
01A
1A0
0du/dtdu/dt
di/dtdi/dt
di/dtdi/dt5%
5%InternalPWMSignal
I
ICurrentthroughFlybackDiodeCurrentthroughLowSideSwitchI
GNDout
VouttdpoouttdpofIfD
DMOSDOUTVs
DI
fOutputVoltageV20mH5
10nF220nFFigure2:OutputSwitchingDiagram.
220nFD1SchaffnerGenerator
4x10nF-2Vto40VVs