PT4110--LED背光升压IC

HighEfficiencyWhiteLEDDriverChinaResourcesPowtech(Shanghai)Limited(LED)whoselightintensityisproportionaltothecurrentpassingthroughthem.TheexternalballastresistorsetstheLEDcurrentrangingfrom5mAto20mA,whichcanbeeasilyadjustedusingeitheraDCvoltageorapulsewidthmodulated(PWM)signalalternatively.Itslow300mVfeedbackvoltagereducespowerlossandimprovesefficiency.ThePT4110hasmultiplefeaturestoprotectitselffromfaultconditionsincludingbuilt-inopenloadprotection,cycle-by-cyclecurrentlimit,overtemperatureshutdown,inputundervoltagecontrolandintegratedsoft-start.ThePT4110isavailableinSOT-89-5andSOP-8packages.FEATURESz2.7Vto5.5VInputVoltageRangez35VMaximumStep-UpVoltagez1µAShutdownModez1.2MHzFixedFrequencyOperationzCycle-By-CycleCurrentLimitzOpenLoadProtectionzUnderVoltageLockoutzIntegratedSoft-StartzThermalShutdownzFrequencyJitteringforbetterEMIperformancezSOT89-5orSOP8packagezRoHScompliantAPPLICATIONSzWhiteLEDPowerSupplierszFlatScreenLCDBiasSupplierszPortableMediaPlayerszGPSszGeneralmiddle-sizedLCDbacklightORDERINGINFORMATIONPACKAGETEMPERATURERANGEORDERINGPARTNUMBERTRANSPORTMEDIAMARKINGSOT89-5,Pbfree-40℃to85℃PT4110E89ETapeandReel1000unisPT4110xxxxxXSOP8,Pbfree-40℃to85℃PT4110ESOHTapeandReel2500unitsPT4110xxxxxXNote:TYPICALAPPLICATIONCIRCUITxxxxxXAssemblyFactoryCodeLotNumberHighEfficiencyWhiteLEDDriverChinaResourcesPowtech(Shanghai)Limited(note1)SYMBOLITEMSVALUEUNITVINSupplyVoltage-0.3~7VSWDrainoftheinternalpowerswitch-0.3~40VAllOtherPins-0.3~7VθJA-SOT89-5ThermalresistanceforSOT89-565℃/WθJA-SOP-8ThermalresistanceforSOP-8105℃/WPDMAXPowerDissipationSOT89-5(Note2)1WTJOperationJunctionTemperatureRange-40to125oCTSTGStorageTemperature-55to150oCESDSusceptibility(Note3)2kVHighEfficiencyWhiteLEDDriverChinaResourcesPowtech(Shanghai)Limited~5.5VTOPTOperatingTemperature-40to+85oCNote1:AbsoluteMaximumRatingsindicatelimitsbeyondwhichdamagetothedevicemayoccur.RecommendedOperatingRangeindicatesconditionsforwhichthedeviceisfunctional,butdonotguaranteespecificperformancelimits.ElectricalCharacteristicsstateDCandACelectricalspecificationsunderparticulartestconditionswhichguaranteespecificperformancelimits.ThisassumesthatthedeviceiswithintheOperatingRange.Specificationsarenotguaranteedforparameterswherenolimitisgiven,however,thetypicalvalueisagoodindicationofdeviceperformance.Note2:ThemaximumpowerdissipationmustbederatedatelevatedtemperaturesandisdictatedbyTJMAX,θJA,andtheambienttemperatureTA.ThemaximumallowablepowerdissipationisPDMAX=(TJMAX-TA)/θJAorthenumbergiveninAbsoluteMaximumRatings,whicheverislower.Note3:Humanbodymodel,100pFdischargedthrougha1.5kΩresistor.ELECTRICALCHARACTERISTICS(Note4,5)VIN=VEN=3.6V,TA=25℃unlessspecifiedotherwiseSYMBOLITEMSCONDITIONSMin.Typ.Max.UNITVINInputVoltage2.75.5VVUVLOUndervoltagelockoutVINrising2.3VVUVLO,HYSUVLOhysterisisVINfalling100mVFeedbackVFBFBPinVoltage280300320mVIBIASFBPinInputBiasCurrent0.051µAOperatingCurrentIOFFOperatingCurrent（Shutdown）VSW-ON=0V0.11µAIOPOperatingCurrent（Active）35mAFSWSwitchingFrequency1.01.21.5MHzDMAXMaximumDutyCycleVFB=0V9095%ChipEnableVEN_HENMinimumHighLevel1.5VVEN_LENMaximumLowLevel0.4VOutputSwitchRONSWOnResistanceVIN=5V0.4ΩILIMITSWCurrentLimit1.21.5AILEAKSWLeakageCurrentVsw＝5V0.011µAOpenCircuitProtectionVOVOpenCircuitShutdownThresholdVIN=5V35VSoftStarttSSTSoftStartTimeVINPowerOn0.8msNote4:Typicalparametersaremeasuredat25˚Candrepresenttheparametricnorm.Note5:Datasheetmin/maxspecificationlimitsareguaranteedbydesign,test,orstatisticalanalysis.HighEfficiencyWhiteLEDDriverChinaResourcesPowtech(Shanghai)Limited