5V3A同步整流车充IC方案

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1、PULANTECHNOLOGYCO.,LIMITEDPL2733AWideRangeSynchronousBuckControllerDescriptionFeaturessThePL2733AisasynchronousstepdownWideInputVoltageRange:8Vto30Vregulatorfromahighvoltageinputsupply.Upto93%EfficiencyOperatingwithaninputvoltagerangefrom8VProgrammableSwitchingFrequencyupto30V,thePLX2733Aac

2、hieves3.2Acontinuoustoupto500kHzoutputcurrentwithexcellentloadandlineNoLoopCompensationRequiredregulation.TheswitchingfrequencyisProgrammablecurrentlimitprogrammablefrom130kHzto500kHzandtheThermalShutdownsynchronousarchitectureprovidesforhighlyAvailableinSOP-8LPackageefficientdesigns.Curre

3、ntmodeoperationprovidesfasttransientresponseandeasesloopstabilization.ThePL2733ArequiresaminimumnumberofApplicationsreadilyavailablestandardexternalcomponents.CarCharger/AdaptorOtherfeaturesincludecablecompensation,Pre-RegulatorforLinearRegulatorsprogrammablecurrentlimitandthermalDistribute

4、dPowerSystemsshutdown.BatteryChargerThePL2733AconvertersareavailableintheindustrystandardSOP-8Lpackages.PinAssignmentandDescriptionPINNAMEDESCRIPTION181FBFeedback272RTFrequencySettingPL2733A363ILIMCurrentLimit4VINInputSupplyVoltage455,6SWSwitchNode7,8GNDGroundPuLanTechnology1PULANTECHNOLOGYCO

5、.,LIMITEDPL2733ATypicalApplicationCircuitPL2733A采购PL2733A找：百盛电子。采购PL2733A找：百盛电子。采购PL2733A找：百盛电子。*TheoutputvoltageissetbyR2andR3:VOUT=1.21V•[1+(R2/R3)].*RT:RTisoptional.Theresistorrangeisfrom130KΩto1.5MΩ.PL2733AcanworkwhenkeepingRTpinfloating.Thedefaultfrequencyis130KHZ.*ILIM:PL2733Acanworkwhen

6、keepingILIMpinfloating,with3Alimitcurrentinthissituation.QC2.0快充车充原理图USBU18v～30V33uh64SWVINVin5SW220uF25V470K1%1FB2.2K1%3ILMI7GND220NF10v82GNDRT81137K1%ILMIPL2733ASOP8百盛电子C1输入：12V～24VV72RT100uF50V53输出:64187K1%150K1%5V3AFP6600SOP8百盛电子9V2A(VIN≥9.5V时,输出9V)127K12V1.5A(VIN≥12.5时,输出12V)RT调频率：130K～50

7、0KHz不加默认130KRT(kΩ)=4800000/(200*fOSC(kHz)-24000)百盛电子ILMI可调限流RLIM:RLIM(kΩ)=22*I（MAX）(A).PL2733A输出电压设置：VOUT=1.21V*{1+（R2/R3）}PuLanTechnology2PL2733APULANTECHNOLOGYCO.,LIMITEDAbsoluteMaximumRatings(Note1)InputSupplyVoltage................