EUP3270-车充快充降压IC

EUP3270DS3270Ver1.0July20161CC/CVModeSynchronousStep-DownConverterDESCRIPTIONTheEUP3270isasynchronousstep-downconvertercapableofdriving4Acontinuousloadwithexcellentlineandloadregulation.TheEUP3270operatesineitherCC(ConstantCurrent)modeorCV(ConstantVoltage)modewithaninputvoltagerangefrom4.5Vto30V.TheEUP3270providesprogrammablecablecompensationbyadjustingexternalresistordivider.ExternalshutdownfunctioncanbecontrolledbypullingCOMPpintoalevelbelow0.14V.Faultprotectionincludessecondarycycle-by-cyclecurrentlimit,shortcircuitprotectionandthermalshutdown.Internalsoft-startminimizestheinrushsupplycurrentandtheoutputovershootatinitialstartup.TheEUP3270isavailableinSOP-8(EP)package.TypicalApplicationCircuitFEATURES
4.5Vto30VWideInputOperatingRange
80kHz~800kHzSwitchingFrequencySelection
CC/CVModeControl
Upto4AOutputCurrent
+/-1%VoltageReferenceAccuracy
+/-4%ConstantCurrentAccuracy
ProgrammableCableCompensation
InternalSoftStart
SinglePintoExternalCompensationandShutdownControl
HiccupShortCircuitProtection
SecondaryCycle-by-CycleCurrentLimit
ThermalShutdown
AvailableinSOP-8(EP)Package
RoHSCompliantand100%Lead(Pb)-FreeHalogen-FreeAPPLICATIONS
CarCharger
Portablechargerapplications
DC/DCconverterswithcurrentlimitedFigure1.ApplicationCircuitEUP3270DS3270Ver1.0July20162BlockDiagramFigure2.FunctionalBlockDiagramPinConfigurationsPackageTypePinConfigurationsSOP-8(EP)PinDescriptionPinNameSOP-8(EP)DESCRIPTIONVIN1InputSupplyPin.GND2Ground.COMP3Loopcompensationpin.DriveCOMPvoltagelogiclowtoturnofftheconverter.FB4OutputFeedbackInput.CS5Currentsenseinputpin.VDC6InternalVDCregulatoroutput.BypassVDCtogroundwithaceramiccapacitor.FREQ7Frequencyselectpin.PGND8Powerground.SWEPPowerswitchpin.EUP3270DS3270Ver1.0July20163OrderingInformationOrderNumberPackageTypeMarkingQuantityperReelOperatingTemperatureRangeEUP3270WIR1SOP-8(EP)xxxxxP32702500-40°Cto+85°CEUP3270□□□□□□□□□□□□□□□□LeadFreeCode1:LeadFree,HalogenFreePackingR:Tape&ReelOperatingtemperaturerangeI:IndustryStandardPackageTypeW:SOP(EP)EUP3270DS3270Ver1.0July20164AbsoluteMaximumRatings(1)InputVoltage(VIN)----------------------------------------------------------------0.3Vto32VSwitchVoltage(VSW)-------------------------------------------------------------1VtoVIN+0.3VCS------------------------------------------------------------------------------------0.3Vto13VAllOtherPins----------------------------------------------------------------------0.3Vto6VJunctionTemperature-------------------------------------------------------------150°CStorageTemperature---------------------------------------------------------------65°Cto+150°CLeadTemp(Soldering,10sec)---------------------------------------------------260°CThermalResistanceθJA(SOP-8_EP)------------------------------------------60°C/WRecommendOperatingConditions(2)SupplyVoltage(VIN)-----------------------------------------------------------4.5Vto30VOperatingTemperatureRange--------------------------------------------------40°Cto+85°CNote(1):Stressbeyondthoselistedunder“AbsoluteMaximumRatings”maydamagethedevice.Note(2):Thedeviceisnotguaranteedtofunctionoutsidetherecommendedoperatingconditions.ElectricalCharacteristics(VIN=12V,TA=+25°C,IOUT=2.0A,unlessotherwisespecified)EUP3270ParameterConditionsMin.Typ.Max.UnitInputvoltage4.530VInputNoLoadCurrentIOUT=0A10mAQuiescentCurrentVFB=0.8V1mAShutdownCurrentVCOMP=0V380μAInputUnderVoltageLockoutThresholdRising3.954.154.35VInputUnderVoltageLockoutThresholdHysteresis0.4VCurrentLimit7.5A135150165kHzOperatingfrequencyR4=0ΩTJ=-25°Cto125°C127173kHzMaximumDutyCycle100%MinimumOn-Time150ns0.5940.60.606VReferenceVoltageoftheVoltageErrorAmplifierTJ=-25°Cto125°C0.5870.613V57.46062.6mVCSReferenceVoltageTJ=-25°Cto125°C56.463.6mVTransconductanceofErrorAmplifier75μA/VReferenceVoltageoftheShortCircuitFoldbackComparator0.24VCOMPEnableThresholdRising0.14VCOMPEnableThresholdHysteresis40mVTemperatureRising150°CThermalShut-downTemperatureTemperatureFalling100°CVIN=12V,IOUT=1A35PMOSDrain-SourceOn-StateResistanceVIN=5V,IOUT=1A44mΩNMOSDrain-SourceOn-StateResistanceIOUT=1A32mΩEUP3270DS3270Ver1.0July20165TypicalOperatingCharacteristicsVIN=12V,VOUT=5V,FSW=150KHz,TA=25°C,unlessotherwisenoted.EUP3270DS3270Ver1.0July20166TypicalOperatingCharacteristics(continued)VIN=12V,VOUT=5V,FSW=150KHz,TA=25°C,unlessotherwisenoted.EUP3270DS3270Ver1.0July20167FunctionalDescriptionTheEUP3270isacurrent-modesynchronousstep-downconverterwith4.5Vto30Vinputpowersupply.Thedevicecanprovideupto4Acontinuouscurrenttotheoutput.TheEUP3270usescurrent-modearchitecturetocontroltheregulatorloop.TheoutputvoltageismeasuredatFBthrougharesistivevoltagedividerandamplifiedthroughtheinternalerroramplifier.TheoutputcurrentofthetransconductanceerroramplifierispresentedatCOMPpinwhereaRCnetworkcompensatestheregulatorloop.Slopecompensationisinternallyaddedtoeliminatesubharmonicoscillationathighdutycycle.Theslopecompensationaddsvoltageramptotheinductorcurrentsignalwhichreducesmaximuminductorpeakcurrentathighdutycycles.CC/CVmodecontrolTheEUP3270operatesineitherCCmodeorCVmo