CH5030 降压恒流恒压芯片datasheet

1Features„Wide4.5Vto40VInputVoltageRange„OutputAdjustablefrom1.235Vto37V„MinimumDropOut1.5V„Fixed150kHzSwitchingFrequency„3AConstantOutputCurrentCapability„InternalOptimizePowerTransistor„Excellentlineandloadregulation„Withoutputconstantcurrentloop„Builtinthermalshutdownfunction„Builtincurrentlimitfunction„Builtinoutputovervoltageprotection„TO263-5LpackageApplications„CarCharger„BatteryChargerGeneralDescriptionTheCH5030isa150KHzfixedfrequencyPWMbuck(step-down)DC/DCconverter,capableofdrivinga3Aloadwithhighefficiency,lowrippleandexcellentlineandloadregulation.Requiringaminimumnumberofexternalcomponents,theregulatorissimpletouseandincludeinternalfrequencycompensationandafixed-frequencyoscillator.ThePWMcontrolcircuitisabletoadjustthedutyratiolinearlyfrom0to100%.Anovercurrentprotectionfunctionisbuiltinside.Aninternalcompensationblockisbuiltintominimizeexternalcomponentcount.Figure1.PackageTypeofCH50303A150kHz40VBuckDC/DCConverterWithConstantCurrentLoopCH5030TEL:[phone]web:(TopView)Table1PinDescriptionPinNumberPinNameDescription1VINSupplyVoltageInputPin.CH5030operatesfroma4.5Vto40VDCvoltage.BypassVintoGNDwithasuitablylargecapacitortoeliminatenoiseontheinput.2SWPowerSwitchOutputPin(SW).Outputistheswitchnodethatsuppliespowertotheoutput.3GNDGroundPin.(Note:ConnectedthebackexposedPADtoPin3.)4FBFeedbackPin(FB).Throughanexternalresistordividernetwork,Feedbacksensestheoutputvoltageandregulatesit.Thefeedbackthresholdvoltageis1.235V.5CSOutputCurrentSensePin;(Iload=0.155V/Rcs)3A150kHz40VBuckDC/DCConverterWithConstantCurrentLoopCH5030TEL:[phone]web:(CarCharger)Figure4.CH5030TypicalApplicationCircuit(LiBatteryCharger)CH503047UH3A150kHz40VBuckDC/DCConverterWithConstantCurrentLoopCH5030TEL:[phone]web:“CH”suffixintheparnumber,areRoHScompliant.AbsoluteMaximumRatings（Note1）ParameterSymbolValueUnitInputVoltageVin-0.3to45VFBPinVoltageVFB-0.3toVinVSWPinVoltageVSW-0.3toVinVPowerDissipationPDInternallylimitedmWThermalResistance(JunctiontoAmbient,NoHeatsink,FreeAir)RJA50ºC/WOperatingJunctionTemperatureTJ-40to125ºCStorageTemperatureTSTG-65to150ºCLeadTemperature(Soldering,10sec)TLEAD260ºCESD(HBM)2000VNote1:StressesgreaterthanthoselistedunderMaximumRatingsmaycausepermanentdamagetothedevice.Thisisastressratingonlyandfunctionaloperationofthedeviceattheseoranyotherconditionsabovethoseindicatedintheoperationisnotimplied.Exposuretoabsolutemaximumratingconditionsforextendedperiodsmayaffectreliability.3A150kHz40VBuckDC/DCConverterWithConstantCurrentLoopCH5030TEL:[phone]web:=25℃;unlessotherwisespecified.SymbolParameterTestConditionMin.Typ.Max.UnitSystemparameterstestcircuitfigure5VOUTOutputVoltageVin=4.5Vto40VIload=0.2Ato3A1.1981.2351.272VEfficiencyŋVin=12V,Vout=5VIout=3A-80-%ElectricalCharacteristics(DCParameters)Vin=12V,GND=0V,Vin&GNDparallelconnecta220uf/50Vcapacitor;Iout=500mA,Ta=25℃;theothersfloatingunlessotherwisespecified.ParametersSymbolTestConditionMin.Typ.Max.UnitInputoperationvoltageVin4.540VQuiescentSupplyCurrentIqVFB=Vin25mASwitchCurrentLimitILVFB=03.6AOutputSaturationVoltageVCEVFB=0VISW=2A1.11.4VConstantcurrentsenseVoltageVCS0.1320.1550.178VOscillatorFrequencyFosc127150172Khz3A150kHz40VBuckDC/DCConverterWithConstantCurrentLoopCH5030TEL:[phone]web:(Thesameassystemmaximuminputvoltage)20V30V40V50V60V1A√1N58171N58181N5819√1N58201N58211N5822√MBR320MBR330MBR340MBR350MBR360√SK32SK33SK34SK35SK36√30WQ0330WQ0430WQ05√31DQ0331DQ0431DQ053A√SR302SR303SR304SR305SR3063A150kHz40VBuckDC/DCConverterWithConstantCurrentLoopCH5030TEL:[phone]web::0755-33134103web: