XA4203双节8.4V锂电池充电ic

FFeeaattuurreessEnd-Charge-CurrentDetectionOutputConstantSwitchingFrequencyforMinimumNoiseAutomaticBatteryRechargeAutomaticShutdownWhenInputSupplyisRemovedAutomaticTrickleChargingofLowVoltageBatteriesBatteryTemperatureSensingStablewithCeramicOutputCapacitorSOP-8LPackageDDeessccrriippttiioonnTheXA4203isacompletebatterychargercontrollerfortwo(8.4V)cellslithium-ionbatteries.TheXA4203providesasmall,simpleandefficientsolutiontofastchargeLi-ionbattery.Anexternalsenseresistorsetsthechargecurrentwithhighaccuracy.Aninternalresistordividerandprecisionreferencesetthefinalfloatvoltageto8.4V.Whentheinputsupplyisremoved,theXA4203automaticallyentersalowcurrentsleepmode.TheXA4203isavailableintheSOP-8Lpackage.SSttaannddaalloonneeLLii--IIoonnSSwwiittcchhMMooddeeBBaatttteerryyCChhaarrggeerrAApppplliiccaattiioonnChargingDocksHandheldInstrumentsPortableComputersInputSupplyRange:9.2-14VXA4203TTyyppiiccaallAApppplliiccaattiioonn＊PPiinnAAssssiiggnnmmeennttTopViewSOP-8LPINNUMBERPINNAMEFUNCTION1VREFVoltageReferencetoDriveLED2VINInput3SWSwitchOutput4GNDGround5CHRGOpen-DrainChargeStatusforOutput6FBFeedback7PROGChargeCurrentProgram8TSTemperatureSenseVREFVINSWGND12348765TSPROGFBCHRGThechargecurrentcanbesetbyIout=0.11V/R3XA4203AAbbssoolluutteeMMaaxxiimmuummRRaattiinnggss(Note1)InputSupplyVoltage(VIN).........................................................................................VCHRG..............................................................................................................VSW.........................................................................................................................VPROG.....................................................................................................................SWPinCurrent................................................................................................................4AOperatingTemperatureRange……………………………………………………...-40℃～+85℃LeadTemperature(Soldering10sec.)………………………………………………………..+300℃StorageTemperatureRange……………………………………………………….-65℃～+150℃JunctionTemperature………………………………………………………………………-40℃～+125℃RReeccoommmmeennddeeddOOppeerraattiinnggCCoonnddiittiioonnss(Note2)SupplyInputVoltage………………………………………………………………………………JunctionTemperatureRange………………………………………………………………-40°Cto125°CAmbientTemperatureRange…………………………………………………………………-40°Cto85°CNote1.Stresseslistedastheabove“AbsoluteMaximumRatings”maycausepermanentdamagetothedevice.Theseareforstressratings.Functionaloperationofthedeviceattheseoranyotherconditionsbeyondthoseindicatedintheoperationalsectionsofthespecificationsisnotimplied.Exposuretoabsolutemaximumratingconditionsforextendedperiodsmayremainpossibilitytoaffectdevicereliability.Note2.Thedeviceisnotguaranteedtofunctionoutsideitsoperatingconditions.-0.3V--14V-0.3V--7V-0.3V--14V-0.3V--14V9.2V--14VXA4203EElleeccttrriiccaallCChhaarraacctteerriissttiiccssOperatingConditions:TA=25℃.SYMBOLPARAMETERCONDITIONSMINTYPMAXUNITSVINISLEEPVINSleepCurrentVIN=7VVOUT=7.22V40μAIINInputSupplyCurrentCurrentMode260μAFOSCOscillatorFrequencyforOutputVIN=9V,VOUT=7V,R3=0.1Ω0.78MHzVIN=9V,VOUT=8V95EFFI(Note4)EfficiencyforOutputVIN=12V,VOUT=8V93%BatteryVoltageRegulationConstant-currentChargeVO(REG)VPROG–VFBCurrentRegulationThresholdPrechargeComparatorV(min)PrechargeThresholdVIN=9V5.5VPrechargeCurrentRegulationI(PRECHG)PrechargeCurrentRegulationR3=0.1Ω,VIN=9VVRCHcomparator（（（（BatteryRechargeThreshold））））V（RCH）RechargeThresholdVIN=12VVO(REG)-150mVVVREFPinConstant-currentChargeVIN=9V,VOUT=7.8V33.5mVVREFChargeTerminationVIN=9V,VOUT=8.5V2.33VCHRGPinVOL(CHRG)Output（low）Voltage0.15VTSPinVTS-COLDTSPinThresholdVoltage（Cold）VTSfromLowtoHigh2.422VTS-HOTTSPinThresholdVoltage（Hot）VTSfromHightoLow0.479VITSTSPinOutputCurrent99.5uAInputVoltageRange9.214VOutputVoltage8.38.448.54V110mV100mAXA4203TTyyppiiccaallPPeerrffoorrmmaanncceeCChhaarraacctteerriissttiiccssRechargeVoltageOffsetfromFullChargedVoltagevs.InputVoltage00.050.10.150.20.250.30.350.40.450.5910111213141516InputVoltage(V)Vrecharge(V)OscillatorFrequencyvs.SupplyVoltage(Vout=8V)650660670680690700710720730740750910111213141516SupplyVoltage(V)OscillatorFrequency(kHz)SupplyCurrentvs.SupplyVoltage0.250.2550.260.2650.270.2750.280.2850.290.2950.3910111213141516SupplyVoltage(V)SupplyCurrent(mA)Efficiencyvs.InputVoltage50556065707580859095100910111213141516InputVoltage(V)Efficiency(%)VBAT=8VVBAT=7VXA4203PPiinnAAssssiiggnnmmeennttVREF(Pin1):VoltagereferencetodriveLED.VIN(Pin2):PositiveInputSupplyVoltage.Itprovidespowertothecharger.VINcanrangefrom9VtoSW(Pin3):SwitchNodeConnectiontoinductor.ThispinconnectstothedrainoftheinternalmainpowerMOSFETswitches.GND(Pin4):Ground.CHRG(Pin5):Open-DrainChargeStatusOutput.Whenthebatteryischarging,theCHRGpinispulledlowbyaninternalN-channelMOSFET.Whenthechargecycleiscompletedorreversebatterylockout/NoACisdetected,CHRGisforcedhighimpedance.FB(Pin6):FeedbackPin.Receivesthefeedbackvoltagefromtheoutput.PROG(Pin7):ChargeCurrentProgram.Theoutputcurrentissetbyanexternalresistoraccordingtothefollowingf