HD7100_PRESENTATION-方案

MAY2014HHZEALCORECONFIDENTIAL***TheHD7100Seriesarehighlyintegrated5V1ALi-ionbatterylinearchargingmanagementdevices.*MaximumChargeCurrent:*1.2AforESOP8packages*800mAforSOT23-5/6packages*4.2V/4.3VversionforVFLOAT*NoexternalMOSFET,SenseResistororBlockingDiodeRequired*Constant-Current/Constant-VoltageOperationwithThermalRegulationtoMaximizeChargeRateWithoutRiskofOverheating*ESOP8,SOT23-5andSOT23-6packages*PARTNOVBATPACAKGETEMPERATURETAPE&REELHD7100A23E-424.2VSOT23-5-40~+85℃3000/REELHD7100A23E-434.3VSOT23-5-40~+85℃3000/REELHD7100A23F-424.2VSOT23-6-40~+85℃3000/REELHD7100A23F-434.3VSOT23-6-40~+85℃3000/REELHD7100AESH-424.2VESOP8-40~+85℃2500/REELHD7100AESH-434.3VESOP8-40~+85℃2500/REELORDERINFORMATIONSYMBOLPINNODESCRIPTTIONSOT23-5SOT23-6ESOP8TEMP1TemperatureSenseInputPROG562ChargeCurrentProgram,MonitorandShutdownPinGND223GroundVCC444PowerSupplyInputBAT335ChargeCurrentOutputSTDBY56Open-DrainStandbyStatusOutput.CHRG117Open-DrainChargeStatusOutput.CE8ChipEnableInputPINDESCRIPTION**SYMBOLPARAMETERVALUEUnitsVCCInputsupplyvoltage8VVPROGPROGVoltageVCC+0.3VVINOUTBAT,CHRG,STDBY,CE,TEMPVoltage8VDSCBATShort-CircuitDurationContinuousIBATBATPinCurrent,ESOP8Package1AIBATBATPinCurrent,SOT23-5/6Package800mAIPROGPROGPinCurrent800μAPTRPackageThermalResistance,SOT-23-5θJA220oC/WTjMaximumJunctionTemperature125℃TsStorageTemperatureRange-65to125℃TLeadLeadTemperature,soldering,10Sec260℃SYMBOLPARAMETERVALUEUnitsVCCInputsupplyvoltage-0.3to+6VTjJunctionTemperature-40to+85℃ABSOLUTEMAXIMUMRATINGSRECOMMENDEDOPERATINGRANGE**1.ATypicalChargingCycleAtypicalChargingCycleincludesthreephases:•TrickleCurrent(VBAT2.9V),thechargingcurrentisabout1/10ofthesetcurrent.•ConstantCurrent(VBAT2.9V),thechargingcurrentisthesetcurrent.•ConstantVoltage(VBAT=4.2V),theoutputvoltageisconstantandthecurrentisvariable.TrickleCurrentConstantCurrentConstantVoltage*2.Thermal-regulatedChargeCurrentCurveWhiletheChargeCurrentIBATisverylargeandtheVCC-VBATdeltaisalsolarge,thePowerDissipationoftheICisveryhigh:PD=(VCC-VBAT)*IBATAndtheICgoesintothermalregulationmodetoavoiddamagingfromover-heated.ThustheChargeCurrentdropsfromthesetvalue.ThisisonlyforlargeChargeCurrentcases.ThermalRegulated*3.SettheChargeCurrentChargeCurrentIBATissetbytheresistorRPROGasfollows:IBAT=1000/RPROGForexample,ifRPROG=2K,thenIBAT=0.5A.IfIBAT=1Aiswanted,thenRPROGshouldbesetto1K.Inorderforanaccuratechargecurrent,the1%toloranceresistorissuggested.Disconnecttheresistorstopsthechargecycle.*4.EnlargeThermal-RegulatedChargeCurrentAssaidinpreviouspage,thechargecurrentisthermalregulatedifthecurrentandtheVCC-VBATarebothlarge.Amethodtoenlargethecurrentistoconnectaresistor(RCC)betweenthepowersupplyandtheVCCpinoftheIC.Forexample,ifVCC=5V,VBAT=3.75V,θJA=125℃/W,thenIBATforRCC=0(namelynoRCC):𝐼𝐵𝐴𝑇=145−25(5−3.75)×125=768(𝑚𝐴)IBATforRCC=0.25Ωis:𝐼𝐵𝐴𝑇=145−25(𝑉𝐶𝐶−𝐼𝐵𝐴𝑇𝑅𝐶𝐶−𝑉𝐵𝐴𝑇)×125=948(𝑚𝐴)*5.StatusIndicatorsTheIChastwostatusindicatorsexceptforSOT23-5versions.Thecombinationofthetwoindicators(CHRGandSTDBY)isdesignedasfollowingtable:StatusCHRGLEDSTDBYLEDChargingLightingDarkCompletionofachargingcycleDarkLightingNobatteryexistsatBATpin,butacapacitorisconnected,TSfunctionnotusedBlinkLightingNobatteryexistsandnocapacitorconnectedDarkDarkUVLODarkDarkOvertemperatureorUndertemperatureBlinkBlink*6.TemperatureSenseTheIChasthetemperaturemonitorfunctioninordertoprotectthebatteryfromdamageduetooverorundertemperature.ByconnectiontheTEMPpintoaresistordividerandtheNTCthemistorinsidethebattery,theICcomparesthevoltageontheTEMPpinwiththeVLOWandVHIGHthresholdvoltages,andterminatesthechargeprocesswhileVTEMPbeyondthethreshold.VLOWisabout40%ofVCCandVHIGHisabout80%ofVCC.ThefunctionisclosedwhenTEMPisconnectedtoGNDorleftfloating.*7.HotPlug-inApplicationsForHotPlug-inApplicationssuchasUSB/Adaptersuppliedapplications,theICmightbedestroyedduetothespikesonthepowerlinewithplug-inandoutactions.TopreventtheICfromdestroy,a5.6Vbreak-downdiodeissuggestedatthepowersupplyinnode.*8.PCBLayoutGuide•PlaceRPROGascloseaspossibletotheIC•PlaceCapacitorsonVCCandBATpinascloseaspossibletotheIC•TheexposedPADoftheIC(ESOP8packages)shouldbereliablysolderedtoGround.•ThehighCurrentPath(VCC,BAT)shouldbewidetodissipatedtheheat.•AGroundPlaneisnecessaryforagoodheat-dissipation,especiallyforlargechargecurrentapplications.***HD7100isidealforLi-ionBatteryChargingManagement.*MaximumChargeCurrentis1.2A*ProtectionsincludeUVLO,ThermalShutdown,ThermalRegulation,etc.*TemperatureMonitor,CEpinforManuallyTerminatingaChargeCycle.*VCCoperableat9V,thoughlong-termreliabilityisnotgarenteed.*TheEND