TEL:18617042732***:3073924495Thebq2423xseriesofdevicesarehighlyintegratedLi-ionlinearchargersandsystempower-pathmanagementdevicestargetedatspace-limitedportableapplicati***.ThedevicesoperatefromeitheraUSBportoracadapterandsupportchargecurrentsbetween25mAand500mA.Thehigh-input-voltagerangewithinputovervoltageprotectionsupportslow-cost,unregulatedadapters.TheUSBinputcurrentlimitaccuracyandstart-upsequenceallowthebq2423xtomeetUSB-IFinrushcurrentspecification.Additionally,theinputdynamicpowermanagement(VIN-DPM)preventsthechargerfromcrashingpoorlydesignedorincorrectlyconfiguredUSBsources.Thebq2423xfeaturesdynamicpower-pathmanagement(DPPM)thatpowersthesystemwhilesimultaneouslyandindependentlychargingthebattery.TheDPPMcircuitreducesthechargecurrentwhentheinputcurrentlimitcausesthesystemoutputtofalltotheDPPMthreshold,thussupplyingthesystemloadatalltimeswhilemonitoringthechargecurrentseparately.Thisfeaturereducesthenumberofchargeanddischargecyclesonthebattery,allowsforproperchargetermination,andenablesthesystemtorunwithadefectiveorabsentbatterypack.Additionally,thisenablesinstantsystemturn-onevenwithatotallydischargedbattery.Thepower-pathmanagementarchitecturealsopermitsthebatterytosupplementthesystemcurrentrequirementswhentheadaptercannotdeliverthepeaksystemcurrents,enablingtheuseofa***alleradapter.Thebatteryischargedinthreephases:conditioning,c***tantcurrent,andc***tantvoltage.Inallchargephases,aninternalcontrolloopmonitorstheICjunctiontemperatureandreducesthechargecurrentiftheinternaltemperaturethresholdisexceeded.Thechargerpowerstageandchargecurrentsensefuncti***arefullyintegrated.Thechargerfunctionhashigh-accuracycurrentandvoltageregulationloops,chargestatusdisplay,andchargetermination.Theinputcurrentlimitandchargecurrentareprogrammableusingexternalresistors.特性·FullyCompliantUSBChargeroSelectable100-mAand500-mAMaximumInputCurrento100-mAMaximumCurrentLimitEnsuresCompliancetoUSB-IFStandardoInput-basedDynamicPowerManagement(VIN-DPM)forProtectionAgainstPoorUSBSources·28-VInputRatingWithOvervoltageProtection·IntegratedDynamicPower-PathManagement(DPPM)FunctionSimultaneouslyandIndependentlyPowerstheSystemandChargestheBattery·Supportsupto500-mAChargeCurrentWithCurrentMonitoringOutput(ISET)·ProgrammableInputCurrentLimitupto500 mAforWallAdapters·ProgrammableTerminationCurrent(bq24232)·ProgrammablePrechargeandFast-ChargeSafetyTimers·ReverseCurrent,Short-Circuit,andThermalProtection·NTCThermistorInput·ProprietaryStart-UpSequenceLimitsInrushCurrent·StatusIndication–Charging/Done,PowerGood·***all3mm×3mm16-LeadQFNPackage·APPLICATI***封装:QFN(RGT))