johnson_fan：
BQ77PL900,5至10节锂离子电池保护和AFE.说明Thebq77PL900isafivetotenseriescelllithium-ionbatterypackprotector.TheintegratedI2Ccommunicationsinterfaceallowsthebq77PL900alsotobeasananalogfrontend(AFE)foraHostcontroller.TwoLDOs,one5V/25mAandone3.3V/25mA,arealsoincludedandmaybeusedtopowerahostcontrollerorsupportcircuitry.Thebq77PL900integratesavoltagetranslationsystemtoextractbatteryparameterssuchasindividualcellvoltagesandcharge/dischargecurrent.VariablessuchasvoltageprotectionthresholdsanddetectiondelaytimescanbeprogrammedbyusingtheinternalEEPROM.Thebq77PL900canactasastand-aloneself-containedbatteryprotectionsystem(stand-alonemode).Itcanalternativelybecombinedwithahostmicrocontrollertoofferfuelgaugeorotherbatterymanagementcapabilitiestothehostsystem(host-controlmode).Thebq77PL900providesfullsafetyprotectionforovervoltage,undervoltage,overcurrentindischarge,andshortcircuitindischargeconditions.WhentheEEPROMprogrammablesafetythresholdsarereached,thebq77PL900turnsofftheFETdriveautonomously.Noexternalcomponentsareneededtoconfiguretheprotectionfeatures.Theanalogfrontend(AFE)outputsallowahostcontrollertoobserveindividualcellvoltagesandcharge/dischargecurrents.Thehostcontroller’sanalog-to-digitalconverterconnectstothebq77PL900toacquirethesevalues.Cellbalancingcanbeperformedautonomously,orthehostcontrollercanactivateitindividuallyviaacellbypasspathintegratedintothebq77PL900.InternalcontrolregistersaccessibleviatheI2Cinterfaceconfigurethisoperation.ThemaximumbalancingbypasscurrentissetviaanexternalseriesresistorandtheinternalFET-onresistance(typically400).Optionally,externalbypasscellbalanceFETscanbeusedforincreasedcurrentcapability.APPLICATIONSCordlessPowerToolsBQ78PL114,具有PowerPump电池平衡的PowerLAN网关电池管理控制器,APPLICATIONSMobilityDevices(E-Bike)以上BQ77PL900可以免费索取评估板新晔电子有限公司SerialMicroelectronic新晔电子(香港)有限公司上海公司Tel:021-54667999M:13501671126johnson.fan@serialmicro.com.cncolin.chen@serialmicro.com.cnContact:樊健/陈磊新晔电子(香港)有限公司苏州公司0512-67626852johnson.fan@serialmicro.com.cnContact:樊健/陈磊新晔电子(香港)有限公司深圳公司Tel:0755-83663686M:13632937302wenny.luo@serialmicro.com.cnContact:罗文亮/邵新华667281221072072.pdf667281221072316.pdf