johnson_fan：
BQ77PL900,5至10節鋰離子電池保護和AFE.說明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電池平衡的PowerLAN網關電池管理控制器,APPLICATIONSMobilityDevices(E-Bike)以上BQ77PL900可以免費索取評估板新曄電子有限公司SerialMicroelectronic新曄電子(香港)有限公司上海公司Tel:021-54667999M:13501671126johnson.fan@serialmicro.com.cncolin.chen@serialmicro.com.cnContact:樊健/陳磊新曄電子(香港)有限公司蘇州公司0512-67626852johnson.fan@serialmicro.com.cnContact:樊健/陳磊新曄電子(香港)有限公司深圳公司Tel:0755-83663686M:13632937302wenny.luo@serialmicro.com.cnContact:羅文亮/邵新華667281221072072.pdf667281221072316.pdf