BQ27541DRZT中文资料

1FEATURESAPPLICATIONSDESCRIPTIONTYPICALAPPLICATIONBatteryPackPACK–PROTECTIONICPACK+SCLTSbq27541LDOREG25REGINVccSRPSRNSEBATVssHDQSDAbq27541–DECEMBER2008SingleCellLi-IonBatteryFuelGaugeforBatteryPackIntegration•Smartphones23•BatteryFuelGaugefor1-SeriesLi-IonApplications•PDAs•DigitalStillandVideoCameras•MicrocontrollerPeripheralProvides:•HandheldTerminals–AccurateBatteryFuelGauging•MP3orMultimediaPlayers–InternalTemperatureSensorforSystemTemperatureReporting–SHA-1/HMACAuthenticationTheTexasInstrumentsbq27541Li-Ionbatteryfuel–96BytesofNon-VolatileScratchPadgaugeisamicrocontrollerperipheralthatprovidesFLASHfuelgaugingforsingle-cellLi-Ionbatterypacks.The•BatteryFuelGaugingBasedonPatenteddevicerequireslittlesystemmicrocontrollerfirmwareImpedanceTrack™Technologydevelopmentforaccuratebatteryfuelgauging.Thebq27541resideswithinthebatterypackoronthe–ModelsBatteryDischargeCurveforsystem’smain-boardwithanembeddedbatteryAccurateTime-To-EmptyPredictions(nonremovable).–AutomaticallyAdjustsforBatteryAging,BatterySelf-Discharge,andThebq27541usesthepatentedImpedanceTrack™algorithmforfuelgauging,andprovidesinformationTemperature/RateInefficienciessuchasremainingbatterycapacity(mAh),–Low-ValueSenseResistor(5mΩto20mΩ)state-of-charge(%),run-timetoempty(min.),battery•HDQandI2C™InterfaceFormatsforvoltage(mV),andtemperature(°C).CommunicationwithHostSystemThebq27541alsofeaturesintegratedsupportfor•Small12-pin2,5mm×4mmSONPackagesecurebatterypackauthentication,usingtheSHA-1/HMACauthenticationalgorithm.1Pleasebeawarethatanimportantnoticeconcerningavailability,standardwarranty,anduseincriticalapplicationsofTexasInstrumentssemiconductorproductsanddisclaimerstheretoappearsattheendofthisdatasheet.2ImpedanceTrackisatrademarkofTexasInstruments.3I2CisatrademarkofPhillipsCorporation.PRODUCTIONDATAinformationiscurrentasofpublicationdate.Copyright©2008,TexasInstrumentsIncorporatedProductsconformtospecificationsperthetermsoftheTexasInstrumentsstandardwarranty.Productionprocessingdoesnotnecessarilyincludetestingofallparameters.DEVICEINFORMATIONAVAILABLEOPTIONS1REGIN2BAT345Vcc6VssTSSE1211109SRN8SRP7REG25SCLSDAHDQbq27541SLUS861–DECEMBER2008...........................................................................................................................................................................................×4-mmSON–40°Cto85°CI2C,HDQ(1)bq27541DRZT250(1)bq27541isshippedinI2Cmodebq27541(TOPVIEW)TERMINALFUNCTIONSTERMINALDESCRIPTIONNAMENO.TYPE(1)BAT4ICell-voltagemeasurementinput.ADCinput.Decouplewith0.1μFcapacitor.REG252P2.5VoutputvoltageoftheinternalintegratedLDO.Connectaminimum0.47μFceramiccapacitor.REGIN3PTheinputvoltagefortheinternalintegratedLDO.Connecta0.1μFceramiccapacitor.SCL11ISlaveI2Cserialcommunicationsclockinputlineforcommunicationwithsystem(Slave).Usewith10kΩpull-upresistor(typical).SDA10I/OSlaveI2Cserialcommunicationsdatalineforcommunicationwithsystem(Slave).Open-drainI/O.Usewith10kΩpull-upresistor(typical).SE1OShutdownEnableoutput.Open-drain.HDQ12I/OHDQserialcommunicationsline(Slave).Open-drain.SRN8IAAnaloginputpinconnectedtotheinternalcoulombcounterwhereSRNisnearestthePACK-connection.Connectto5-mΩto20-mΩsenseresistor.SRP7IAAnaloginputpinconnectedtotheinternalcoulombcounterwhereSRPisnearesttheCELL-connection.Connectto5-mΩto20-mΩsenseresistorTS9IAPackthermistorvoltagesense(use103AT-typethermistor).ADCinputVcc5PProcessorpowerinput.Theminimum0.47μFcapacitorconnectedtoREG25shouldbeclosetoVcc.Vss6PDeviceground(1)I/O=Digitalinput/output,IA=Analoginput,P=Powerconnection2SubmitDocumentationFeedbackCopyright©2008,TexasInstrumentsIncorporatedProductFolderLink(s):bq27541ELECTRICALSPECIFICATIONSABSOLUTEMAXIMUMRATINGSDISSIPATIONRATINGSRECOMMENDEDOPERATINGCONDITIONSbq27541–DECEMBER2008overoperatingfree-airtemperaturerange(unlessotherwisenoted)(1)VALUEUNITVIRegulatorinput,REGIN–0.3to24VVCCSupplyvoltagerange–0.3to2.75VVIODOpen-drainI/Opins(SDA,SCL,HDQ)–0.3to6VVBATBATinput,(pin4)–0.3to6VVIInputvoltagerangetoallothers(pins1,7,8,9)–0.3toVCC+0.3VHumanBodyModel(HBM),BATpin1.5ESDkVHumanBodyModel(HBM),allpins2TFFunctionaltemperaturerange–40to100°CTstgStoragetemperaturerange–65to150°C(1)Stressesbeyondthoselistedunderabsolutemaximumratingsmaycausepermanentdamagetothedevice.Thesearestressratingsonly,andfunctionaloperationofthedeviceattheseoranyotherconditionsbeyondthoseindicatedunderrec