SBS 1.1 Compliant Gas Gauge with Impedance Track

1 2 NextGenerationPatentedImpedanceTrack BetterThan1%ErrorOvertheLifetimeofmeasur esandmaintainsanaccuraterecordoftheBatte ryavailablechargeinLi-ionorLi-polymerbat teries ,monitorscapacitychange,battery FlexibleConfigurationfor2to4 SeriesLi-Ionimpedance,open-circuitvoltag e,andothercriticalparametersofthebattery packaswellandreportsandLi-PolymerCellsth einformationtothesystemhostcontrollerove ra (AFE)short-circuitand FullArrayofProgrammableProtectionoverloa dprotection,thebq20z45maximizesFeaturesf unctionalityandsafetywhileminimizingexte rnalcomponentcount,cost,andsizeinsmartba ttery Voltage,Current,andTemperaturecircuits.

2 SatisfiesJEITAG uidelinesTheimplementedImpedanceTrack gasgauging AddedFlexibilitytoHandleMoreComplextechn ologycontinuouslyanalyzesthebatteryCharg ingProfilesimpedance,resultinginsuperior gas-gauging SupportsSHA-1 Authenticationcalculatedwithdischargerat e,temperature,andcellagingallaccountedfo rduringeachstageofevery Availableina38-PinTSSOP(DBT)package NotebookPCs MedicalandTestEquipment PortableInstrumentationAVAILABLEOPTIONSP ACKAGE(1)TA38-PINTSSOP(DBT)Tube38-PINTSS OP(DBT)TapeandReel 40 Cto85 Cbq20z45 DBT(2)bq20z45 DBTR(3)(1)Forthemostcurrentpackageandord eringinformation,seethePackageOptionAdde ndumattheendofthisdocument, (2)Asingletubequantityis50units.

3 (3)Asinglereelquantityis2000units1 Pleasebeawarethatanimportantnoticeconcer ningavailability,standardwarranty, 2009, OverCurrent&Short CircuitProtectionCell VoltageMultiplexerN-Channel FETD rivePre Charge FET&GPOD DrivePower ModeControlSMBDGSRNGSRPASRNASRPGPODZVCHG CHGDSGVC5VC4VC3VC2VC1 SMBCCell BalancingTemperatureMeasurementData FlashMemorySMB Gas GaugingSHA-1 AuthenticationOver & UnderVoltageProtectionVoltageMeasurement Over CurrentProtectionOscillatorChargingAlgor ithmFuse BlowDetection andLogicOverTemperatureProtectionSAFEPFI NTS2TS1 TOUTPMSW atchdogRegulatorsRESETALERTREG33 REG25 VCELL+BATPACKVCCVSSMSRTRBIS

4 Ystem ControlAFE HW ControlPack -RSNS5 m - 20 m +SMBCSMBDbq20z45 GNDVC4VC3VC2VC1 VDDOUTCDbq294xx1 DSG2 PACK311 VCCALERT412 ZVCHGPRES513614 PMSTS2715 VSSPFIN816 REG33 SAFE917 TOUTSMBD101819 VCELL+SMBCNCCHG38 BAT37VC1 VSS3628VC2 RBI3527VC3 REG253426VC4 VSS3325VC5 MRST3224 ASRPGSRN3123 ASRNGSRP3022 RESETVSSVSS292120 GPODTS1bq20z45 SLUS800 (TOPVIEW)2 SubmitDocumentationFeedbackCopyright 2009,TexasInstrumentsIncorporatedProduct FolderLink(s) MARCH2009 PINFUNCTIONSPINI/O(1) , FcapacitortoREG33andVSS9 TOUTPT hermistorbiassupplyoutput10 VCELL+ FcapacitortoVCELL+ ,overloadconditionandwatchdogtimeoutthis pinwill11 ,21,25, , , , , , ,PBatterystackvoltagesenseinput38 CHGOH ighsideN-chanchargeFETgatedrive(1)I=Inpu t,IA=Analoginput,I/O=Input/output,I/OD=I nput/Open-drainoutput,O=Output,OA=Analog output,P=PowerCopyright 2009,TexasInstrumentsIncorporatedSubmitD ocumentationFeedback3 ProductFolderLink(s).

5 Bq20z45 ABSOLUTEMAXIMUMRATINGSRECOMMENDEDOPERATI NGCONDITIONSbq20z45 SLUS800 (unlessotherwisenoted)(1)PINUNITBAT,VCC ,PMS (n)-VC(n+1);n=1,2,3,4 ,VC2,VC3,VC4 ,SMBD,SMBC ,TS2,SAFE,VCELL+,PRES;ALERT (REG25)+ ,GSRN,GSRP,RBI (REG25)+ ,ASRP 1 Vto1 VDSG,CHG,GPOD (BAT)VOUTO utputvoltagerangeTOUT,ALERT,REG33 ,PFIN,SMBD,SMBC50mATAO peratingfree-airtemperaturerange 40 Cto85 CTFF unctionaltemperature 40 Cto100 CTstgStoragetemperaturerange 65 Cto150 C(1) , (unlessotherwisenoted)PINMINNOMMAXUNITVS SS upplyvoltageVCC, (STARTUP)MinimumstartupvoltageVCC,BAT, (n)-VC(n+1).

6 N=1,2,3,405 VVC1,VC2,VC3, ,ASRP ,PMS025VV(GPOD)OutputVoltageRangeGPOD025 VA(GPOD)DrainCurrent(1)GPOD1mAC(REG25) FC(REG33) FC(VCELL+)CellVoltageOutputCapacitorVCEL L+ FC(PACK)PACK inputblockresistor(2)PACK1k (1)Useanexternalresistortolimitthecurren ttoGPODto1mAinhighvoltageapplication.(2) 2009,TexasInstrumentsIncorporatedProduct FolderLink(s) MARCH2009overoperatingfree-airtemperatur erange(unlessotherwisenoted),TA= 40 Cto85 C,V(REG25)= ,V(BAT)=14V,C(REG25)=1 F,C(REG33)= F;typicalvaluesatTA=25 C(unlessotherwisenoted)PARAMETERTESTCOND ITIONSMINTYPMAXUNITSUPPLYCURRENTI(NORMAL )Firmwarerunning550 AI(SLEEP)SleepModeCHGFETon;DSGFETon124 ACHGFEToff;DSGFETon90 ACHGFEToff;DSGFEToff52 AI(SHUTDOWN) ASHUTDOWNWAKE.

7 TA=25 C(unlessotherwisenoted)I(PACK)Shutdownex itatVSTARTUP threshold1 ASRxWAKEFROMSLEEP;TA=25 C(unlessotherwisenoted)Positiveornegativ ewakethresholdV(WAKE) , , (WAKE)=1mV; (WAKE)=0,RSNS1=0,RSNS0=1;V(WAKE)= ;I(WAKE)=1,RSNS1=0,RSNS0=1; (WAKE)=0,RSNS1=1,RSNS0=0;V(WAKE_ACR)Accu racyofV(WAKE)mVV(WAKE)= ;I(WAKE)=1,RSNS1=1,RSNS0=1; (WAKE)=0,RSNS1=1,RSNS0=0;V(WAKE)=9mV; (WAKE)=1,RSNS1=1,RSNS0=1;V(WAKE_TCO)Temp eraturedriftofV(WAKE) CTimefromapplicationofcurrentandt(WAKE)1 10mswakeofbq8040 POWER-ONRESETVIT + VIT-50150250mVactivelowtimeafterpowerupo rtRSTRESET activelowtime100250560 swatchdogresetWATCHDOGTIMERtWDTINTW atchdogstartupdetecttime2505001000mstWDW TW atchdogdetecttime50100150 ;I(REG33 OUT)=0mA;TA=25 C(unlessotherwisenoted) <VCCorBAT<25V;V(REG25)Regulatoroutputvol tageI(REG25 OUT) 16mA; 40 Cto100 CRegulatoroutputchangewithI(REG25 OUT)=2mA; V(REG25 TEMP) 40 Cto100 <VCCorBAT<25V.

8 V(REG25 LINE)Lineregulation310mVI(REG25 OUT)= I(REG25 OUT) 2mA725 V(REG25 LOAD) I(REG25 OUT) 16mA2550drawingcurrentuntilI(REG25 MAX)CurrentLimit54075mAREG25= ;I(REG25 OUT)=0mA;TA=25 C(unlessotherwisenoted) <VCCorBAT<25V;V(REG33)Regulatoroutputvol tageI(REG33 OUT) 25mA; 40 Cto100 CRegulatoroutputchangewithI(REG33 OUT)=2mA; V(REG33 TEMP) 40 Cto100 <VCCorBAT<25V; V(REG33 LINE)Lineregulation310mVI(REG33 OUT)= I(REG33 OUT) 2mA717 V(REG33 LOAD) I(REG33 OUT) 25mA40100 Copyright 2009,TexasInstrumentsIncorporatedSubmitD ocumentationFeedback5 ProductFolderLink(s):bq20z45bq20z45 SLUS800 (continued)overoperatingfree-airtemperat urerange(unlessotherwisenoted),TA= 40 Cto85 C,V(REG25)= ,V(BAT)=14V,C(REG25)=1 F,C(REG33)= F.

9 TypicalvaluesatTA=25 C(unlessotherwisenoted)PARAMETERTESTCOND ITIONSMINTYPMAXUNIT drawingcurrentuntilREG33=3V25100145I(REG 33 MAX)CurrentLimitmAshortREG33toVSS,REG33= 0V1265 THERMISTORDRIVEV(TOUT)OutputvoltageI(TOU T)=0mA;TA=25 CV(REG25)VI(TOUT)=1mA;RDS(on)=(V(REG25)- RDS(on)TOUT passelementresistance50100 V(TOUT))/1mA;TA= 40 Cto100 CVCELL+HIGHVOLTAGETRANSLATIONVC(n)-VC(n+ 1)=0V; 40 Cto100 CV(VCELL+OUT)VC(n)-VC(n+1)= ; 40 Cto100 CinternalAFEreferencevoltage;V(VCELL+REF ) 40 Cto100 CVoltageatPACKpin; V(VCELL+PACK)V(PACK)/18TA= 40 Cto100 CV(PACK)/18V(PACK)/18 VoltageatBATpin; V(VCELL+BAT)V(BAT) V(BAT)/18TA= 40 Cto100 CV(BAT)/18 CMMRC ommonmoderejectionratioVCELL+40dBK={VCEL L+output(VC5=0V;VC4= )-VCELL+output(VC5=0V; )} {VCELL+output(VC2= ;VC1=18V)-VCELL+ (VC5= ;VC1= )} (n)-VC(n+1)=0V;VCELL+=0V.

10 I(VCELL+OUT)DriveCurrenttoVCELL+capacito r1218 ATA= 40 Cto100 CCELL output(VC2=VC1=18V)-V(VCELL+O)CELL offseterror-18-118mVCELL output(VC2=VC1=0V)IVCnLVC(n)pinleakagecu rrentVC1,VC2,VC3,VC4,VC5= ACELLBALANCINGRDS(on)forinternalFETswitc hatR(BAL)internalcellbalancingFETresista nce200400600 VDS=2V;TA=25 CHARDWARESHORTCIRCUITANDOVERLOADPROTECTI ON;TA=25 C(unlessotherwisenoted)VOL=25mV(min)1525 35 OLdetectionthresholdvoltageV(OL)VOL=100m V;RSNS=0,190100110mVaccuracyVOL=205mV(ma x)185205225V(SCC)=50mV(min)305070 SCCdetectionthresholdvoltageV(SCC)V(SCC) =200mV;RSNS=0,1180200220mVaccuracyV(SCC) =475mV(max)428475523V(SCD)= 50mV(min) 30 50 70 SCDdetectionthresholdvoltageV(SCD)V(SCD) = 200mV;RSNS=0,1 180 200 220mVaccuracyV(SCD)= 475mV(max) 428 475 523tdaDelaytimeaccuracy stpdProtectioncircuitpropagationdelay50 sFETDRIVECIRCUIT;TA=25 C(unlessotherwisenoted)V(DSGON)=V(DSG)-V (PACK);V(DSGON)DSGpinoutputonvoltageV(GS )=10M ;DSGandCHGon.