BL4054

BL4054 BELLING | Alldatasheet

Document overview

• Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
• PDF pages: 16

Technical content

m m m m m PPMIC BU www.belling.com.cn BL4054/BL4054B Rev 1.4 Belling Proprietary Information. Unauthorized Photocopy and Duplication Prohibited 5/2009 ©2009 Belling All Rights Reserved BL4054/BL4054B 800mA Standalone Linear Li-Ion Battery Charger with Thermal Regulation in SOT23-5/TSOT23-5

FEATURES

m /circle6B ProgrammableBChargeBCurrentBUpBtoB800mABB /circle6B NoB MOSFET,B SenseB ResistorB orB BlockingB DiodeBRequiredB /circle6B PresetB 4.2VB ChargeB VoltageB withB ±1%B AccuracyB /circle6B ChargeB CurrentB MonitorB OutputB forB GasB GaugingB /circle6B ThermalBRegulationBMaximizesBChargeBRateB WithoutBRiskBofBOverheatingB /circle6B ChargesBSingleBCellBLi%IonBBatteriesBDirectlyB fromBUSBBPortBB /circle6B Over%VoltageBProtectB /circle6B AutomaticBRechargeBB /circle6B ChargeBStatusBOutputBPinBB /circle6B C/10BChargeBTerminationBB /circle6B 25 µABSupplyBCurrentBinBShutdownBB /circle6B 2.9VBTrickleBChargeBThresholdBB /circle6B Soft%StartBLimitsBInrushBCurrentBB /circle6B AvailableBinB5%LeadBSOT%23BPackageB B

APPLICATIONS

B /circle6B CellularBandBSmartBPhonesB /circle6B ChargingBDocksBandBCradlesB /circle6B BlueToothBApplicationsB /circle6B PDAsB /circle6B MP3/MP4/MP5BPlayersB B

DESCRIPTION

m TheB BL4054/BL4054BB isB aB completeB constantB currentB/BconstantBvoltageBlinearBchargerBforBsingleB cellB Lithium%IonB batteries.B NoB externalB senseB resistorB isB needed,B andB noB blockingB diodeB isB requiredBdueBtoBtheBinternalBMOSFETB architecture.B ThermalBfeedbackBregulatesBtheBchargeBcurrentBtoB limitB theB dieB temperatureB duringB highB powerB operationB orB highB ambientB temperature.B TheB chargeBvoltageBisBfixedBatB4.2V,BandBtheBchargeB currentB canB beB programmedB externallyB withB aB singleBresistor.BTheBBL4054/BL4054BBautomaticalB %lyBterminatesBtheBchargeBcycleBwhenBtheBchargeB currentBdropsBtoB1/10BtheBprogrammedBvalueBafterB theBfinalBfloatBvoltageBisBreached.BB B WhenB theB inputB supplyB (wallB adapterB orB USBB supply)B isB removed,B theB BL4054/BL4054BB automaticallyBentersBaBlowBcurrentBstate,BdroppingB theBbatteryBdrainBcurrentBtoBlessBthanB2 µΑ .BTheB BL4054/BL4054BBcanBbeBputBintoBshutdownBmode,B reducingB theB supplyB currentB toB 25 µA.B OtherB featuresB includeB chargeB currentB monitor,B under%voltageBlockout,BautomaticBrechargeBandBaB statusBpinBtoBindicateBchargeBterminationBandBtheB presenceBofBanBinputBvoltage.B B TheB onlyB differenceB betweenB BL4054B andB BL4054BBisBthatBatBpowerBon,BBL4054BwillBcheckB theBbatteryBvoltageBfirst,BitBwillBnotBstartBchargingB unlessB theB batteryB voltageB isB belowB theB auto%rechrageB threshold.B BL4054BB doesB notB performBthisBcheck.BSoBBL4054BBcanBguaranteeB theBhighBbatteryBcapacityBatBallBtime,BwhileBBL4054B canB preventB theB batteryB fromB beingB repeatedlyB chargedBinBsomeBspecificBapplications.B m m

ORDERING INFORMATION

BL4054/BL4054BB–BXX BXBXBXXX m TYPICAL APPLICATION 600mA 4.2V Li-Ion Battery GND PROG BAT V CC BL4054/BL4054B 1.65k 1uF V CC 4.5V to 6.5V m 600mA Application Circuit Package:m RN:mSOT2315mmmmm TRN:mTSOT2315m Features:m P:mStandardm(default,mleadmfree) m C:mCustomized m m TricklemCharge:m T:mTricklemChargem N:mNomTricklemCharge m m FloatmVoltage:m 42:m4.2Vm 43:m4.3Vm 44:m4.4Vm mm

m m m m m PPMIC BU www.belling.com.cn BL4054/BL4054B Rev 1.4 Belling Proprietary Information. Unauthorized Photocopy and Duplication Prohibited 5/2009 ©2009 Belling All Rights Reserved BL4054/BL4054B 800mA Standalone Linear Li-Ion Battery Charger with Thermal Regulation in SOT23-5/TSOT23-5 Absolute Maximum Rating (Note 1) InputBSupplyBVoltageB(V CC )BBBBBBBBBB%0.3VBtoB+10VB PROGBVoltageB %0.3VBtoB+V CC B BATBVoltageB %0.3VBtoB7VB CHRGbB %0.3VBtoB10VB BATBShort%CircuitBDurationB ContinuousB BATBPinBCurrentB 800mAB PROGBPinBCurrentBB BBBBBBBBB800 µAB MaximumBJunctionBTemperatureBBBBBBBBBBB125°CBBBBBBB OperatingBTemperatureBRange (Note2) B %40°CBtoB85°CB StorageBTemperatureBRangeB %65°CBtoB125°CB LeadBTemperatureB(Soldering,B10s)B BBBB300°C m

Package Information

Thermal Resistance (Note 4) Packagem Ө JA m Ө JC m TSOT2315m 220 °C/Wm 110°C/Wm SOT2315m 250 °C/Wm 130°C/Wm Note 1: AbsoluteBMaximumBRatingsBareBthoseBvaluesBbeyondBwhichBtheBlifeBofBaBdeviceBmayBbeBimpaired.B Note 2: TheBBL4054/BL4054BBisBguaranteedBtoBmeetBperformanceBspecificationsBfromB0°CBtoB70°C.BSpecificationsBoverBtheB–40°CBtoB 85°CBoperatingBtemperatureBrangeBareBassuredBbyBdesign,BcharacterizationBandBcorrelationBwithBstatisticalBprocessBcontrols.B Note 3: BX:BProductBCode(BL4054:B,BL4054B:BB)BV:BVoltageBCode(4.2V:A,4.3V:B,4.4V:C)BY:BYearBofBManufacturing(9:2009)BW:BWeekBofB Manufacturing(W:A%Z,Ba%z).BContactBBellingBmarketingBforBmoreBinformationBinBdetail.B Note 4: BThermalBResistanceBisBspecifiedBwithBapproximatelyB1BsquareBofB1BozBcopper.B TSOT23-5/SOT23-5 TOP VIEW CHRGb GND BAT PROG V CC MARKING m PartBNumberB TopBMarkB TempBRangeB BL4054%4.2B BBABYBW (Note3) B BL4054%4.3B BBBBYBWB BL4054%4.4B BBCBYBWB BL4054B%4.2 B BBABYBWB BL4054B%4.3 B BBBBYBWB BL4054B%4.4 B BBCBYBWB %40°CBtoB+85°CB

m m m m m PPMIC BU www.belling.com.cn BL4054/BL4054B Rev 1.4 Belling Proprietary Information. Unauthorized Photocopy and Duplication Prohibited 5/2009 ©2009 Belling All Rights Reserved BL4054/BL4054B 800mA Standalone Linear Li-Ion Battery Charger with Thermal Regulation in SOT23-5/TSOT23-5 Pin Description m PIN NAME FUNCTION 1B CHRGbB Open%DrainBChargeBStatusBOutput.BWhenBtheBbatteryBisB charging,BtheBCHRGbBpinBisBpulledBlowBbyBanBinternalB N%channelB MOSFET.B WhenB theB chargeB cycleB isB completed,BaBweakBpull%downBofBapproximatelyB12 µABisB connectedBtoBtheBCHRGbBpin,BindicatingBanB“ACBpresent”B condition.B WhenB theB BL4054/BL4054BB detectsB anB under%voltageBlockoutBcondition,BCHRGbBisBforcedBhighB impedance.B 2B GNDB GroundB 3B BATB ChargeBCurrentBOutput.BProvidesBchargeBcurrentBtoBtheB batteryBandBregulatesBtheBfinalBfloatBvoltageBtoB4.2V.BAnB internalBprecisionBresistorBdividerBfromBthisBpinBsetsBtheB floatBvoltageBwhichBisBdisconnectedBinBshutdownBmode.B 4B V CC B PositiveB InputB SupplyB Voltage.B ProvidesB powerB toB theB charger.BV CC BcanBrangeBfromB4.25VBtoB6.5VBandBshouldBbeB bypassedBwithBatBleastBaB1 µFBcapacitor.BWhenBV CC BdropsB toB withinB 30mVB ofB theB BATB pinB voltage,B theB BL4054/BL4054BBentersBshutdownBmode,BdroppingBI BAT BtoB lessBthanB2 µA. 5B PROGB ChargeBCurrentBProgram,BChargeBCurrentBMonitorBandB ShutdownBPin.BTheBchargeBcurrentBisBProgrammedBbyB connectingBaB1%Bresistor,BR PROG ,BfromBthisBpinBtoBground.B WhenBchargingBinBconstant%currentBmode,BthisBpinBservosB toB1V.BInBallBmodes,BtheBvoltageBonBthisBpinBcanBbeBusedBtoB measureBtheBchargeBcurrentBusingBtheBfollowingBformula:BB IBAT B=B(V PROGB/BR PROG )B•B1000B TheB PROGB pinB canB alsoB beB usedB toB shutB downB theB charger.BDisconnectingBtheBProgramBresistorBfromBgroundB allowsBaB3 µABcurrentBtoBpullBtheBPROGBpinBhigh.BWhenBitB reachesB theB 1.21VB shutdownB thresholdB voltage,B theB chargerBentersBshutdownBmode,BchargingBstopsBandBtheB inputB supplyB currentB dropsB toB 25 µA.B ThisB pinB isB alsoB clampedB toB approximatelyB 2.4V.B DrivingB thisB pinB toB voltagesBbeyondBtheBclampBvoltageBwillBdrawBcurrentsBasB highBasB1.5mA.BReconnectingBR PROG BtoBgroundBwillBreturnB theBchargerBtoBnormalBoperation. m m m m m m m m m m

m m m m m PPMIC BU www.belling.com.cn BL4054/BL4054B Rev 1.4 Belling Proprietary Information. Unauthorized Photocopy and Duplication Prohibited 5/2009 ©2009 Belling All Rights Reserved BL4054/BL4054B 800mA Standalone Linear Li-Ion Battery Charger with Thermal Regulation in SOT23-5/TSOT23-5 Block Diagram m ++++ ---- ++ ++ -- -- ++++-- -- ++ ++ -- -- ++ ++ -- -- ++ ++ -- -- ++ ++ -- -- ++++-- -- REF 1.21V 7.0V OV_SHDN 120 oC TDIE SHDN STANDBY TO BAT 2.9V OVP TA CA CHRGb 5µΑ 3µΑ VCC 0.1V VA MA 1000x 5 2GND PROG RPROG 4VCC 3BAT

m m m m m PPMIC BU www.belling.com.cn BL4054/BL4054B Rev 1.4 Belling Proprietary Information. Unauthorized Photocopy and Duplication Prohibited 5/2009 ©2009 Belling All Rights Reserved BL4054/BL4054B 800mA Standalone Linear Li-Ion Battery Charger with Thermal Regulation in SOT23-5/TSOT23-5 Electrical Characteristics (Note 5) (V CC m=m5V,mT Am=m25°C,munlessmotherwisemnoted.)m Symbol Parameter Conditions Min Typ Max ISPLYCHRG B ChargeBModeBSupplyBCurrentB(Note6) B RPROG =2k ΩBBBBBBBBBBBBBBBBBB RPROG B=10kΩ B B BB300 µAB2000 µABB 2000 µAB IBATCHRG B ChargeBModeBBatteryBCurrentB RPROG B=2kΩBBBBBBBBBBBBBBBBBBB RPROG B=10kΩ B 465mABBBBBBBB 93mAB 500mABBBBB 100mA B 535mABBBBBBBB 107mA B VPROGCHRG B PROGBPinBVoltageB RPROG B=2kΩBBBBBBBBBBBBBBBBBBB RPROG B=10kΩ B 0.93VBBBBBB 0.93VB 1VBBBBBBBBBBBBBBB 1VB 1.07VBBBBBB 1.07VB ISPLYSTBY B StandbyBModeBSupplyBCurrentB B B 100 µAB 500 µAB BIBATSTBY B StandbyBModeBBatteryBCurrentB B 0B B%2.5 µAB B%6µAB ISPLYMSD B ManualBShutdownBModeBSupplyBCurrentB B B B 90 µAB IBATMSD B ManualBShutdownBModeBBatteryBCurrentB B B%2µAB 0B 2µAB VPROGCLMP B PROGBPinBClampBVoltageB B 2VB B 3VB ISPLYASD B AutomaticBShutdownBModeBSupplyB CurrentB B B 25 µAB 50 µAB IBATASD B AutomaticBShutdownBModeBBatteryB CurrentB B B%2µAB 0B 2µAB ISPLYUVLO B UVLOBModeBSupplyBCurrentB B B 25 µAB 50 µAB IBATUVLO B UVLOBModeBBatteryBCurrentB B B%2µAB B 2µAB IBATSLEEP B SleepBModeBBatteryBCurrentB B B%1µAB B 1µAB VFLOAT B FloatBVoltageB B 4.158V B 4.2VB 4.242V B ITRIKL B TrickleBChargeBCurrentB RPROG B=2kΩBBBBBBBBBBBBBBBBBBB RPROG B=10kΩ B 20mABBBBBBBBBBB 5mAB 50mABBBBBBBBB 10mAB 70mABBBBB 15mAB VTRIKL B TrickleBChargeBThresholdB B 2.8VB 2.9VB 3VB VTRIKL,BHYS BB TrickleBChargeBHysteresisB B 60mVB 100mV B 150mV B VUVLO B UVLOBThresholdB B 3.7VB 3.9VB 4.1VB VUVLO,BHYS B UVLOBHysteresisB B 150mV B 200mV B 300mV B VOVP B InputBOver%VoltageBProtectBThresholdB B 6.8VB 7VB 7.2VB VOVP,BHYS B InputBOver%VoltageBProtectBHysteresisB B B 200mV B B

m m m m m PPMIC BU www.belling.com.cn BL4054/BL4054B Rev 1.4 Belling Proprietary Information. Unauthorized Photocopy and Duplication Prohibited 5/2009 ©2009 Belling All Rights Reserved BL4054/BL4054B 800mA Standalone Linear Li-Ion Battery Charger with Thermal Regulation in SOT23-5/TSOT23-5 VMSD,BRISE BB ManualBShutdownBThreshold,BPROGB risingB B 1.15VB 1.21VB 1.3VB VMSD,BFALL B ManualBShutdownBThreshold,BPROGB fallingB B 0.95VB 1.0VB 1.05VB VASD,BRISE B AutomaticBShutdownBThreshold,BBATB risingB B 5mVB 30mVB 50mVB VASD,BFALL B AutomaticBShutdownBThreshold,BBATB fallingB B 70mVB 100mV B 140mV B ITERM B C/10BTerminationBCurrentBThresholdB B 85mVB 100mV B 115mV B VRECHRG B AutoBRechargeBBatteryBVoltageB B 4VB 4.05VB 4.1VB ICHRGb B CHRGbBPinBWeakBPull%downBCurrentB B 8µAB 12 µAB 35 µAB VCHRGb B CHRGbBPinBOutputBLowBVoltageB B B 0.35VB 0.6VB TLIM B JunctionBTemperatureBInBConstantB TemperatureBModeB B B 120°C B B RON B PowerBFETBONBResistanceB B B 600mΩ B B TSS B Soft%StartBTimeB R PROG B=2kΩBBBBBBBBBBBBBBBBBBBBB 50 µsB B TRECHRG B RechargeBComparatorBFilterBTimeB B 0.75ms B 2msB 4.5msB TTERM B TerminationBComparatorBFilterBTimeB B 0.4ms B 1msB 2.5msB IPROG B PROGBPinBPull%upBCurrentB B B 3µAB B Note 5: 100%BproductionBtestBatB+25°C.BBSpecificationsBoverBtheBtemperatureBrangeBareBguaranteedBbyBdesignBandBcharacterization.B Note 6: SupplyBcurrentBincludesBPROGBpinBcurrentB(approximatelyB100 µA)BbutBdoesBnotBincludeBanyBcurrentBdeliveredBtoBtheBbatteryB throughBtheBBATBpinB(approximatelyB100mA). Typical Performance Characteristics 0.990 0.995 1.000 1.005 1.010 B B VPROG (V) VCC (V) PRO G Pin Voltage vs Supply Voltage (Constant Current M ode) VCC =5V VBAT =4V TA=25 °C RPROG =10K %50 %25 0 25 50 75 100 1.0000 1.0025 1.0050 1.0075 1.0100 1.0125 1.0150 1.0175 1.0200 B B VPROG (V) TEMPERATURE( °C) P R O G P in V o ltag e v s Tem p eratu re VCC =5V VBAT =4V RPROG =10K 100 200 300 400 500 600 B B IBAT (mA) VPROG (V) C harge Current vs PRO G Pin Voltage VCC =5V TA=25 °C RPROG =2K m

m m m m m PPMIC BU www.belling.com.cn BL4054/BL4054B Rev 1.4 Belling Proprietary Information. Unauthorized Photocopy and Duplication Prohibited 5/2009 ©2009 Belling All Rights Reserved BL4054/BL4054B 800mA Standalone Linear Li-Ion Battery Charger with Thermal Regulation in SOT23-5/TSOT23-5 Typical Performance Characteristics %50 %25 0 25 50 75 100 125 2.7 3.0 3.3 3.6 3.9 4.2 4.5 B B IPROG (µA) TEMPERATURE( °C) PROG Pin Pull-Up Current vs Tem perature and Supply Voltage VCC =6.5V VCC =4.2V VBAT =4.3V VPROG =0V 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 B B IPROG (µΑ ) VPROG (V) PROG Pin Current vs PRO G Pin Voltage (Pull-Up Current) VCC =5V VBAT =4.3V TA=25 °C %300 %250 %200 %150 %100 %50 B B IPROG (µΑ ) VPROG (V) PRO G Pin Current vs PR O G Pin Voltage (Clam p Current) VCC =5V VBAT =4.3V TA=25 °C m m B 0 100 200 300 400 500 600 4.15 4.17 4.19 4.21 4.23 4.25 B B VFLOAT (V) IBAT (mA) R egulated O utput (Float) Voltage vs C harge C urrent VCC =5V TA=25 °C RPROG =1.25K %50 %25 0 25 50 75 100 4.185 4.190 4.195 4.200 4.205 4.210 4.215 B B VFLOAT (V) TEMPERATURE( °C) R eg ulated O utput (F lo at) V oltage vs Tem perature VCC =5V RPROG =10K 4.185 4.190 4.195 4.200 4.205 4.210 4.215 B B VFLOAT (V) VCC (V) R egulated O utput (Float) V oltage vs S upply V oltage TA=25 °C RPROG =10K m m m 0 1 2 3 4 5 6 7 B B ICHRGb (mA) VCHRGb (V) CHRGb Pin I-V Curve (Strong Pull-Down State) VCC =5V VBAT =4V TA=25 °C %50 %25 0 25 50 75 100 125 B B ICHRGb (mA) TEMPERATURE( °C) CHRG b Pin Current vs Tem perature (Strong Pull-Down State) VCC =5V VBAT =4V VCHRGb =1V 0 1 2 3 4 5 6 7 B B ICHRGb (µA) VCHRGb (V) CHRGb Pin I-V Curve (W eak Pull-Down State) VCC =5V VBAT =4.3V TA=25 °C m m m

m m m m m PPMIC BU www.belling.com.cn BL4054/BL4054B Rev 1.4 Belling Proprietary Information. Unauthorized Photocopy and Duplication Prohibited 5/2009 ©2009 Belling All Rights Reserved BL4054/BL4054B 800mA Standalone Linear Li-Ion Battery Charger with Thermal Regulation in SOT23-5/TSOT23-5 Typical Performance Characteristics %50 %25 0 25 50 75 100 125 B B ICHRGb (µΑ) TEMPERATURE( °C) CHRGb Pin Current vs Tem perature (W eak Pull-Down State) VCC =5V VBAT =4.3V VCHRGb =5V %50 %25 0 25 50 75 100 125 B B ITRIKL (mA) TEMPERATURE( °C) Trickle Charge Current vs Tem perature RPROG =2K RPROG =10K VCC =5V VBAT =2.5V B B ITRIKL (mA) VCC (V) Trickle Charge Current vs Supply Voltage RPROG =2K RPROG =10K VBAT =2.5V TA=25 °C m m m %50 %25 0 25 50 75 100 125 2.800 2.825 2.850 2.875 2.900 2.925 2.950 2.975 3.000 B B VTRIKL (V) TEMPERATURE( °C) Trickle C harge Threshold vs Tem perature VCC =5V RPROG =10K 100 200 300 400 500 600 B B IBAT (mA) VBAT (V) C harge C urrent vs Battery Voltage VCC =5V RPROG =2K TA=25 °C 100 200 300 400 500 600 B B IBAT (mA) VCC (V) RPROG =2K RPROG =10K VBAT =4V TA=25 °C C harge C urrent vs Supply Voltage m m m %50 %25 0 25 50 75 100 125 150 100 200 300 400 500 600 B B IBAT (mA) TEMPERATURE( °C) RPROG =10K RPROG =2K VCC =5V VBAT =4V Charge Current vs A m bient Tem perature %50 %25 0 25 50 75 100 125 3.99 4.01 4.03 4.05 4.07 4.09 4.11 B B VRECHRG (V) TEMPERATURE( °C) VCC =5V RPROG =10K Recharge Voltage Threshold vs Tem perature %50 %25 0 25 50 75 100 125 350 400 450 500 550 600 650 700 B B RDS(ON) (m Ω ) TEMPERATURE( °C) Power FET "ON" Resistance vs Tem perature VCC =4.2V IBAT =100mA RPROG =2K

m m m m m PPMIC BU www.belling.com.cn BL4054/BL4054B Rev 1.4 Belling Proprietary Information. Unauthorized Photocopy and Duplication Prohibited 5/2009 ©2009 Belling All Rights Reserved BL4054/BL4054B 800mA Standalone Linear Li-Ion Battery Charger with Thermal Regulation in SOT23-5/TSOT23-5 Operation TheB BL4054/BL4054BB isB aB singleB cellB Lithium%IonBbatteryBchargerBusingBaBconstantB currentB/BconstantBvoltageBalgorithm.BItBcanB deliverB upB toB 800mAB ofB chargeB currentB (usingBaBgoodBthermalBPCBBlayout)BwithBaB finalBfloatBvoltageBaccuracyBofB 1%.BTheB BL4054/BL4054BB includesB anB internalB P%channelB powerB MOSFETB andB thermalB regulationB circuitry.B NoB blockingBdiodeB orB externalBcurrentBsenseBresistorBisBrequired;B thus,BtheBbasicBchargerBcircuitBrequiresBonlyB twoBexternalBcomponents.BFurthermore,BtheB BL4054/BL4054BBisBcapableBofBoperatingB fromBaBUSBBpowerBsource.BB B Normal Charge Cycle ABchargeBcycleBbeginsBwhenBtheBvoltageBatB theBV CC BpinBrisesBaboveBtheBUVLOBthresholdB levelB andB aB 1%B programB resistorB isB connectedBfromBtheBPROGBpinBtoBgroundBorB whenBaBbatteryBisBconnectedBtoBtheBchargerB output.BIfBtheBBATBpinBisBlessBthanB2.9V,BtheB chargerBentersBtrickleBchargeBmode.BInBthisB mode,B theB BL4054/BL4054BB suppliesB approximatelyB1/10BtheBprogrammedBchargeB currentBtoBbringBtheBbatteryBvoltageBupBtoBaB safeBlevelBforBfullBcurrentBcharging.BB B WhenBtheBBATBpinBvoltageBrisesBaboveB2.9V,B theBchargerBentersBconstant%currentBmode,B whereBtheBprogrammedBchargeBcurrentBisB suppliedBtoBtheBbattery.BIfBtheBbatteryBvoltageB isBaboveB2.9VBatBpower%on,BBL4054BBentersB theB constant%currentB modeB immediately,B whileBBL4054BwillBperformBoneBmoreBcheck.B IfB theB batteryB voltageB isB belowB theB auto%rechargeBthreshold,BBL4054BentersBtheB constantBcurrentBmode,BotherwiseBitBgoesBtoB standbyBmode.BThisBisBtheBonlyBdifferenceB betweenBtheBBL4054BandBBL4054B.BReferB toBFigureB1aBandB1bBforBmoreBdetails. B WhenBtheBBATBpinBapproachesBtheBfinalBfloatB voltageB(4.2V),BtheBBL4054/BL4054BBentersB constant%voltageB modeB andB theB chargeB currentB beginsB toB decrease.B WhenB theB chargeB currentB dropsB toB 1/10B ofB theB programmedBvalue,BtheBchargeBcycleBends.BB Programming Charge Current TheBchargeBcurrentBisBprogrammedBusingBaB singleBresistorBfromBtheBPROGBpinBtoBground.B TheBbatteryBchargeBcurrentBisB1000BtimesB theB currentB outB ofB theB PROGB pin.B TheB programBresistorBandBtheBchargeBcurrentBareB calculatedBusingBtheBfollowingBequations:BB B CHG PROG I V1000R = BBB PROG CHG R V1000I = B B TheBchargeBcurrentBoutBofBtheBBATBpinBcanB beBdeterminedBatBanyBtimeBbyBmonitoringBtheB PROGB pinB voltageB usingB theB followingB equation:BB B 1000R VI PROG PROG BAT •= B Charge Termination AB chargeB cycleB isB terminatedB whenB theB chargeBcurrentBfallsBtoB1/10BtheBprogrammedB valueBafterBtheBfinalBfloatBvoltageBisBreached.B ThisB conditionB isB detectedB byB usingB anB internal,BfilteredBcomparatorBtoBmonitorBtheB PROGBpin.BWhenBtheBPROGBpinBvoltageB fallsBbelowB100mV BforBlongerBthanBT TERM B (typicallyB1ms),BchargingBisBterminated.BTheB chargeB currentB isB latchedB offB andB theB BL4054/BL4054BB entersB standbyB mode,B whereB theB inputB supplyB currentB dropsB toB 100 µA.B(Note:BC/10BterminationBisBdisabledB inBtrickleBchargingBmode).BB B WhenBcharging,BtransientBloadsBonBtheBBATB

m m m m m PPMIC BU www.belling.com.cn BL4054/BL4054B Rev 1.4 Belling Proprietary Information. Unauthorized Photocopy and Duplication Prohibited 5/2009 ©2009 Belling All Rights Reserved 10 m BL4054/BL4054B 800mA Standalone Linear Li-Ion Battery Charger with Thermal Regulation in SOT23-5/TSOT23-5 pinBcanBcauseBtheBPROGBpinBtoBfallBbelowB 100mVBforBshortBperiodsBofBtimeBbeforeBtheB DCBchargeBcurrentBhasBdroppedBtoB1/10BtheB programmedB value.B TheB 1msB filterB timeB TERM )B onB theB terminationB comparatorB ensuresBthatBtransientBloadsBofBthisBnatureB doB notB resultB inB prematureB chargeB cycleB termination.B OnceB theB averageB chargeB currentBdropsBbelowB1/10BtheBprogrammedB value,BtheBBL4054/BL4054BBterminatesBtheB chargeBcycleBandBceasesBtoBprovideBanyB currentBthroughBtheBBATBpin.BInBthisBstate,BallB loadsBonBtheBBATBpinBmustBbeBsuppliedBbyB theBbattery.BB B TheBBL4054BconstantlyBmonitorsBtheBBATB pinBvoltageBinBstandbyBmode.BIfBthisBvoltageB dropsBbelowBtheB4.05VBrechargeBthresholdB RECHRG ),BanotherBchargeBcycleBbeginsBandB currentBisBonceBagainBsuppliedBtoBtheBbattery.B ToBmanuallyBrestartBaBchargeBcycleBwhenBinB standbyBmode,BtheBinputBvoltageBmustBbeB removedBandBreapplied,BorBtheBchargerBmustB beB shutB downB andB restartedB usingB theB PROGBpin.BFigureB1aBandB1bBshowsBtheB stateBdiagramBofBaBtypicalBchargeBcycle.B B 1/10 FULL CURRENT CHRGb:STRONG PULL-DOWN FULL CURRENT CHRGb:STRONG PULL-DOWN NO CHARGE CURRENT CHRGb:WEAK PULL-DOWN 2.9V<BAT<4.05V BAT < 2.9V BAT > 2.9V PROG < 100mV 2.9V < BAT < 4.05V ICC DROPS TO <25uA CHRGb:Hi-Z IN UVLO WEAK PULL-DOWN OTHERWISE POWER ON PROG RECONNECTED OR UVLO CONDITION STOPS PROG FLOATED OR UVLO CONDITION BAT > 4.05V m Figure1a.BStateBDiagramBofBBL4054BChargeBCycleB B 1/10 FULL CURRENT CHRGb:STRONG PULL-DOWN FULL CURRENT CHRGb:STRONG PULL-DOWN NO CHARGE CURRENT CHRGb:WEAK PULL-DOWN 2.9V<BAT<4.05V BAT < 2.9V BAT > 2.9V PROG < 100mV 2.9V < BAT < 4.05V ICC DROPS TO <25uA CHRGb:Hi-Z IN UVLO WEAK PULL-DOWN OTHERWISE POWER ON PROG RECONNECTED OR UVLO CONDITION STOPS PROG FLOATED OR UVLO CONDITION m m Figure1b.BStateBDiagramBofBBL4054BBChargeBCycleB Charge Status Indicator (CHRGb) B TheBchargeBstatusBoutputBhasBthreeBdifferentB states:B strongB pull%downB (~10mA),B weakB pull%downB (~12 µA)B andB highB impedance.B TheBstrongBpull%downBstateBindicatesBthatB theBBL4054/BL4054BBisBinBaBchargeBcycle.B OnceBtheBchargeBcycleBhasBterminated,BtheB pinB stateB isB determinedBbyB under%voltageB lockoutB conditions.B AB weakB pull%downB indicatesB thatB V CC B meetsB theB UVLOB conditionsB andB theB BL4054/BL4054BB isB readyBtoBcharge.BHighBimpedanceBindicatesB thatB theB BL4054/BL4054BB isB inB underB voltageB lockoutBmode:B eitherB V CC B isB lessB thanB100mVBaboveBtheBBATBpinBvoltageBorB insufficientBvoltageBisBappliedBtoBtheBV CC Bpin.B AB microprocessorB canB beB usedB toB distinguishBbetweenBtheseBthreeBstates—theB applicationBcircuitBofBthisBmethodBisBshownBinB theBTypicalBApplicationsBsection.BB BB Manual Shutdown AtB anyB pointB inB theB chargeB cycle,B theB BL4054/BL4054BBcanBbeBputBintoBshutdownB modeBbyBremovingBR PROG BthusBfloatingBtheB

m m m m m PPMIC BU www.belling.com.cn BL4054/BL4054B Rev 1.4 Belling Proprietary Information. Unauthorized Photocopy and Duplication Prohibited 5/2009 ©2009 Belling All Rights Reserved 11 m BL4054/BL4054B 800mA Standalone Linear Li-Ion Battery Charger with Thermal Regulation in SOT23-5/TSOT23-5 PROGBpin.BThisBreducesBtheBbatteryBdrainB currentBtoBlessBthanB2 µABandBtheBsupplyB currentBtoBlessBthanB50 µA.BABnewBchargeB cycleBcanBbeBinitiatedBbyBreconnectingBtheB programBresistor.BB B InBmanualBshutdown,BtheBCHRGbBpinBisBinBaB weakBpull%downBstateBasBlongBasBV CC BisBhighB enoughB toB exceedB theB UVLOB conditions.B TheBCHRGbBpinBisBinBaBhighBimpedanceB stateBifBtheBBL4054/BL4054BBisBinBunderB voltageBlockoutBmode:BeitherBV CC BisBwithinB 100mVBofBtheBBATBpinBvoltageBorBinsufficientB voltageBisBappliedBtoBtheBV CC Bpin.B B Over-Voltage Protect TheB BL4054/BL4054BB hasB anB internalB Over%VoltageBProtectBcomparator,BonceBtheB inputBvoltageBV CC BrisesBaboveB7VB(V OVP ),BthisB comparatorBwillBshutBdownBtheBchip.BThisB featureBcanBpreventBtheBBL4054/BL4054BB fromBtheBover%voltageBstressBdueBtoBtheBinputB transientBatBhotBplugBin.BInBthisBstate,BtheB CHRGbBpinBwillBbeBhighBimpedance.BOnceB theBV CC BfallsBbackBtoBsafeBrangeB(V OVP B%BV OVP,B HYS ),BnormalBoperationBcontinues.B B Automatic Recharge B OnceBtheBchargeBcycleBisBterminated,BtheB BL4054/BL4054BBcontinuouslyBmonitorsBtheB voltageBonBtheBBATBpinBusingBaBcomparatorB withBaB2msBfilterBtimeB(T RECHRG ).BABchargeB cycleBrestartsBwhenBtheBbatteryBvoltageBfallsB belowB 4.05VB (whichB correspondsB toB approximatelyB80%BtoB90%BbatteryBcapacity).B ThisBensuresBthatBtheBbatteryBisBkeptBatBorB nearB aB fullyB chargedB conditionB andB eliminatesB theB needB forB periodicB chargeB cycleB initiations.B CHRGbB outputB entersB aB strongB pull%downB stateB duringB rechargeB cycles.B B Applications Information Stability Considerations TheBconstant%voltageBmodeBfeedbackBloopB isB stableB withoutB anB outputB capacitorB providedB aB batteryB isB connectedB toB theB chargerBoutput.BWithBnoBbatteryBpresent,BanB outputBcapacitorBisBrecommendedBtoBreduceB rippleBvoltage.BWhenBusingBhighBvalue,BlowB ESRBceramicBcapacitors,BitBisBrecommendedB toB addB aB 1 Ω resistorB inB seriesB withB theB capacitor.BNoBseriesBresistorBisBneededBifB tantalumBcapacitorsBareBused.BB B InBconstant%currentBmode,BtheBPROGBpinBisB inBtheBfeedbackBloop,BnotBtheBbattery.BTheB constant%currentBmodeBstabilityBisBaffectedB byBtheBimpedanceBatBtheBPROGBpin.BWithBnoB additionalBcapacitanceBonBtheBPROGBpin,B theBchargerBisBstableBwithBprogramBresistorB valuesBasBhighBasB20k.BHowever,BadditionalB capacitanceB onB thisB nodeB reducesB theB maximumBallowedBprogramBresistorBthusBitB shouldBbeBavoided.BB B Average,BratherBthanBinstantaneous,BchargeB currentBmayBbeBofBinterestBtoBtheBuser.BForB example,B ifB aB switchingB powerB supplyB operatingBinBlowBcurrentBmodeBisBconnectedB inB parallelB withB theB battery,B theB averageB currentBbeingBpulledBoutBofBtheBBATBpinBisB typicallyB ofB moreB interestB thanB theB instantaneousB currentB pulses.B InB suchB aB case,BaBsimpleBRCBfilterBcanBbeBusedBonBtheB PROGBpinBtoBmeasureBtheBaverageBbatteryB currentBasBshownBinBFigureB2.BAB10kBresistorB hasBbeenBaddedBbetweenBtheBPROGBpinB andBtheBfilterBcapacitorBtoBensureBstability.BB B Thermal Limiting AnBinternalBthermalBfeedbackBloopBreducesB theBprogrammedBchargeBcurrentBifBtheBdieB

m m m m m PPMIC BU www.belling.com.cn BL4054/BL4054B Rev 1.4 Belling Proprietary Information. Unauthorized Photocopy and Duplication Prohibited 5/2009 ©2009 Belling All Rights Reserved 12 m BL4054/BL4054B 800mA Standalone Linear Li-Ion Battery Charger with Thermal Regulation in SOT23-5/TSOT23-5 temperatureBattemptsBtoBriseBaboveBaBpresetB valueBofBapproximatelyB120 °C.BThisBfeatureB protectsB theB BL4054/BL4054BB fromB excessiveBtemperatureBandBallowsBtheBuserB toBpushBtheBlimitsBofBtheBpowerBhandlingB capabilityBofBaBgivenBcircuitBboardBwithoutB riskBofBdamagingBtheBBL4054/BL4054B.BTheB chargeB currentB canB beB setB accordingB toB typicalB (notB worst%case)B ambientB temperatureB withB theB assuranceB thatB theB chargerB willB automaticallyB reduceB theB currentBinBworst%caseBconditions.B PROG BL4054 GND RPROG CFILTER 10k CHARGE CURRENT MONITOR CIRCUITRY B FigureB2.BIsolatingBCapacitiveBLoadBonBPROGBPinB B Power Dissipation TheB conditionsB thatB causeB theB BL4054/BL4054BBtoBreduceBchargeBcurrentB throughB thermalB feedbackB canB beB approximatedB byB consideringB theB powerB dissipatedBinBtheBIC.BNearlyBallBofBthisBpowerB dissipationB isB generatedB byB theB internalB MOSFET—thisB isB calculatedB toB beB approximately:BB B BATBATCCD I)VV(P •−= B B whereBP DBisBtheBpowerBdissipated,BV CC BisBtheB inputB supplyB voltage,B V BAT BisB theB batteryB voltageBandBIBAT BisBtheBchargeBcurrent.BTheB approximateBambientBtemperatureBatBwhichB theBthermalBfeedbackBbeginsBtoBprotectBtheB ICBis:B JADA PC120T θ•−°= B JABATBATCCA I)VV(C120T θ••−−°= B B Example:B AnB BL4054/BL4054BB operatingB fromBaB5VBUSBBsupplyBisBprogrammedBtoB supplyB 400mAB full%scaleB currentB toB aB dischargedBLi%IonBbatteryBwithBaBvoltageBofB 3.75V.B AssumingB θJA B isB 150 °C/W,B theB ambientB temperatureB atB whichB theB BL4054/BL4054BBwillBbeginBtoBreduceBtheB chargeBcurrentBisBapproximately:B B W/C150mA400)V75. 3V5 (C120TA °••−−°= C45TA °= B B TheBBL4054/BL4054BBcanBbeBusedBaboveB °CBambient,BbutBtheBchargeBcurrentBwillBbeB reducedB fromB 400mA.B TheB approximateB currentBatBaBgivenBambientBtemperatureBcanB beBapproximatedBby:B B JABATCC A BAT )VV( TC120I θ•− −°= B B UsingB theB previousB exampleB withB anB ambientBtemperatureBofB60 °C,BtheBchargeB currentBwillBbeBreducedBtoBapproximately:B B mA320W/C150)V75. 3V5 ( C60C120IBAT =°•− °−°= B B Moreover,BwhenBthermalBfeedbackBreducesB theBchargeBcurrent,BtheBvoltageBatBtheBPROGB pinB isB alsoB reducedB proportionallyB asB discussedBinBtheBOperationBsection.BB B ItB isB importantB toB rememberB thatB BL4054/BL4054BBapplicationsBdoBnotBneedB toB beB designedB forB worst%caseB thermalB conditionsBsinceBtheBICBwillBautomaticallyB reduceBpowerBdissipationBwhenBtheBjunctionB temperatureBreachesBapproximatelyB120 °C.B B Thermal Considerations BecauseBofBtheBsmallBsizeBofBtheBThinSOTB package,BitBisBveryBimportantBtoBuseBaBgoodB

**Table 1. Measured Thermal Resistance (2-Layer Board*)** Table 2. Measured Thermal Resistance (4-Layer Board

m m m m m PPMIC BU www.belling.com.cn BL4054/BL4054B Rev 1.4 Belling Proprietary Information. Unauthorized Photocopy and Duplication Prohibited 5/2009 ©2009 Belling All Rights Reserved 14 m BL4054/BL4054B 800mA Standalone Linear Li-Ion Battery Charger with Thermal Regulation in SOT23-5/TSOT23-5 Typical Applications PROG BL4054 BL4054B GND BAT V CC 1uF Li-Ion CELL 500mA 3 Full Featured Single Cell Li Full Featured Single Cell Li Full Featured Single Cell Li Full Featured Single Cell Li- - --Ion Charger Ion Charger Ion Charger Ion Charger SHDN 330 Ω CHRGb V IN =5V PROG BL4054 BL4054B GND BAT V CC 5V WALL ADAPTER USB POWER 1uF1k 10k 2.5k Li-Ion CELL IBAT USB USB USB USB/ / //Wall Adapter Power Li Wall Adapter Power Li Wall Adapter Power Li Wall Adapter Power Li- - --Ion Charger Ion Charger Ion Charger Ion Charger CHRGb BL4054 BL4054B V CC V + 800k Using a Microprocessor to Determine CHRGb State Using a Microprocessor to Determine CHRGb State Using a Microprocessor to Determine CHRGb State Using a Microprocessor to Determine CHRGb State V DD uPROCESSOR OUT IN PROG BL4054 BL4054B GND BAT V CC 5V WALL ADAPTER 1uF Li-Ion CELL 500mA Basic Li Basic Li Basic Li Basic Li- - --Ion Charger Ion Charger Ion Charger Ion Charger with Reverse Polarity Input Protection with Reverse Polarity Input Protection with Reverse Polarity Input Protection with Reverse Polarity Input Protection PROG BL4054 BL4054B GND BAT V CC V IN =5V 1uF 1.25k Li-Ion CELL 800mA 800 800 800 800mA Li mA Li mA Li mA Li- - --Ion Charger Ion Charger Ion Charger Ion Charger with External Power Dissipation with External Power Dissipation with External Power Dissipation with External Power Dissipation Ω25 .0 uC 500mA 100mA/

m m m m m PPMIC BU www.belling.com.cn BL4054/BL4054B Rev 1.4 Belling Proprietary Information. Unauthorized Photocopy and Duplication Prohibited 5/2009 ©2009 Belling All Rights Reserved 15 m BL4054/BL4054B 800mA Standalone Linear Li-Ion Battery Charger with Thermal Regulation in SOT23-5/TSOT23-5 Package Description m m TSOT12315mSurfacemMountmPackagem

m m m m m PPMIC BU www.belling.com.cn BL4054/BL4054B Rev 1.4 Belling Proprietary Information. Unauthorized Photocopy and Duplication Prohibited 5/2009 ©2009 Belling All Rights Reserved 16 m BL4054/BL4054B 800mA Standalone Linear Li-Ion Battery Charger with Thermal Regulation in SOT23-5/TSOT23-5 m m m Dimensions In Millimeters Dimensions In Inches Symbol Min Max Min Max AB 0.889B 1.295B 0.035B 0.051B A1B 0.000B 0.152B 0.000B 0.006B BB 1.397B 1.803B 0.055B 0.071B bB 0.356B 0.559B 0.014B 0.022B CB 2.591B 2.997B 0.102B 0.118B DB 2.692B 3.099B 0.106B 0.122B eB 0.838B 1.041B 0.033B 0.041B HB 0.080B 0.254B 0.003B 0.010B LB 0.300B 0.610B 0.012B 0.024B SOT12315mSurfacemMountmPackagem m