Texas Instruments BQ24750A Handleiding

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1

FEATURES

APPLICATIONS

DESCRIPTION

ACOP

bq24750A

28LDQFN

TOPVIEW

DPMDET

SRN

BAT

CELLS

SRP

SRSET

IADAPT

ACDRV

ACSET

CHGEN

ACN

ACP

ACDET

PVCC

BTST

HIDRV

REGN

PH

LODRV

PGND

TS

AGND

VREF

V

ADJ

VDAC

ACGOOD

BATDRV

1

2

3

4

5

6

7

21

20

19

18

17

16

15

891011121314

28272625242322

bq24750A

www.ti.com

..........................................................................................................................................................SLUS834A–JULY2008–REVISEDMARCH2009

Host-ControlledMulti-ChemistryBatteryChargerwithLowI

q

andIntegratedSystem

PowerSelector

•28-pin,5x5-mmQFNpackage

•NMOS-NMOSSynchronousBuckConverter•EnergyStarLowI

q

with300kHzFrequencyand>95%Efficiency

–<10µAOff-StateBatteryDischargeCurrent

•30-nsMinimumDriverDead-timeand99.5%

–<1.5mAOff-StateInputQiescentCurrent

MaximumEffectiveDutyCycle

•High-AccuracyVoltageandCurrentRegulation

•NotebookandUltra-MobileComputers

–±0.5%ChargeVoltageAccuracy

•PortableData-CaptureTerminals

–±3%ChargeCurrentAccuracy

•PortablePrinters

–±3%AdapterCurrentAccuracy

•MedicalDiagnosticsEquipment

–±2%InputCurrentSenseAmpAccuracy

•BatteryBayChargers

•Integration

•BatteryBack-upSystems

–AutomaticSystemPowerSelectionFrom

AC/DCAdapterorBattery

–InternalLoopCompensation

Thebq24750Aisahigh-efficiency,synchronous

–InternalSoftStart

batterychargerwithintegratedcompensationand

•Safety

systempowerselectorlogic,offeringlowcomponent

countforspace-constrainedmulti-chemistrybattery

–InputOvervoltageProtection(OVP)

chargingapplications.Ratiometricchargecurrentand

–DynamicPowerManagement(DPM)with

voltageprogrammingallowshighregulation

StatusIndicator

accuracies,andcanbeeitherhardwiredwithresistors

–ProgrammableInrushAdapterPower

orprogrammedbythesystempower-management

(ACOP)andOvercurrent(ACOC)Limits

microcontrollerusingaDACorGPIOs.

–Reverse-ConductionProtectionInputFET

–BatteryThermistorSenseInput(TS)for

ChargeQualification

•SupportsTwo,Three,orFourLi+Cells

•5–24VAC/DC-AdapterOperatingRange

•AnalogInputswithRatiometricProgramming

viaResistorsorDAC/GPIOHostControl

–ChargeVoltage(4–4.512V/cell)

–ChargeCurrent(upto10A,with10mΩ

senseresistor)

–AdapterCurrentLimit(DPM)

•StatusandMonitoringOutputs

–AC/DCAdapterPresentwithProgrammable

VoltageThreshold

–DPMLoopActive

–CurrentDrawnfromInputSource

•SupportsAnyBatteryChemistry:Li+,NiCd,

NiMH,LeadAcid,etc.

•ChargeEnable

1

Pleasebeawarethatanimportantnoticeconcerningavailability,standardwarranty,anduseincriticalapplicationsofTexas

Instrumentssemiconductorproductsanddisclaimerstheretoappearsattheendofthisdatasheet.

PRODUCTIONDATAinformationiscurrentasofpublicationdate.

Copyright©2008–2009,TexasInstrumentsIncorporated

ProductsconformtospecificationsperthetermsoftheTexas

Instrumentsstandardwarranty.Productionprocessingdoesnot

necessarilyincludetestingofallparameters.

Product specificaties