Texas Instruments LP3910 Bedienungsanleitung

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USB Controller

Battery

Apps Processor

Audio

Touch

HDD

Memory

LP3910

Buck-Boost

LDO2

LDO1

Buck2

Buck1

Linear Charger

ACDC Wall Adapter

Battery Monitor

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LP3910

SNVS481M–NOVEMBER2006–REVISEDDECEMBER2015

LP3910PowerManagementICforHard-Drive-BasedPortableMediaPlayers

1Features2Applications

1

•TwoLow-DropoutRegulatorsWithProgrammable

•HardDrive-BasedMediaPlayers

OutputVoltages:

•PortableGamingPlayers

–LDO1forGeneralPurposeApplications

•PortableNavigationDevices

–LDO2forLow-NoiseAnalogApplications

3Description

•GreenandRedLED-ChargerStatusDrivers

TheLP3910isaprogrammablesystempower

•4-Channel8-BitDualSlope

managementunitoptimizedforHDD-basedportable

Analog-to-Digital(ADC)Converter

mediaplayers.Thedeviceincorporatestwolow-

•2High-EfficiencyDVSBuckConverters

dropoutLDOvoltageregulators,twointegratedbuck

DC-DCconverterswithdynamicvoltagescaling

•WideLoadRangeBuck-BoostDC-DCConverter

(DVS),onewideload-rangebuck-boostDC-DC

•400-kHzI

2

C-CompatibleInterface

converterwithprogrammableoutputvoltage,a4-

•LinearConstant-CurrentandConstant-Voltage

channel,8-bitADC,andadual-sourcelithium-ionor

ChargerforSingle-CellLithium-IonBatteries

lithium-polymerbatterycharger.

•USBandAdapterCharging

TheLP3910alsoincorporatessomeadvanced

•SystemPowerSupplyManagement

batterymanagementfunctionssuchasbattery

temperaturemeasurement,reversecurrentblocking

•VoltageandThermalSupervisoryCircuits

forUSB,LED-chargerstatusindication,thermally

•ContinuousBatteryVoltageMonitoring

regulatedinternalpowerFETs,battery-voltage

•InterruptRequestOutputWith8Sources

monitoring,overcurrentprotection,anda10-hour

•50-mΩBatteryPathResistance

safetytimer.Thedeviceisprogrammablethrougha

400-kHzI2C-compatibleinterface.

•100-mAto1000-mAFull-RateChargeCurrent

UsingWallAdapter

TheLP3910isavailableinathermally-enhanced

6-mm×6-mm×0.8-mm48-pinWQFNpackage.

•Selectable0.05Cand0.1CEnd-of-Charge(EOC)

Current

DeviceInformation

(1)

•USBCurrentLimitsof100,500,and800mA

PARTNUMBERPACKAGEBODYSIZE(NOM)

•USBPre-QualificationCurrentof50mA

LP3910WQFN(48)6.00mm×6.00mm

•Selectable4.1-V,4.2-Vor4.38-VBattery-

(1)Forallavailablepackages,seetheorderableaddendumat

TerminationVoltages

theendofthedatasheet.

•0.35%Battery-TerminationAccuracy

•±1LSBINL/DNLon8-BitADC

SimplifiedBlockDiagram

1

AnIMPORTANTNOTICEattheendofthisdatasheetaddressesavailability,warranty,changes,useinsafety-criticalapplications,

intellectualpropertymattersandotherimportantdisclaimers.PRODUCTIONDATA.

Produktspezifikationen