Texas Instruments LP5524 Handleiding

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LP5524

ENA

VIN

ISET

D2B

V

IN

GND

ENBD1B

D2A

D1A

R

ISET

(optional)

I

DX

= 25 mA max

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AnIMPORTANTNOTICEattheendofthisdatasheetaddressesavailability,warranty,changes,useinsafety-criticalapplications,

intellectualpropertymattersandotherimportantdisclaimers.PRODUCTIONDATA.

LP5524

SNVS500C–JULY2007–REVISEDNOVEMBER2016

LP5524Four-ChannelLEDDriverWithDual-PWMBrightnessControl

1

1Features

1

•WideInputVoltageRange:2.7Vto5.5V

•High-SideLEDDriver

•DrivesFourLEDsWithupto25mAperLED

•0.4%TypicalCurrentMatching

•PWMBrightnessControl

•OvercurrentProtection

•FastTransientResponse

•OptionalExternalISETResistor

•Ultra-SmallSolutionSize:

–NoExternalComponents

–9-PinDSBGAPackagewith0.4-mmpitch:

–1.24mm×1.24mm×0.6mm(L×W×H,

maximum)

2Applications

•Sub-DisplayBacklight

•KeypadLEDBacklight

•IndicatorLED

3Description

TheLP5524deviceisahighlyintegrateddual-zone

LEDdriverthatcandriveuptofourLEDsinparallel

withatotaloutputcurrentof100mA.Regulatedhigh-

sideinternalcurrentsourcesdeliverexcellentcurrent

andbrightnessmatchinginallLEDs.

TheLP5524providesovercurrentprotectionand

pulse-widthmodulation(PWM)controloffour

indicatorLEDswithouttheneedforexternal

components.

LEDdrivercurrentsourcesaresplitintotwo

independentlycontrolledbanksfordrivingsecondary

displays,keypadandindicatorLEDs.Brightness

controlisachievedbyapplyingPWMsignalstoeach

enablepin.DefaultLEDcurrentisfactory-

programmableandanoptionalexternalresistorcan

beusedtosetLEDcurrenttouserprogrammable

values.

TheLP5524isavailableinatiny,9-pin,thinDSBGA

package.

DeviceInformation

(1)

PARTNUMBERPACKAGEBODYSIZE(NOM)

LP5524DSBGA(9)1.21mm×1.21mm

(1)Forallavailablepackages,seetheorderableaddendumat

theendofthedatasheet.

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