Texas Instruments LP8501 Bedienungsanleitung

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LP8501

D1

D2

D4

D7

VOUT

C

OUT

1 PF

C

2

0.47 PF

VDD1_6

VDD7_9

GND

TRIG

INT

C

IN

1 PF

V

IN

= 2.7V TO 5.5V

VDD

C

1

0.47 PF

C1+

C1-

C2+

C2-

GPO

B

G

R

D3

D8

B

G

R

B

G

R

D6

D5

D9

MCU

SCL

SDA

EN

CLK

V

OUT

LP8501

www.ti.com

SNVS548D–SEPTEMBER2008–REVISEDAUGUST2013

LP8501Multi-Purpose9-OutputLEDDriver

CheckforSamples:LP8501

1

FEATURES

DESCRIPTION

TheLP8501isanLEDdriverwith9outputs,

2

•ThreeIndependentProgramExecution

designedtoproduceversatilelightingeffectsfor

EnginesforUser-definedProgramswithLarge

mobiledevices.Thedeviceisequippedwithan

SRAMMemoryforStoringLightingPrograms

internalprogrammemory,whichallowsoperation

•9ProgrammableSource(HighSide)Driver

withoutprocessorcontrol.Internalprogrammemory

Outputswith25.5mAFull-ScaleCurrent,8-bit

isusedbythreeindependentprogramexecution

CurrentSettingResolutionand12-BitPWM

enginestoproduceuser-definedlightingeffectsfor

theoutputs.

ControlResolution

•FlexibleGroupingPossibilityforAll9Outputs

Ahigh-efficiencychargepumpenablesLEDdriving

IncludingGPOintoThreeGroupswithGroup

overfullLi-Ionbatteryvoltagerange.Theexcellent

PWMandFade-In/Fade-OutControls

efficiencyoverawideoperatingrangeisachievedby

autonomouslyselectingthebestchargepumpgain

•Built-inLEDTest

basedonLEDforwardvoltagerequirements.The

•AdaptiveChargePumpwith1xand1.5xGain

LP8501isabletoautomaticallyenterpower-save

Providesupto95%LEDDriveEfficiency,with

modewhenLEDoutputsarenotactive,thuslowering

SoftStartandOvercurrent/ShortCircuit

idlecurrentconsumptiondownto10µA(typ.)

Protection

•AutomaticPowerSaveMode;I

VDD

=10µA

(typ.)

•TwoWire,I

2

C-Compatible,ControlInterface

•SmallApplicationCircuit

•Pin-configuredLEDPoweringforLEDs1to6

andforLEDs7to9

•SolutionArea<18mm

2

APPLICATIONS

•FunLightsandIndicatorLights

•LEDBacklightingandColorKeypadLighting

•ProgrammableCurrentSource

•HapticFeedbackDriverandGPIOExpander

1

Pleasebeawarethatanimportantnoticeconcerningavailability,standardwarranty,anduseincriticalapplicationsof

TexasInstrumentssemiconductorproductsanddisclaimerstheretoappearsattheendofthisdatasheet.

2Alltrademarksarethepropertyoftheirrespectiveowners.

PRODUCTIONDATAinformationiscurrentasofpublicationdate.

Copyright©2008–2013,TexasInstrumentsIncorporated

ProductsconformtospecificationsperthetermsoftheTexas

Instrumentsstandardwarranty.Productionprocessingdoesnot

necessarilyincludetestingofallparameters.

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