Texas Instruments LP55281 Handleiding

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MCU

R3

G3

B3

R4

G4

B4

IRGB

IRT

ASE2

AUDIO

INPUTS

LP55281

SW

BATTERY

FB

V

DDA

V

REF

D1

V

DD2

V

DD1

GNDs

SCK/SCL

SI/A0

SS/SDA

SO

IF_SEL

V

DDIO

RGB3

RGB4

R

RT

R

RGB

C

OUT

10 PF

I

MAX

= 300...400 mA

V

OUT

= 4...5.3V

-+

C

VDD

100 nF

L

boost

C

IN

10 PF

C

VDDA

1 éF

C

REF

100 nF

C

VDDIO

100 nF

ALED

RGB1

RGB2

R1

G1

B1

R2

G2

B2

ASE1

4.7 PH

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AnIMPORTANTNOTICEattheendofthisdatasheetaddressesavailability,warranty,changes,useinsafety-criticalapplications,

intellectualpropertymattersandotherimportantdisclaimers.PRODUCTIONDATA.

LP55281

SNVS458D–JUNE2007–REVISEDOCTOBER2016

LP5528112-ChannelRGB/White-LEDDriveWithSPI,I

2

CInterface

1

1Features

1

•AudioSynchronizationforaSingleFun-LightLED

•FourPWMControlledRGBLEDDrivers

•High-EfficiencyBoostDC-DCConverter

•SPIorI

2

C-CompatibleInterface

•TwoAddressesinI

2

C-CompatibleInterface

•LEDConnectivityTestThroughtheSerial

Interface

2Applications

•CellularPhones

•PDAs,MP3Players

3Description

TheLP55281deviceisaquadrupleRGBLEDdriver

forhandhelddevices.Itcandrive4RGBLEDsets

andasinglefun-lightLED.TheboostDC-DC

converterdriveshighcurrentloadswithhigh

efficiency.TheRGBdrivercandriveindividualcolor

LEDsorRGBLEDspoweredfromboostoutputor

externalsupply.Built-inaudiosynchronizationfeature

allowsusertosynchronizethefun-lightLEDtoaudio

inputs.TheflexibleSPIorI

2

Cinterfaceallowseasy

controlofLP55281.AsmallYZR0036orYPG0036

package,togetherwithminimumnumberofexternal

components,isabestfitforhandhelddevices.The

LP55281alsohasanLEDtestfeature,whichcanbe

used,forexample,inproductionforcheckingtheLED

connections.

DeviceInformation

(1)

PARTNUMBERPACKAGEBODYSIZE(NOM)

LP55281DSBGA(36)2.982mm×2.982mm

(1)Forallavailablepackages,seetheorderableaddendumat

theendofthedatasheet.

TypicalApplication

Product specificaties