LP5520 RGB Backlight LED Driver (Rev. B) - TI.com

1 LP55 XXCALIBRATION MEMORYSPI/I2C INTER-FACEBOOSTADCCOLOR AND BRIGHTNESS PWM LOGICLED DRIVERSMCU WITH I2C OR SPI-+COUTCVDDACVDDD100 20 VFBSW100 nF2 PHL1 ROUTLP5520 VDDAVDDDS1_INS2_INPWMRPWMGPWMBVLDONRSTSS /SDASCK/SCLSI/A0 SOIFSELCVDDIO100 nFVDDIOCVLDO1 PFBRCGNDLM 20 VLDOGOUTBOUTD1 ProductFolderSample &BuyTechnicalDocumentsTools &SoftwareSupport &CommunityAn IMPORTANTNOTICEat the end of this datasheetaddressesavailability,warranty, changes,use in safety-criticalapplications,intellectual propertymattersand MAY2007 REVISEDMARCH2016LP5520 RGB BacklightLED Driver11 Features1 TemperatureCompensatedLEDI ntensityandColor IndividualCalibrationCoefficientsfor EachColor ColorAccuracy X and Y 12-BitADCfor Measurementof 2 Sensors AdjustableCurrentOutputsfor Red,Green,andBlue(RGB)

2 LED PWMC ontrolInputsfor EachColor SPI and I2C-CompatibleInterface Stand-AloneModeWithOne-WireControl SequentialModefor One Colorat a Time MagneticHighEfficiencyBoostConverter ProgrammableOutputVoltagefrom5 V to 20 V AdaptiveOutputVoltageControlOption < 2- A TypicalShutdownCurrent2 Applications ColorLCDD isplayBacklighting LEDL ightingApplications3 DescriptionThe LP5520is an RGBbacklightLEDdriverfor the displayand powersavingscomparedwith deviceoffersa smallandsimpledriversolutionwithoutneedf or displaymoduleproductioncanbe donein ,the RGBLED currentsare adjustedfor perfectwhitebalanceindependentofthe brightnesssettingor be programmedto the memoryon the productionline of a magneticboostconverterthatcreatesa supplyvoltageof up to 20 V outputcan be set at 1-V stepsfrom5 V to 20 V.

3 In adaptivemodethe circuitautomaticallyadjuststhe outputvoltageto measuredusinganexternaltemperaturesensor placedcloseto the be used,for example,forambientlight (1)PARTNUMBERPACKAGEBODYSIZE(MAX) LP5520 DSBGA(25) (1) For all availablepackages,see the orderableaddendumatthe end of the MAY2007 : LP5520 SubmitDocumentationFeedbackCopyright 2007 2016,TexasInstrumentsIncorporatedTableof Contents1 Pin Configurationand (ROUT,GOUT,BOUTO utputs).. Applicationand Deviceand Mechanical,Packaging,and RevisionHistoryNOTE:Pagenumbersfor previousrevisionsmay differfrompagenumbersin the (May2013)to RevisionBPage Changed"R, G and B" to "Red,Green,and Blue".

4 1 Deleted"Non-LinearTemperatureCompensatio n" and "AmbientLightCompensation" AddedDeviceInformationandPin Configurationand Functionssections,ESDR atingsandThermalInformationtables,Featur eDescription,DeviceFunctionalModes,Appli cationand Implementation,PowerSupplyRecommendation s,Layout,Deviceand DocumentationSupport, andMechanical,Packaging,and Changed"MAIN,SUB" to " ROUT,GOUT,BOUT"..4 Changed"come" to "are loaded"..12 Changed", and also the variable" to ". The variableparameter"..18 Changed"makespossible" to "allows"..19 Changed"read" to "loaded"..19 Changed"The stand-alonemodemustbe inhibitedin automaticand manualmodesby writingthe controlbit<brc_off>high and by keepingBRCinputlow.

5 " to new text ..19 ChangesfromOriginal(April2013)to RevisionAPage Changedlayoutof NationalDataSheetto TI 2 3 4 5 A B C D E SWFBGND_SWGOUTBOUTROUTS2_INGND_LEDS1_INB RCVDDAVDDDSOSS/SDAGNDAPWMRIFSELPWMGVDDIO VLDONRSTPWMBSI/A0 SCK/SCLGNDT1 2 3 4 5 A B C D E SWFBGND_SWGOUTBOUTROUTS2_INGND_LEDS1_INB RCVDDAVDDDSI/A0 SOSCK/ MAY2007 REVISEDMARCH2016 ProductFolderLinks: LP5520 SubmitDocumentationFeedbackCopyright 2007 2016,TexasInstrumentsIncorporated5 Pin Configurationand FunctionYZRP ackge25-PinDSBGATop ViewYZRP ackge25-PinDSBGAB ottomViewPin FunctionsPINTYPEDESCRIPTIONNUMBERNAME1 AVDDAP owerSupplyvoltagefor analogcircuitry1 BGNDTG roundGround/Test1CS1_INInputADCinput1, inputfor temperaturesensor1 DBOUTO utputBlueLEDoutput1 EGOUTO utputGreenLEDoutput2 AVLDOP owerInternalLDOoutput2 BBRCL ogicInputBrightnesscontrolfor all LEDoutputs2CS2_INInputADCinput2.

6 Inputfor optionalsecondsensor2 DPWMBL ogicInputPWMcontrolfor outputB2 EROUTO utputRed LEDoutput3 AVDDIOP owerSupplyvoltagefor input/outputbuffersand drivers3 BNRSTL ogicInputMasterreset,activelow3 CPWMGL ogicInputPWMcontrolfor outputG3 DGNDAG roundGroundfor analogcircuitry3 EGND_LEDG roundGroundfor LEDcurrents4 ASS/SDAL ogicInput/OutputSlaveselect(SPI),seriald atain/out(I2C)4 BSCK/SCLL ogicInputClock(SPI/I2C)4 CIFSELL ogicInputInterfaceselection(SPIor I2C-compatible,IF_SEL= 1 for SPI)4 DPWMRL ogicInputPWMcontrolfor outputR4 EGND_SWGroundPowerswitchground5 ASOL ogicOutputSerialdataout (SPI)5 BSI/A0 LogicInputSerialinput(SPI),addressselect (I2C)5 CVDDDP owerSupplyvoltagefor digitalcircuitry5 DFBI nputBoostconverterfeedback5 ESWO utputBoostconverterpowerswitch4LP5520 SNVS440B MAY2007.

7 LP5520 SubmitDocumentationFeedbackCopyright 2007 2016,TexasInstrumentsIncorporated(1)Stre ssesbeyondthoselistedunderAbsoluteMaximu mRatingsmay causepermanentdamageto the stressratingsonly,whichdo not implyfunctionaloperationof the deviceat theseor any otherconditionsbeyondthoseindicatedunder RecommendedOperatingConditions. Exposureto absolute-maximum-ratedconditionsfor extendedperiodsmay affectdevicereliability.(2)All voltagesare with respectto the potentialat the GNDpins.(3)If Military/Aerospacespecifieddevicesare required,contactthe TI SalesOffice/Distributorsfor availabilityand specifications.

8 (4)Internalthermalshutdowncircuitryprote ctsthe TJ= 160 C (typical)anddisengagesat TJ= 140 C (typical).6 (unlessotherwisenoted)(1)(2)(3)MINMAXUNI TV (SW,FB, ROUT,GOUT,BOUT) , VDDD, VDDIO, VLDO logicpins V to V with 6 VmaximumVContinuouspowerdissipation(4)In ternallylimitedJunctiontemperature,TJ-MA X125 CStoragetemperature,Tstg 65150 C(1)JEDEC documentJEP155statesthat 500-VHBM allowssafe manufacturingwith a standardESDcontrolprocess.(2)JEDEC documentJEP157statesthat 250-VCDM allowssafe manufacturingwith a (ESD)ElectrostaticdischargeHuman-bodymod el(HBM),per ANSI/ESDA/JEDECJS-001(1) 2000 VCharged-devicemodel(CDM),per JEDEC specificationJESD22-C101(2) 200(1)All voltagesare with respectto the potentialat the GNDpins.

9 (2)In applicationswherehigh powerdissipationand/orpoorpackagethermal resistanceis present,the maximumambienttemperaturemayhaveto be (TA-MAX) is dependenton the maximumoperatingjunctiontemperature(TJ-M AX-OP=125 C), the maximumpowerdissipationof the devicein the application(PD-MAX), and the junction-toambientthermalresistanceof thepart/packagein the application(R JA), as givenby the followingequation:TA-MAX= TJ-MAX-OP (R JA PD-MAX). (unlessotherwisenoted)(1)MINMAXUNITV (SW,FB, ROUT,GOUT,BOUT)021 VVDDA, current(ROUT,GOUT,BOUT)per driver060mAJunctiontemperature,TJ 30125 CAmbienttemperature,TA(2) 3085 C(1)For moreinformationabouttraditionaland new thermalmetrics,see theSemiconductorand IC PackageThermalMetricsapplicationreport, (1) LP5520 UNITYZR(DSBGA)25 PINSR C/WR JC(top)Junction-to-case(top) C/WR C/W C/W MAY2007 REVISEDMARCH2016 ProductFolderLinks: LP5520 SubmitDocumentationFeedbackCopyright 2007 2016,TexasInstrumentsIncorporated(1)All voltagesare with respectto the potentialat the GNDpins.

10 (2)Minimumand maximumlimitsare specifiedby design,test or mostlikelynorm.(3)Low-ESRS urface-MountCeramicCapacitors(MLCCs)used in for TJ= 25 C, minimumand maximumlimitsapplyoverthe operatingambienttemperaturerange( 30 C < TJ< +85 C), and specificationsapplyto the LP5520 FunctionalBlockDiagramwith:CVDDA/D=100 nF, COUT= 2 F, 25 V, CIN= 10 F, V, L1 = H.(1)(2)(3)PARAMETERTESTCONDITIONSMINTYP MAXUNITIVDDS tandbysupplycurrent(VDDA+ VDDD)NSTBY= L, VDDIO ANSTBY= L , VDDIO= 0 V1No-boostsupplycurrent(VDDA+ VDDD)NSTBY= H,EN_BOOST= (VDDA+ VDDD)NSTBY= H, EN_BOOST= HAUTOLOAD= L1 AVLDOI nternalLDOoutputvoltageVIN V, TJ= 25 externalload1mA(1)Matchingis the maximumdifferencefromthe averagewhenall outputsare set to samecurrent.