TPS61196 6-String 400-mA WLED Driver w/ …

1 L168mHD1 IFB1 ISNSVINVDDISETAGNDTPS61196 GDRVFSWC110mFPWM2 VIN = &BuyTechnicalDocumentsTools &SoftwareSupport &CommunityTPS61196 SLVSBG1D OCTOBER2012 REVISEDMAY2015 TPS611966-String400-mAWLEDD riverwithIndependentPWM Dimmingfor Each StringTheTPS61196supportsdirectPWMbright ness1 independentPWM1 8-V to PWMdimming,the LED Up to 120-VOutputVoltagecurrentis turnedon or turnedoff at the frequencyanddutycyclewhichare determinedby the external 100-KHzto PWMfrequencyrangesfrom90 HzFrequencyto 22 kHz. AdaptiveBoostOutputfor LEDV oltagesThe deviceintegratesovercurrentprotection,ou tput Six CurrentSinks,200-mAContinuousOutput,shor t-circuitprotection,ISET short-to-ground400-mAPulseOutputfor EachStringprotection,diodeopenandshortpr otection,LED ,andovertemperature HighPrecisionPWMD immingResolutionup addition,the TPS61196candetectthe IFB pin shortto groundto protectthe LED5000 devicealsoprovidesprogrammableinput ProgrammableOvervoltageThresholdat Outputundervoltagelockoutthresholdandout putand EachCurrentSinkovervoltageprotectionthre shold.

2 ProgrammableUndervoltageThresholdat InputThe TPS61196has a built-inlinearregulatorwhichwith AdjustableHysteresisstepsdownthe inputvoltageto the VDDvoltagefor AdjustableSoft StartTimeIndependentofpoweringthe soft-startcircuitisDimmingDutyCycleimple mentedinternallyto workwithan external Built-inLEDO penand LEDS hortProtectioncapacitorto adjustthe soft start-uptimeto minimizethe in-rushcurrentduringboostconverterstart- up. Built-inSchottkyDiodeOpen/ShortProtectio nThe deviceis availablein a 28-pinHTSSOP package Built-inISETS hortProtectionwith PowerPAD . Built-inIFB ShortProtectionDeviceInformation(1) ThermalShutdownPARTNUMBERPACKAGEBODYSIZE (NOM)2 ApplicationsTPS61196 HTSSOP(28) x LCDTV Backlight(1) For all availablepackages,see the orderableaddendumatthe end of the datasheet.

3 ScanModeLCDTV BacklightSimplifiedSchematic3 DescriptionThe TPS61196providesa highlyintegratedsolutionfor LCDTV backlightwithan independentPWMdimmingfunctionfor acurrentmodeboostcontrollerdrivingup to six WLED stringswith multipleLEDsin independentcurrentregulatorprovidinga LEDcurrentadjustablefrom50 mA to 400mA within minimalvoltageat thecurrentsink is programmablein the rangeof V to1 V to fit with inputvoltagerangefor the deviceis from8 V to 30 boostcontroller's outputvoltageautomaticallyto provideonlythe voltagerequiredby the LEDstringwiththe largestforwardvoltagedropplusthe minimumrequiredvoltageatthatstring's IFBpin, switchingfrequencyis programmedbyan externalresistorfrom100 kHz to 800 IMPORTANTNOTICEat the end of this datasheetaddressesavailability,warranty, changes,use in safety-criticalapplications,intellectual propertymattersand OCTOBER2012 Applicationand Pin Configurationand Deviceand Mechanical,Packaging,and RevisionHistoryNOTE.

4 Pagenumbersfor previousrevisionsmay differfrompagenumbersin the (March2013)to RevisionDPage AddedDeviceInformationandESDR atingtables,FeatureDescription,DeviceFun ctionalModes,ApplicationandImplementatio n,PowerSupplyRecommendations,Layout,Devi ceand DocumentationSupport, andMechanical,Packaging,and OrderableInformationsections;movedsomecu rvestoApplicationCurvessection; Changedlocationof (January2013)to RevisionCPage ChangedVLmax V to V ..5 ChangedVIN= 7 V to VIN= 8 V in TestConditionsfor VISNS(OC)..6 ChangesfromRevisionA (November2012)to RevisionBPage ChangedRPDmax M to M ..5 ChangedVISETmin to.

5 5 DeletedIFLT_Lmax ChangedR7 to R9 in (October2012)to RevisionAPage ChangedFigure20 ..142 SubmitDocumentationFeedbackCopyright 2012 2015, OCTOBER2012 REVISEDMAY20155 Pin Configurationand Functions28-PinHTSSOPPWPP ackageTop ViewPin FunctionsPINTYPEDESCRIPTIONNUMBERNAMELow a resistordividerfromVINto this pin to set the disablepin. EN high = enable,EN low = ,4,5,6,7,8 PWM1to frequencyof PWMsignalis in the rangeof 90 Hz to 22 Use a resistorto GNDto set resistorto the pin programsthe IFB pin currentlevelfor full brightness(thatis,10 ISETO100%dimming).11 IFBVOM inimumfeedbackvoltagesettingfor ,13,14,15,1 IFB1to IFB6 IRegulatedcurrentsink inputpins6, resistordividerfromoutputto this pin to19 OVPI programthe the RC networkto makeloop the a capacitorat this pin to adjustthe21 REFO soft chipsoperatein parallel,connectthe master'sREFpin to theslave' 1- F ceramiccapacitor25 VDDOto this Use a resistorto set the frequencybetween100 kHz to V or V disablesthe internalclockandmakesthe deviceas impedancewhenfault 2012 2015,TexasInstrumentsIncorporatedSubmitD ocumentationFeedback3 ProductFolderLinks.

6 TPS61196 TPS61196 SLVSBG1D OCTOBER2012 (unlessotherwisenoted)(1)MINMAXUNITVIN pin to IFB6pins ,ISET,ISNS,IFBV pins (2)VEN, PWM1to PWM6pins 29 All otherpins 40150 CStoragetemperature,Tstg 65150 C(1)StressesbeyondthoselistedunderAbsolu teMaximumRatingsmay causepermanentdamageto the stressratingsonly,whichdo not implyfunctionaloperationof the deviceat theseor any otherconditionsbeyondthoseindicatedunder RecommendedOperatingConditions. Exposureto absolute-maximum-ratedconditionsfor extendedperiodsmay affectdevicereliability.(2)All voltagevaluesare with respectto (HBM),per ANSI/ESDA/JEDECJS-001(1) 2000 ElectrostaticV(ESD)Charged-devicemodel(C DM),per JEDEC specificationJESD22-C101(2) 1000 VdischargeMachinemodel200 (max)(1)JEDEC documentJEP155statesthat 500-VHBM allowssafe manufacturingwith a standardESDcontrolprocess.

7 (2)JEDEC documentJEP157statesthat 250-VCDM allowssafe manufacturingwith a (unlessotherwisenoted)(1)MINNOMMAXUNITVI NI nputvoltage830 VVOUTO utputvoltageVIN120VL1 Inductor10100 HCINI nputcapacitor10 FCOUTO utputcapacitor22220 4085 CTJO peratingjunctiontemperature 40125 C(1)Customersneedto verifythe componentvaluein theirapplicationif the valuesare differentfromthe 2012 2015, OCTOBER2012 (1)PWPUNIT28 PINSR JC(top)Junction-to-case(top) C/W JC(bot)Junction-to-case(bottom) (1)For moreinformationabouttraditionaland new thermalmetrics,see theIC PackageThermalMetricsapplicationreport, 24 V, minimumand maximumlimitsare at TA= 40 C to +85 C, typicalvaluesare at TA= 25 C, C1 = 10 F, C2 = F, C3 = 1 F, EC1= EC2= 100 F (unlessotherwisenoted).

8 ,no switching,VIN=Iq_VIN2mAVIN30 VVIN= 12 V,25 ISDS hutdowncurrent AVIN= 30 V50 Regulationvoltagefor internalVDD0 mA < IDD< 15 and PWMxVHLogichigh inputon EN,PWMxVIN= 8 V to 30 inputon EN, PWMxVIN= 8 V to 30 EN, PWMxUVLOVUVLOTHT hresholdvoltageat VUVLOTH 50 mV current AVUVLO= VUVLOTH+ 50 mV , VREF< 2 V200 ISSSoft startchargingcurrent APWMON, VREF> 2 V10 CURRENTREGULATIONVISETISETpin AthresholdKISETC urrentmultipleIIFB/IISETIISET= A, VIFB= V393239924052 IIFB(AVG)CurrentaccuracyIISET= A, VIFB= ;(IFB(MAX)-KIFB(M)IISET= A, VIFB= (MIN))/2 IFB(AVG)IFB pin leakagecurrentatIIFB_LEAKIFB voltage< 40 V1 AdimmingoffIIFB_maxCurrentsink max outputcurrentVIFBV= 350 mV130mACopyright 2012 2015,TexasInstrumentsIncorporatedSubmitD ocumentationFeedback5 ProductFolderLinks: TPS61196 TPS61196 SLVSBG1D OCTOBER2012 (continued)VIN= 24 V, minimumand maximumlimitsare at TA= 40 C to +85 C, typicalvaluesare at TA= 25 C, C1 = 10 F, C2 = F, C3 = 1 F, EC1= EC2= 100 F (unlessotherwisenoted).

9 PARAMETERTESTCONDITIONSMINTYPMAXUNITIFB REGULATIONVOLTAGEM easuredon VIFB(min),otherIFBvoltagesare V aboveVIFB(min).VIFBR egulationvoltageat IFB508mVIIFB= 130 mA, VIFBV= VIFB RegulationvoltagesettingIIFBVVIFBV= REFpin 2525nAOSCILLATORVFSWFSWpin sink currentVOVP= VREF+ 200 mV, VCOMP= 1 V20 AISOURCEC omppin sourcecurrentVOVP= VREF 200 mV, VCOMP= 1 V20 AGmEAErroramplifiertransconductance90120 150 SREAE rroramplifieroutputresistance20M GATEDRIVERG atedriverimpedancewhenRGDRV(SRC)VDD= 6 V, IGDRV= 20 mA23 sourcingGatedriverimpedancewhenRGDRV(SNK )VDD= 6 V, IGDRV= 20 sinkingIGDRV(SRC)Gatedriversourcecurrent VGDRV= 5 V200mAIGDRV(SNK)Gatedriversink currentVGDRV= 1 V400mAVISNS(OC)

10 OvercurrentdetectionthresholdVIN= 8 V to 30 V, TJ= 25 C to 125 C376400424mVOVERVOLTAGEPROTECTION(OVP) 1000100nAVIFB_OVPIFB xovervoltagethresholdPWMON38 VLEDSHORTDETECTIONLED shortdetectionsourcingIFBPVFBP= 1 highIFLT_HVFLT= 24 V1nAimpedanceIFLT_LSinkcurrentat low outputVFLT= 1 V12mATHERMALSHUTDOWNT shutdownThermalshutdownthreshold150 CThermalshutdownthresholdThys15 Chysteresis6 SubmitDocumentationFeedbackCopyright 2012 2015, OCTOBER2012 (unlessotherwisenoted)PARAMETERTESTCONDI TIONSMINTYPMAXUNIT SWSwitchingfrequencyRFSW= 200 k 187200213kHzDmaxMaximumduty cycle SW= 200 kHz90%94%98%ton(min)Minimumpulsewidth200 nsfEAErroramplifiercrossoverfrequency100 0kHzCopyright 2012 2015,TexasInstrumentsIncorporatedSubmitD ocumentationFeedback7 ProductFolderLinks.