TPS92692 LED Controller with Spread Spectrum …

1 VCTRLTPS92692-Q1 VINVREFFLTSSDMRTCOMPIMONIADJDIM/PWMVCCGA TEISGNDSLOPEOVCSPCSNPDRVRAMP123456789102 0191817161514131211 VINLED +LED LCINCVREFCSSCDMRTCCOMPCIMONRADJ2 RADJ1 RDIM2 RDIM1 RSLPRISCVCCROV1 ROV2 COUTCRAMPRCSQMQDIMDDDIMPADP roductFolderOrderNowTechnicalDocumentsTo ols &SoftwareSupport &CommunityAn IMPORTANTNOTICEat the end of this datasheetaddressesavailability,warranty, changes,use in safety-criticalapplications,intellectual propertymattersand , TPS92692 -Q1 SLVSDD9 MARCH2017 TPS92692 , TPS92692 -Q1 High AccuracyLED ControllerWithSpreadSpectrumFrequencyMod ulation11 Features1 V to 65 V Betterthan 4% LEDC urrentAccuracyover 40 C to 150 C JunctionTemperatureRange SpreadSpectrumFrequencyModulationforImpr ovedEMI ComprehensiveFaultProtectionCircuitrywit hCurrentMonitoroutputand OpenDrainFaultFlagIndicator InternalAnalogVoltageto PWMDutyCycleGeneratorfor stand-aloneDimmingOperation Compatiblewith DirectPWMI nputwith over1000:1 DimmingRange AnalogLEDC urrentAdjustInput(IADJ)with over15:1 ContrastRatio IntegratedP-ChannelDriverto enableSeriesFETD immingand LEDP rotection TPS92692 -Q1:AutomotiveQ100 Grade1 Qualified2 Applications TPS92692 -Q1.

2 AutomotiveExteriorLightingApplications DriverMonitoringSystems(DMS) LEDG eneralLightingApplications Exit Signsand EmergencyLighting3 DescriptionThe TPS92692and TPS92692 -Q1are highaccuracypeakcurrentmodebasedcontroll ersdesignedtosupportstep- rail-to-railcurrentamplifiertomeasureLED currentand spreadspectrumfrequencymodulationtechniq uefor improvedEMI :1rangeis obtainedby varyingthe voltageacrossthe highimpedanceanalogadjust(IADJ) LEDcurrentis achievedby directlymodulatingtheDIM/PWMinputpin with the desireddutycycleor byenablingthe correspondingdutycyclebycomparingit to the optionalPDRV gatedriveroutputcan be usedtodrivean TPS92692 -Q1devicessupportcontinuousLEDst atuscheckthroughthe currentmonitor(IMON) devicesalsoincludeanopendrainfaultindica toroutputto indicateLEDovercurrent, (1)PARTNUMBERPACKAGEBODYSIZE(NOM)TPS9269 2-Q1 HTSSOP(20) (1) For all availablepackages,see the orderableaddendumatthe end of the TypicalBoostLEDD river2 TPS92692 , TPS92692 -Q1 SLVSDD9 : TPS92692 TPS92692 -Q1 SubmitDocumentationFeedbackCopyright 2017,TexasInstrumentsIncorporatedTableof Contents1 Pin Configurationand Applicationand Deviceand Mechanical,Packaging,and RevisionHistoryDATEREVISIONNOTESM arch2017*Initialrelease.

3 123456782019181716151413 Thermal PadVINVREFFLTSSDMRTCOMPIMONVCCGATEISGNDS LOPEOVCSPCSN9 IADJ10 DIM/PWM1211 PDRVRAMP3 TPS92692 , MARCH2017 ProductFolderLinks: TPS92692 TPS92692 -Q1 SubmitDocumentationFeedbackCopyright 2017,TexasInstrumentsIncorporated6 Pin Configurationand FunctionsPWPP ackage20-PinHTSSOP withPowerPAD Top ViewPin achievedesiredclosed-loop ( ). Connectdirectlyto the negativenodeof LEDcurrentsenseresistor, (+). Connectdirectlyto the positivenodeof LEDcurrentsenseresistor, PWMdimmingcommandor externalanalogdimmingcommandbetween1 V and 3 V is comparedto the internalPWMgeneratortrianglewaveformto set LEDcurrentduty cyclebetween0% and 100%.WithPWMgeneratordisabled,adirectPWM dimmingcommandcan be appliedto controlthe LEDcurrentduty cycleand analogor PWMcommandis usedto generatean internalPWMsignalthat controlsthe GATEand internalPWMsignalto logiclevellow, turnsoff switching,idlestheoscillator,disconnects the COMPpin, and sets PDRVto VCSP.

4 Connectto VREF whennot ,fm, programmingpin. Connecta capacitortoGNDto set the GNDto disablespreadspectrummodulationof VREF with a resistorto createactivelow fault auto-restarttimercan enabledby directlyconnectingthepin to SS gateof Analogand Powergroundconnectionpin. Connectto circuitgroundto pin to VCCwith a 100-k seriesresistorto set theinternalreferencevoltageto and the currentsensethreshold,V(CSP-CSN)to Thepin can be modulatedby an externalvoltagesourcefrom140 mV to to The LEDcurrentsensedby CSP/CSNinputis reportedas VIMON= 14 ILED RCS. Bypasswith a 1-nFceramiccapacitorconnectedto the switchsenseresistor,RISto set the switchcurrentlimitthresholdbasedon the internal250 mV resistordividerfromoutputvoltageto GNDto set outputovervoltageand gateof externalP-channelMOSFETto implementseriesFET PWMdimmingand fault , TPS92692 -Q1 SLVSDD9 : TPS92692 TPS92692 -Q1 SubmitDocumentationFeedbackCopyright 2017,TexasInstrumentsIncorporatedPin Functions(continued) capacitorto GNDto set the trianglewavefrequencyfor 249-k resistorto GNDto disablethe PWMgeneratorand to set a fixedreferencefor not allowthis pinto Connecta resistorto GNDto set the internaloscillatorcan be synchronizedby couplingan externalclockpulsethrougha seriescapacitorwith a valueof 100 resistorto GNDto set the desiredslopecompensationrampbasedon inductorvalue,inputand Connecta capacitorto GNDto extendthe disabledby shortingthis pin to VCC( V) bias supplypin.

5 Locallydecoupleto GNDusinga ceramiccapacitor(witha F and F). Locatecloseto the Inputsupplyfor the a low-passfilter usinga series10- resistorand 10- nF capacitorconnectedto capacitorcloseto the VREF(5 V) bias supplypin. Locallydecoupleto GNDusinga ceramiccapacitor(witha F and F) locatedcloseto the The GNDpin mustbe connectedto the exposedthermalpad for PowerPADmustbe connectedto PCBgroundplaneusingmultiplevias for goodthermalperformance.(1)Stressesbeyond thoselistedunderAbsoluteMaximumRatingsma y causepermanentdamageto the stressratingsonly,whichdo not implyfunctionaloperationof the deviceat theseor any otherconditionsbeyondthoseindicatedunder RecommendedOperatingConditions. Exposureto absolute-maximum-ratedconditionsfor extendedperiodsmay affectdevicereliability.(2)All voltagesare with respectto GNDunlessotherwisenoted(3)Continuoussust ainingvoltage(4)All outputpins are not specifiedto havean (unlessotherwisenoted)(1)(2)MINMAXUNITI nputvoltageVIN,CSP,CSN , RT, FLT , SS, RAMP,DM, SLOPE,VREF,IADJ CSN(3) (4)VCC,GATE 100 AGATE(pulsed< 20 ns) 500mAPDRV(pulsed< 10 s) 50mASinkcurrentGATE(pulsed< 20 ns) 500mAPDRV(pulsed< 10 s) 50mAOperatingjunctiontemperature,TJ 40150 CStoragetemperature,Tstg165 C5 TPS92692 , MARCH2017 ProductFolderLinks: TPS92692 TPS92692 -Q1 SubmitDocumentationFeedbackCopyright 2017,TexasInstrumentsIncorporated(1)AECQ 100-002indicatesthat HBMstressingshallbe in accordancewith the ANSI/ESDA/JEDECJS-001specification.

6 (2)JEDEC documentJEP155statesthat 500-VHBM allowssafe manufacturingwith a standardESDcontrolprocess.(3)JEDEC documentJEP157statesthat 250-VCDM allowssafe manufacturingwith a PWP(HTSSOP)PACKAGEV(ESD)Electrostaticdis chargeHuman-bodymodel(HBM),per AECQ100-002,all pins(1) 2000 VCharged-devicemodel(CDM),per AECQ100-011 All pins except1, 10, 11, and 20 500 Pins1, 10, 11, and 20 750 TPS92692IN PWP(HTSSOP)PACKAGEV(ESD)Electrostaticdis chargeHuman-bodymodel(HBM),per ANSI/ESDA/JEDECJS-001,all pins(2) 2000 VCharged-devicemodel(CDM),per JEDEC specificationJESD22-C101,all pins(3) (unlessotherwisenoted) ,crankSupplyinput, , SWSwitchingfrequency80800kHz (CLAMP)VTAO peratingambienttemperature 40125 C(1)For moreinformationabouttraditionaland new thermalmetrics,see theSemiconductorand IC (1) TPS92692 TPS92692 -Q1 UNITPWP(HTSSOP)PWP(HTSSOP)20 PINS20 PINSR C/WR JC(top)Junction-to-case(top) C/WR C/W C/W C/WR JC(bot)Junction-to-case(bottom) C/W6 TPS92692 , TPS92692 -Q1 SLVSDD9.

7 TPS92692 TPS92692 -Q1 SubmitDocumentationFeedbackCopyright 2017,TexasInstrumentsIncorporated(1)All voltagesare with respectto 40 C TJ 150 C, VIN= 14 V, VIADJ= V, VRAMP= 500 mV, VDIM/PWM= 3 V, VOV= 500 mV, CVCC= 1 F, CVREF= 1 F,CCOMP= nF, RCS= 100 m , RT= 20 k , no load on GATEand PDRV(unlessotherwisenoted)(1)PARAMETERTE STCONDITIONSMINTYPMAXUNITINPUTVOLTAGE(VI N)IIN(STBY)Inputstand-bycurrentVPWM= 0 (SW)InputswitchingcurrentVCC= V, CGATE= 1 (VCC)VCC(REG)RegulationvoltageNo (UVLO)SupplyundervoltageprotectionVCCris ingthreshold,VIN= 8 ,VIN= 8 (LIMIT)SupplycurrentlimitVCC= 0 V303646mAVDOLDO dropoutvoltageICC= 20 mA, VIN= 5 V300mVREFERENCEVOLTAGE(VREF)VREFR eferencevoltageNo (LIMIT)CurrentlimitVREF= 0 V303646mAOSCILLATOR(RT) SWSwitchingfrequencyRT= 40 k 175200225kHzRT= 20 k 341390439kHzVRTRT (MIN)MinimumSYNC clockpulsewidth100nsSPREADSPECTRUMFREQUE NCYMODULATION(DM)IDMT rianglewavegeneratorsink current10 ATrianglewavegeneratorsourcecurrent10 AVDM(TR)Trianglewavevoltagepeak(High) (Low)850mVVDM(EN)Spreadspectrummodulatio nenablethreshold700mVVDM(CLAMP)Internalc lampvoltageVPWM= 0 V, RRAMP= 200 k (GATE)RGHG atedriverhigh side resistanceIGATE= 10 RGLG atedriverlow side resistanceIGATE= 10 CURRENTSENSE(IS)VIS(LIMIT)Currentlimit thresholdVDIM/PWM= 5 V, RRAMP= 249 k 0 V, RRAMP= 249 k 665700735mVtIS(BLANK)Leadingedgeblanking time88118158nstIS(FAULT)Currentlimit fault time35 stILMT(DLY)IS to GATE propagationdelayVISpulsedfrom0 V to 1 V78ns7 TPS92692 , MARCH2017 ProductFolderLinks.

8 TPS92692 TPS92692 -Q1 SubmitDocumentationFeedbackCopyright 2017,TexasInstrumentsIncorporatedElectri calCharacteristics(continued) 40 C TJ 150 C, VIN= 14 V, VIADJ= V, VRAMP= 500 mV, VDIM/PWM= 3 V, VOV= 500 mV, CVCC= 1 F, CVREF= 1 F,CCOMP= nF, RCS= 100 m , RT= 20 k , no load on GATEand PDRV(unlessotherwisenoted)(1)PARAMETERTE STCONDITIONSMINTYPMAXUNITPWMCOMPARATORAN DSLOPECOMPENSATION(SLOPE)DMAXM aximumduty cycle90%VSLOPEA daptiveslopecompensationVCSP= 24 V410mVVSLOPE(MIN)Minimumslopecompensatio noutputvoltageVCSP= 0 V72mVVLVIS to COMP levelshift voltageNo levelshift bias currentNo slopecompensationadded17 ACURRENTSENSEAMPLIFIER(CSP,CSN)V(CSP-CSN )CurrentsensethresholdsVCSP= 14 V, VIADJ= 3 14 V, VIADJ= (BW)Currentsenseunitygain bandwidth500kHzGCSC urrentsenseamplifiergainG = VIADJ/V(CSP-CSN)14K(OCP)Ratioof over-currentdetectionthresholdto analogadjustvoltageK(OCP)= V(OCP-THR) (BIAS)CSPbias currentVCSN= , VCSP= 14 V107 AICSN(BIAS)CSNbias currentVCSN= , VCSP= 14 V110 AFAULTINDICATOR(FLT)R(FLT)Open-drainpull downresistance241 t(FAULT_TMR)Faulttimer243648msCURRENTMON ITOR(IMON)IIMON(SRC)IMON sourcecurrentV(CSP-CSN)= 150 mV,VIMON= 0 V144 AVIMON(CLP) (OS)IMON bufferoffsetvoltage (IADJ)VIADJ(CLP)IADJ internalclampvoltageIIADJ= 1 (BIAS)IADJ inputbias currentVIADJ< (LMT)IADJ currentlimitingseriesresistorVIADJ> V12k ERRORAMPLIFIER(COMP)gMTransconductance12 1 A/VICOMP(SRC)COMP currentsourcecapacityVIADJ= V, V(CSP-CSN)= 0 V130 AICOMP(SINK)COMP currentsink capacityVIADJ= 0 V, V(CSP-CSN)= V130 AEA(BW)ErroramplifierbandwidthGain= 3 dB5 MHzVCOMP(RST)COMPpin resetvoltage100mVRCOMP(DCH)COMP dischargeFET resistance246 SOFT-START(SS) AVSS(UVP_EN)Soft-startvoltagethresholdto (RST)Soft-startpin resetvoltage50mVRSS(DCH)SS dischargeFET resistance240 OUTPUTVOLTAGEINPUT(OV)VOVP(THR) (THR) (UVP-BLANK)

9 Undervoltageprotectionblankingperiod4 sIOVP(HYS) A8 TPS92692 , TPS92692 -Q1 SLVSDD9 : TPS92692 TPS92692 -Q1 SubmitDocumentationFeedbackCopyright 2017,TexasInstrumentsIncorporatedElectri calCharacteristics(continued) 40 C TJ 150 C, VIN= 14 V, VIADJ= V, VRAMP= 500 mV, VDIM/PWM= 3 V, VOV= 500 mV, CVCC= 1 F, CVREF= 1 F,CCOMP= nF, RCS= 100 m , RT= 20 k , no load on GATEand PDRV(unlessotherwisenoted)(1)PARAMETERTE STCONDITIONSMINTYPMAXUNITINTERNALPWMRAMP GENERATOR(RAMP) ARampgeneratorsink AVRAMPR ampsignalpeak(high)3 VRampsignalvalley(low)1 VPWMINPUT(DIM/PWM)VPWM(HIGH)Schmitttrigg erlogiclevel(highthreshold)VRAMP= (LOW)Schmitttriggerlogiclevel(lowthresho ld)VRAMP= (PD)PWMpull-downresistance10M tDLY(RISE)PWMrisingto PDRV delayCPDRV= 1 nF294nstDLY(FALL)PWMfallingto PDRV delayCPDRV= 1 nF326nsSERIESP-CHANNELPWMFET GATEDRIVEOUTPUT(PDRV)VPDRV(OFF)P-channel gatedriveroff-statevoltageVCSP= 14 V14 VVPDRV(ON)P-channelgatedriveron-statevol tageVCSP= 14 (SRC)PDRV sink currentPulsed50mARPDRV(L)

10 PDRV driverpull up resistance82 THERMALSHUTDOWNTSDT hermalshutdowntemperature175 CTSD(HYS)Thermalshutdownhysteresis25 CJunction Temperature (oC)VCC Undervoltage Lockout Thresholds (V)-40-20020406080100120140 (kHz)RT (k:)50150250350450550650750 8001020304050607080100D005 Junction Temperature (oC)VCC Dropout Voltage (mV)-40-20020406080100120140 160100200300400500600D002 Junction Temperature (oC)VCC Current Limit (mA)-40-20020406080100120140 1603032343638404244D003 Junction Temperature (oC)VCC Regulation Voltage (V)-40-20020406080100120140 Temperature (oC)Reference Voltage (V)-40-20020406080100120140 , MARCH2017 ProductFolderLinks: TPS92692 TPS92692 -Q1 SubmitDocumentationFeedbackCopyright 2017, 25 C, VIN= 14 V, VIADJ= V, CVCC= 1 F, CCOMP= nF, RCS= 100 m , RT= 20 k , VPWM= 5 V, no load on GATEand PDRV(unlessotherwisenoted)Figure1. VCCR egulationVoltagevs JunctionTemperatureFigure2. VREFR eferenceVoltagevs JunctionTemperatureVIN= 5 V,IVCC= 20 mAFigure3.