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.

3 TPS92692 TPS92692 -Q1 SubmitDocumentationFeedbackCopyright 2017,TexasInstrumentsIncorporatedTableof Contents1 Pin Configurationand Applicationand Deviceand Mechanical,Packaging,and RevisionHistoryDATEREVISIONNOTESM arch2017*Initialrelease. 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%.

4 WithPWMgeneratordisabled,adirectPWMdimmi ngcommandcan be appliedto controlthe LEDcurrentduty cycleand analogor PWMcommandis usedto generatean internalPWMsignalthat controlsthe GATEand internalPWMsignalto logiclevellow, turnsoff switching,idlestheoscillator,disconnects the COMPpin, and sets PDRVto VCSP. 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.

5 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.

6 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.

7 (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)

8 C/WR C/W C/W C/WR JC(bot)Junction-to-case(bottom) C/W6 TPS92692 , TPS92692 -Q1 SLVSDD9 : 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)

9 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: 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)

10 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)Undervoltageprotectionblankin gperiod4 sIOVP(HYS) A8 TPS92692 , TPS92692 -Q1 SLVSDD9.