1Features 1 •WideInputVoltage:4.5Vto65V •Betterthan±4%LEDCurrentAccuracyover–40°Cto150°CJunctionTemperatureRange •SpreadSpectrumFrequencyModulationfor ImprovedEMI •ComprehensiveFaultProtectionCircuitrywith CurrentMonitoroutputandOpenDrainFaultFlag Indicator •InternalAnalogVoltagetoPWMDutyCycle Generatorforstand-aloneDimmingOperation •CompatiblewithDirectPWMInputwithover 1000:1DimmingRange •AnalogLEDCurrentAdjustInput(IADJ)withover 15:1ContrastRatio •IntegratedP-ChannelDrivertoenableSeriesFET DimmingandLEDProtection •TPS92692-Q1:AutomotiveQ100Grade1 Qualified 2Applications •TPS92692-Q1:AutomotiveExteriorLighting Applications •DriverMonitoringSystems(DMS) •LEDGeneralLightingApplications •ExitSignsandEmergencyLighting 3Description TheTPS92692andTPS92692-Q1arehighaccuracy peakcurrentmodebasedcontrollersdesignedto supportstep-up/downLEDdrivertopologies.The deviceincorporatesarail-to-railcurrentamplifierto measureLEDcurrentandspreadspectrumfrequency modulationtechniqueforimprovedEMIperformance. ThishighperformanceLEDcontrollercan independentlymodulateLEDcurrentusingeither analogorPWMdimmingtechniques.Linearanalog dimmingresponsewithover15:1rangeisobtained byvaryingthevoltageacrossthehighimpedance analogadjust(IADJ)input.PWMdimmingofLED currentisachievedbydirectlymodulatingthe DIM/PWMinputpinwiththedesireddutycycleorby enablingtheinternalPWMgeneratorcircuit.The PWMgeneratortranslatestheDCvoltageat DIM/PWMpintocorrespondingdutycycleby comparingittotheinternaltrianglewavegenerator. TheoptionalPDRVgatedriveroutputcanbeusedto driveanexternalP-ChannelseriesMOSFET. TheTPS92692andTPS92692-Q1devicessupport continuousLEDstatuscheckthroughthecurrent monitor(IMON)output.Thedevicesalsoincludean opendrainfaultindicatoroutputtoindicateLED overcurrent,outputovervoltageandoutput undervoltageconditions.