OB3398-Datasheet-铱宝-150602

©On-BrightElectronicsConfidentialPreliminaryDatasheetOB_DOC_DS_339801-1-HighPrecisionOff-linePrimary-SidePWMPowerSwitchOB3398GENERALDESCRIPTIONOB3398isaprimarysideregulationoff-lineLEDlightingcontrollerwhichcanachieveaccurateLEDcurrent.ItsignificantlysimplifiesLEDlightingsystemdesignbyeliminatingthesecondarysidefeedbackcircuitry.ProprietaryConstantVoltage(CV)andConstantCurrent(CC)controlisintegratedasshowninthefigurebelow.TheLEDcurrent(CCcontrol)canbeadjustedexternallybytheresistorRsatCSpin.OB3398offerscomprehensiveprotectioncoveragewithauto-recoveryfeaturesincludingCycle-by-Cyclecurrentlimiting,VDDclampandUVLO.ExcellentEMIperformanceisachievedwithOn-Brightproprietaryfrequencyshufflingtechnique.OB3398isofferedinSOT23-5package.Fig.1.TypicalCC/CVCurveFEATURESHighPreciseConstantCurrentRegulationatUniversalACinputPrimary-sideSensingandRegulationWithoutTL431andOpto-couplerFloatingPSRcontrolschemewithtwotransformerwindingsAdjustableConstantCurrentandOutputPowerSettingBuilt-inPrimarywindinginductancecompensationBuilt-inLeadingEdgeBlanking(LEB)Cycle-by-CycleCurrentLimitingVDDUnderVoltageLockoutwithHysteresis(UVLO)Overtemperatureprotection(OTP)VDDClampAPPLICATIONSLowPowerAC/DCofflineSMPSforLEDapplicationsTYPICALAPPLICATIONOn-Brightconfidentialto©On-BrightElectronicsConfidentialPreliminaryDatasheetOB_DOC_DS_339801-2-HighPrecisionOff-linePrimary-SidePWMControllerOB3398GENERALINFORMATIONPinConfigurationSOT23-5.OrderingInformationPartNumberDescriptionOB3398MPSOT23-5,Pb-free,T&RPackageDissipationRatingPackageRθJA(℃/W)SOT23-5200AbsoluteMaximumRatingsParameterValueGateVoltage-0.3to25VVDDVoltage-0.3toVDD_clampCSInputVoltage-0.3to7VFBInputVoltage-0.3to7VMin/MaxOperatingJunctionTemperatureTJ-40to150℃OperatingAmbientTemperatureTA-40to85℃Min/MaxStorageTemperatureTstg-55to150℃LeadTemperature(Soldering,10secs)260℃Note:Stressesbeyondthoselistedunder“absolutemaximumratings”maycausepermanentdamagetothedevice.Thesearestressratingsonly,functionaloperationofthedeviceattheseoranyotherconditionsbeyondthoseindicatedunder“recommendedoperatingconditions”isnotimplied.Exposuretoabsolutemaximum-ratedconditionsforextendedperiodsmayaffectdevicereliability.RecommendedOperatingConditionSymbolParameterRangeVDDVDDSupplyVoltage12to25VOn-Brightconfidentialto©On-BrightElectronicsConfidentialPreliminaryDatasheetOB_DOC_DS_3398013HighPrecisionOff-linePrimary-SidePWMControllerOB3398MarkingInformation398YWW.ZZZsY:YearCodeWW:WeekCode(01-52)ZZZ:Lotcodes:InternalcodeTERMINALASSIGNMENTSPinNumPinNameI/ODescription1GATEOGatedriveroutput2CSICurrentsenseinput.3VDDPPowerSupply4FBIConnectedtoresistordividerfromprimarywindingorauxiliarywindingtoreflectoutputvoltage.5GNDPGroundOn-Brightconfidentialto©On-BrightElectronicsConfidentialPreliminaryDatasheetOB_DOC_DS_339801-4-HighPrecisionOff-linePrimary-SidePWMControllerOB3398BLOCKDIAGRAMEAOn-Brightconfidentialto©On-BrightElectronicsConfidentialPreliminaryDatasheetOB_DOC_DS_339801-5-HighPrecisionOff-linePrimary-SidePWMControllerOB3398ELECTRICALCHARACTERISTICS(TA=25℃,VDD=16V,ifnototherwisenoted)SymbolParameterTestConditionsMinTyp.MaxUnitSupplyVoltage(VDD)SectionIstartupStartupCurrentVDD=UVLO_OFF-1V420uAIDDopOperationCurrentOperationsupplycurrentFB=1V,CS=0V,VDD=20V-0.451mAUVLO(ON)VDDUnderVoltageLockoutEnterVDDfalling7.38.39.3VUVLO(OFF)VDDUnderVoltageLockoutExitVDDrising15.516.517.5VVDD_clampMaximumVDDoperationvoltageIDD=20mA25VCurrentSenseInputSectionTLEBLEBtime500nsVth_ocOvercurrentthreshold492500508mVTd_ocOCPPropagationdelay100nsFrequencySectionFreq_MaxNoteICMaximumfrequency103KHzToff_minMinimumToff4.0usF_minMinimumfrequency103Hzᇞf/FreqFrequencyshufflingrange±7%ErrorAmplifiersectionVref_EAReferencevoltageforEA1.141.21.26VGainDCgainofEA40Vth_OVPLoadOVPthresholdvoltage1.4VGateDriverSectionVOLOuputlowlevel@VDD=14V,Io=5mA1VVOHOuputhighlevel@VDD=14V,Io=20mA6VV_clampingOutputclampvoltage10VT_rOutputrisingtime1V~9V@CL=500pF95nsT_fOutputfallingtime9V~1V@CL=500pF50nsOnchipOvertemperatureSectionT_otpOvertemperatureprotectiontriggerpoint135℃T_otp_recOvertemperatureprotectionrecoverypoint120℃Note:1.Freq_MaxindicatesICinternalmaximumclockfrequency.Insystemapplication,themaximumoperationfrequencyof103KHznominaloccursatmaximumoutputpowerorthetransitionpointfromCVtoCC.On-Brightconfidentialto©On-BrightElectronicsConfidentialPreliminaryDatasheetOB_DOC_DS_339801-6-HighPrecisionOff-linePrimary-SidePWMControllerOB3398CHARACTERIZATIONPLOTSVdd(V)vsIvdd(uA)02004006008001000791113151719VDD(V)Ivdd(uA)Istartup(uA)vsTemperature12.23.44.65.87-40-10205080110140Temperature(℃)Istartup(uA)UVLO(ON)(V)vsTemperature88.28.48.68.89-40-10205080110140Temperature(℃)UVLO(ON)(V)UVLO(OFF)(V)vsTemperature1616.416.817.217.618-40-10205080110140Temperature(℃)UVLO(OFF)(V)Vref(V)vsTemperature1.11.141.181.221.261.3-40-10205080110140Temperature(℃)Vref(V)Vocp(V)vsTemperature00.20.40.60.81-40-10205080110140Temperature(℃)Vocp(V)On-Brightconfidentialto©On-BrightElectronicsConfidentialPreliminaryDatasheetOB_DOC_DS_339801-7-HighPrecisionOff-linePrimary-SidePWMController