OB2570昂宝控制器

©On-BrightElectronicsConfidentialPreliminarydatasheetOB_DOC_DS_2570x00-1-HighPerformanceQRmodePrimary-SidePowerSwitchOB2570xGENERALDESCRIPTIONOB2570xisanexcellentprimarysideregulationcontrollerwithCC/CVoperationformediumlevelpowerAC/DCchargerandadapterapplications.ThedeviceintegratesaninternalpowerMOSFETandoperatesinQRmodetoprovidehighefficiencyalongwithseveralfunctionsofbuilt-inprotections.Itremovestheneedforsecondaryfeedbackcircuitrytolowerthetotalbillofmaterialcost.ProprietaryConstantVoltage(CV)andConstantCurrent(CC)controlisintegratedasshowninthefigurebelow.InCVcontrol,thecontrollerchangesthemodeofoperationaccordingtoloadcondition.Atfullloading,thecontrolleroperatesinquasi-resonant(QR)modeintheuniversallinevoltage.TheprimarysideregulationpowersuppliesuptohighpowerwithouttheefficiencylimitationofDCMoraudiblenoise.InCCcontrol,OB2570xsamplestheVcspeakcurrentandthedemagnetizationpulsetoregulationtheoutputcurrent.ThecurrentandoutputpowersettingcanbeadjustedexternallybythesenseresistorRsatCSpin.OB2570xofferscomprehensiveprotectioncoveragewithauto-recoveryfeatureincludingCycle-by-Cyclecurrentlimiting,VDDOVP,OLP,SCP,OTPetc.OB2570xconsumeslessthan75mWinputpoweratno-loadconditionwithhighlinevoltage.OB2570xisofferedinSOP8package.Figure.1.TypicalCC/CVCurveFEATURESPrimary-sidesensingandregulationoperatesinQRmodewithoutTL431andopto-couplerHighprecisionconstantvoltageandcurrentregulationatuniversalACinputProgrammableCVandCCregulationIntegratedpowerMOSFETGooddynamicresponseBuilt-inlinecompensationfortightCCregulationBuilt-infixedcablecompensationBuilt-inprimarywindinginductancecompensationBuilt-incontrolloopcompensationBuilt-inleadingedgeblanking(LEB)Ultralowstart-upcurrentandlowoperatingcurrentComprehensiveprotectioncoveragewithauto-recoveryVDDovervoltageprotection(VDDOVP)VDDundervoltagelockoutwithhysteresis(UVLO)Cycle-by-cyclecurrentlimitingFeedbackopenloopprotection(OLP)Outputshortcircuitprotection(SCP)APPLICATIONSMediumlevelPowerAC/DCofflineSMPSforCellphonechargerTabletPCAC/DCadapterSet-topboxpowersuppliesTYPICALAPPLICATIONOn-Brightconfidentialto©On-BrightElectronicsConfidentialPreliminarydatasheetOB_DOC_DS_2570x00-2-HighPerformanceQRmodePrimary-SidePowerSwitchOB2570xGENERALINFORMATIONPinConfigurationThepinmapisshownasbelowforSOP8.FBVDDDRAIN1236GND5CS478DRAINDRAINDRAINOrderingInformationPartNumberDescriptionOB2570PCPSOP8,Halogen-freeinTubeOB2570PCPASOP8,Halogen-freeinT&ROB2570TCP-HSOP8,Halogen-freeinTubeOB2570TCPA-HSOP8,Halogen-freeinT&RPackageDissipationRatingPackageRθJA(℃/W)SOP8150AbsoluteMaximumRatingsParameterValueVDDVoltage-0.3to30VFBInputVoltage-0.3to7VRTInputVoltage-0.3to7VCSInputVoltage-0.3to7VGATEInputVoltage-0.3to24VMin/MaxOperatingJunctionTemperatureTJ-40to150℃OperatingAmbientTemperatureTA-20to85℃Min/MaxStorageTemperatureTstg-55to150℃LeadTemperature(Soldering,10secs)260℃Note:Stressesbeyondthoselistedunder“absolutemaximumratings”maycausepermanentdamagetothedevice.Thesearestressratingsonly,functionaloperationofthedeviceattheseoranyotherconditionsbeyondthoseindicatedunder“recommendedoperatingconditions”isnotimplied.Exposuretoabsolutemaximum-ratedconditionsforextendedperiodsmayaffectdevicereliability.RecommendedOperatingConditionSymbolParameterRangeVDDVDDSupplyVoltage9to25VOB2570xXXX-XHighPerformanceQRmodePrimary-SidePowerSwitchPackageH:650VBlank:TubeA:Tape/ReelPackingPackageGreenP:Halogen-freeBVdssC:SOP8MarkingInformationOn-Brightconfidentialto©On-BrightElectronicsConfidentialPreliminarydatasheetOB_DOC_DS_2570x00-3-HighPerformanceQRmodePrimary-SidePowerSwitchOB2570xTERMINALASSIGNMENTSPinNumPinNameI/ODescription1VDDPPowerSupply2GNDPGround3FBIThevoltagefeedbackfromauxiliarywinding.Connectedtoresistordividerfromauxiliarywindingreflectingoutputvoltage.4CSICurrentsenseinput.Connectasenseresistorfromthispintoground.5,6,7,8DRAINOInternalMOSFETDRAINoutputOn-Brightconfidentialto©On-BrightElectronicsConfidentialPreliminarydatasheetOB_DOC_DS_2570x00-4-HighPerformanceQRmodePrimary-SidePowerSwitchOB2570xBLOCKDIAGRAMOn-Brightconfidentialto©On-BrightElectronicsConfidentialPreliminarydatasheetOB_DOC_DS_2570x00-5-HighPerformanceQRmodePrimary-SidePowerSwitchOB2570xELECTRICALCHARACTERISTICS(TA=25℃,VDD=18V,ifnototherwisenoted)SymbolParameterTestConditionsMinTyp.MaxUnitSupplyVoltage(VDD)SectionIstart-upStartupcurrentVDD=UVLO_OFF-1V515uAIstandyStandbycurrent0.220.30mAIop_sOperatingcurrentFB=1V,gatenoload.1.52.0mAUVLO(OFF)VDDundervoltagelockoutexit13.815.416.6VUVLO(ON)VDDundervoltagelockoutenter6.577.5VVDD_OVPVDDovervoltageprotection262830VCurrentSenseInputSectionTLEBLEBtime325nsTD_OCOCPpropagationdelay100nsVth_ocp_maxMaximumovercurrentthreshold800mVVcs_dpfmDPFMmodeMinimumCSthreshold175mVFBInputSectionVref_fbReferencevoltageforfeedbackthreshold1.9822.02VV_OVPOutputOvervoltagethreshold2.52.62.7V∆cable_max/VoutMaximumcablecompensationtoVoutratioOB2570PCP6%OB2570TCP-H2%CCLoopSectionVref_ccCCloopreference329335341mVGmCCloopintegratortransconductance1uSTimerSectionFs_maxCVQRmaximumfrequency859095KHzFminMinimumswit