OB233FSP

©On-BrightElectronicsConfidentialPreliminaryDatasheetOB_DOC_DS_233F01-1-OB233FHighPerformanceCurrentModePWMPowerSwitchGENERALDESCRIPTIONOB233FcombinesadedicatedcurrentmodePWMcontrollerwithahighvoltagepowerMOSFET.Itisoptimizedforhighperformance,lowstandbypower,andcosteffectiveoff-lineflybackconverterapplications.OB233FofferscompleteprotectioncoveragewithautomaticrecoveryfeatureincludingCycle-by-Cyclecurrentlimiting(OCP),overloadprotection(OLP),overtemperatureprotection(OTP),overvoltageprotectionandVDDundervoltagelockout(UVLO).ExcellentEMIperformanceisachievedwithOn-Brightproprietaryfrequencyshufflingtechniquetogetherwithsoftswitchingcontrolatthetotempolegatedriveoutput.Thetoneenergyatbelow20KHZisminimizedinthedesignandaudionoiseiseliminatedduringoperation.OB233FisofferedinDIP7package.APPLICATIONSOfflineAC/DCflybackconverterfor■AC/DCadapter■PDApowersupplies■Digitalcamerasandcamcorderadapter■VCR,SVR,STB,DVD&DVCDPlayerSMPS■Set-topboxpower■AuxiliarypowersupplyforPCandServer■Open-frameSMPSFEATURES■Standbypowerlowerthan100mWatuniversalACinput■PoweronsoftstartreducingPowerMOSFETVdsstress■FrequencyshufflingforEMI■Extendedburstmodecontrolforimprovedefficiencyandminimumstandbypowerdesign■Audionoisefreeoperation■Fixed65KHZ(typical)switchingfrequency■Internalsynchronizedslopecompensation■LowVDDstartupcurrentandlowoperatingcurrent■Leadingedgeblankingoncurrentsenseinput■ComprehensiveprotectioncoverageoVDDundervoltagelockoutwithhysteresis(UVLO)oOvertemperatureprotection(OTP)withauto-recoveryoOn-BrightproprietarylineinputcompensatedoCycle-by-Cycleover-currentthresholdsettingforconstantoutputpowerlimitingoveruniversalinputvoltagerange.oAccurateoverloadprotection(OLP).oOvervoltageprotection(OVP)oSecondaryrectifiershortprotectionTYPICALAPPLICATIONOutputPowerTable230VAC±15%85-265VACProductAdapter1Adapter1OB233F23W18WNotes:1.Maximumpracticalcontinuouspowerinanadapterdesignwithsufficientdrainpatternasaheatsink,at40℃ambient.On-Brightconfidentialto©On-BrightElectronicsConfidentialPreliminaryDatasheetOB_DOC_DS_233F01-2-OB233FHighPerformanceCurrentModePWMPowerSwitchGENERALINFORMATIONPinConfigurationTheOB233FisofferedinDIP7packageasshownbelow.OrderingInformationPartNumberDescriptionOB233FSPDIP7,Pb-freePackageDissipationRatingPackageRJA(℃/W)DIP775Note:DrainPinConnectedto100mm2PCBcopperclad.AbsoluteMaximumRatingsParameterValueDrainvoltage(offstate)-0.3VtoBVdssVDDvoltage-0.3Vto30VVDD-Ginputvoltage-0.3Vto30VFBinputvoltage-0.3to7VSenseinputvoltage-0.3to7VMin/MaxoperatingjunctiontemperatureTJ-40to150℃Min/MaxstoragetemperatureTstg-55to150℃Leadtemperature(soldering,10secs)260℃Note:Stressesbeyondthoselistedunder“absolutemaximumratings”maycausepermanentdamagetothedevice.Thesearestressratingsonly,functionaloperationofthedeviceattheseoranyotherconditionsbeyondthoseindicatedunder“recommendedoperatingconditions”isnotimplied.Exposuretoabsolutemaximum-ratedconditionsforextendedperiodsmayaffectdevicereliability.OB233FXXCurrentModePWMPowerSwitchPackageS:DIP7PackagePb-freeP:Pb-freeOn-Brightconfidentialto©On-BrightElectronicsConfidentialPreliminaryDatasheetOB_DOC_DS_233F01-3-OB233FHighPerformanceCurrentModePWMPowerSwitchMarkingInformationTERMINALASSIGNMENTSPinNameI/ODescriptionGNDPGroundFBIFeedbackinputpin.ThePWMdutycycleisdeterminedbyvoltagelevelintothispinandthecurrent-sensesignalatPin4.VDD-GPInternalgatedriverpowersupplySenseICurrentsenseinputVDDPICDCpowersupplyInputDrainOHVMOSFETdrainpin.ThedrainpinisconnectedtotheprimaryleadofthetransformerOn-Brightconfidentialto©On-BrightElectronicsConfidentialPreliminaryDatasheetOB_DOC_DS_233F01-4-OB233FHighPerformanceCurrentModePWMPowerSwitchBLOCKDIAGRAMVDD2OVPDrainSENSE5/64FB3ROLPCurrentReferenceGND7PWMComparatorCPLOSCExtendedBurstmodeRSQInternalsupplyBurstmodeUVLOSlopecompensationOCPVthLDOPORDebounceRLEBSoftDriverSoftStartOTP1VDD_GPowerMOSFETInternalsupplyOn-Brightconfidentialto©On-BrightElectronicsConfidentialPreliminaryDatasheetOB_DOC_DS_233F01-5-OB233FHighPerformanceCurrentModePWMPowerSwitchELECTRICALCHARACTERISTICS(TA=25℃,VDD=16V,unlessotherwisenoted)SymbolParameterTestConditionsMinTypMaxUnitSupplyVoltage(VDD)IstartupVDDstartupcurrentVDD=UVLO(OFF)-1V,measureleakagecurrentintoVDD520uAIVDD_OperationOperationcurrentVFB=3V1.6mAUVLO(ON)VDDundervoltagelockoutenter7.08.09.0VUVLO(OFF)VDDundervoltageLockoutExit(Recovery)15.216.217.2VOVP(ON)OvervoltageprotectionvoltageCS=0V,FB=3VrampupVDDuntilgateclockisoff27.52930.5VFeedbackinputsection(FBpin)VFB_OPENVFBOpenLoopVoltage4.95.56.1VIFB_SHORTFBpinshortcircuitcurrentShortFBpintoGNDandmeasurecurrent0.35mAVTH_0DZerodutycycleFBthresholdvoltage0.8VVTH_PLPowerlimitingFBthresholdvoltage4.6VTD_PLPowerlimitingdebouncetime50mSecZFB_INInputimpedance15.7KohmCurrentsenseinput(Sensepin)Softstarttime4msTblankingLeadingedgeblankingtime270nsZSENSE_INInputimpedance40KohmTD_OCOvercurrentdetectionandcontroldelayFromovercurrentoccurstillthegatedriveroutputstarttoturnoff80nSecVTH_OCInternalcurrentlimitingthresholdvoltageFB=3.3V0.720.750.78VOscillatorFOSCNormaloscillationfrequency606570KHZ△fT