Power Supply Solutions

PowerSupplySolutionsforsmall/medium/bigsizeLCD-PDP/TVContent¾ClassicalApproach:¾60WSMPS(20”)¾200WSMPS(upto30-32”)¾ResonantApproach:¾70WSMPS(20”)¾180WSMPS(upto30”)¾500WSMPS(upto50”LCD-TV,42”PDP-TV60WLCD-TVPowerSupply:BlockDiagramVac+12VFeedbackAdvancedPWMControllerPowerSupplyUnitEMIfilter&BridgeRectifier•OperationclosetotheboundarybetweenCCMandDCM:variableoperatingfrequency•ZeroVoltage/ZeroCurrentSwitchingatturn-onachievable•LessEMIgenerated•Variablefrequencyspreadsspectrum•Stand-ByfunctionputintooptionalAccurateOCPandOVPcircuitarebuildinginthesimplecanbeoptional.5A12VRemarksCurrentTotalOutputPower:60WVoutSingleOutputVoltage(Vout):WideInputVoltageRange:90-265VAC60WLCD-TVPowerSupply:SpecificationsL656560WLCD-TVPowerSupply:Schematic60WLCD-TVPowerSupply:TestingReport87.4%264V87.0%240V83.2%100V81.7%90VNoLoadStandByInputPowerFLEff.InputVoltageTestingResults0ANoLoad0.0416A(0.5W)StandBy5AFullLoad(FL)12VOuputTestLoadingLoadingefficiencyA60WLCD-TVPowerSupplyL6565:Quasi-ResonantSMPScontroller•CurrentModeQuasi-ResonantPWMcontroller•MicropowerStart-upCurrent(40µAtyp.)•LowQuiescentCurrent(3mAtyp.)•ZCDinputforQRoperation/externalsynchronization•FrequencyFoldbackfunction•LineVoltageFeedforwardfunction•Pulse-by-pulseovercurrentprotection•2ndovercurrentlevelwithHiccup-modeoperation•Disablefunction•InternalRCfilteronCurrentSense•Package:MinidipandSO8QRConversion:Quasi-ResonantConceptVinCinLmLlkCdVoutLpLsVDS¾ZVScondition:Vin≤VR¾OperationclosetotheboundarybetweenCCMandDCM:variableoperatingfrequency¾ZeroVoltage/ZeroCurrentSwitchingatturn-onachievable¾LessEMIgenerated¾VariablefrequencyspreadsspectrumzLp&CdzLlk&CdzVinztzVDSzVRzIpzPrizSeczTFWzT=1/fswzTONzTvzIPKpzIPKszZVSzNOZVS!zVDS@Vin2VinzVin2zIp@Vin2VinzIs@Vin2VinEMCfilter&BridgeRectifierDCDCconv.+5V+24V+12VFeedbackPFC+PWM+AuxL6562+L5991+L6590+5VstandbyVac200WLCD-TVPowerSupply:BlockDiagramPowerSupplyUnit•PFC200WcriticalcontrolmodewithZCDfunctionforacost-effectiveapplication•MainConverter200WFlybackConverterformiddlesizeLCD-PDP/TVapplication•Standby10WFlybackconverterwithbuild-inmosfetPWMcontrollerandcircuittoswitchoff200WLCD-TVPowerSupply:Specifications5VoutputuseDC-DCconverterwhichcanbeputinoptional.6A3A2A2A24V12V5V5VsbRemarksCurrentTotaloutputPower:200WVoutMultiOutputVoltages(Vout):WideInputvoltagerange:90-265VAC200WLCD-TVPowerSupply:SchematicAdvancedPWMControllerL6562+L5991+L6590L5973D200WLCD-TVPowerSupply:TestingReport87.5%264V86.8%220V84.3%120V81.6%90VNoLoadStandbyInputPowerFLEff.InputvoltageTestingresult0000NoLoad0.1000Standby2236Fullload(FL)5VSB5V12V24VOutputsTestLoadingLoadingefficiency200WLCD-TVPowerSupplyL6562-PowerFactorCorrector•TRANSITION-MODE•PROPRIETARYMULTIPLIERDESIGNFORMINIMUMTHDOFACINPUTCURRENT•LOW(4mA)QUIESCENTCURRENT•ON-CHIPFILTERONCURRENTSENSE•1%(@Tj=25°C)INTERNALREFERENCEVOLTAGE•-600/+800mATOTEMPOLEGATEDRIVERWITHUVLOPULL-DOWNANDVOLTAGECLAMPL5991/APrimaryPWMController•CM1MHzPWMController•LowStart-UpCurrent(150µA)•LowQuiescentCurrent(7mAtyp.)•Standbyfunction•Programmable'Hiccup‘ModeOvercurrentProtection•IN/OUTSynchronization•PreciseDutyCycleControlLatched•Shutdown/OvervoltageProtection•ProgrammableSoft-Start•Internal100nsLeadingEdgeBlankingonCurrentSense•Package:DIP-16/SO-16L6590/AFullyIntegratedPowerSupplyL6590-StandbyFunctionContactPersonsinShenzhenMMXTechnicalCenterApplicationEngineer23318601郭加总GuoTomSeniorApplicationEngineer1369222212823348601郭青山GuoSamSeniorApplicationEngineer23278601陈治国ChenRoyApplicationEngineer23118601彭超PengChaoT/CDeputyManager975212751360261666223068601方弘均BANGHGA&PLab,IndustrialandPowerTeamFaxnumber:8601-2300Operator:8601-2000HONGKONGCHINAFUNCTION/REMARKSMOBILETELEPHONENO.CHINESENAMENAMEAnewapproach:HalfBridgeResonanttopologyinLCDTVwithSTL6598controllerLCDTVpowersupplyconfigurationACFilter+RectifierPFCstageDC-DCstageDC-DCstageLNAuxiliaryPowerMainPower400VdcInverterAudioTunerLogicIC5V24V18V9V5V,3.3VuPPFCstageinMainPowerPoofPFC23”LCDTV120W26”LCDTV160W30”LCDTV180W220W300W460W600W40”LCDTV50”LCDTV42”PDPTV250W150W400W250WL6561orL6562inTransitionModeL6562withFixedOff-TimeControlL4981inContinuousConductionModeDC-DCstageinmainpowerStepdownconverterStepdownconverterL6598L5973,L4973LM317400VdcInverterTunerHalfBridgeResonantController+SynchronousrectificationHalfBridgeResonantConverter24V18V5V,3.3V9VAudioL6997,L6910StepdownconverterLogicICPowerratingforinverter,audio,tuner,andlogicICinLCDTVInverter:30”-12V/10A,20V/6A,24V/5A42”-24V/10A50”-120V/3AAudio:12V/2.5A(classD)18V/2A(classAB)Tuner:8V,9V,30V,33VLogicIC:5V/4A,3.3V/3AL6598Withhighefficiency,lowEMI,costeffectivenessandhighpowerdensity,itisagoodsolutionforbuilt-inLCDTVpowersuppliesHalfBridgeResonantControllerL6598MainFeatures•Resonantcontrollerupto400KHz•Highvoltagerailupto600V•Lowstartupcurrent(250uA)•Lowquiescentcurrent(2mA)•Latched/nonlatcheddevicedisable•50%dutycyclehalfbridgedriver•Programmablesoftstart•Integratedbootstrapdiode•350nSdeadtime•OPAMPforfurtherprotections(Brownout,OTP…..)•Package:DIP16/SO16L6598internalblockdiagramInternalbootstrapdiodeLatchNonlatchL6598transformertopolo