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技领半导体ActiveSemiconductors@active-semi.com138-1836-9306PoweringHandheldPortableDeviceExternalInternalAC/DCChargerLi-ionBatteryDCPowerInternalDCPowerNeedNeedmanyDC/DCconvertersPowerconversionmustbeefficientIntelligentpowermanagementtoincreaseruntimeDC/DCConversionHighHighSwitchingregulator(Buck,Boost)MediumMediumChargepumpLowLowLinearlowdropoutregulator(LDO)ComplexityEfficiencyTechnologyHighEfficiencySwitchingRegulatorSynchronousrectificationOptimalswitchingcontrolBuckConverterBoostConverterPowerManagementUnitIntegratedsingle-chiptotalpowersolutionBatterycontrolandprotectionMulti-channelDC/DCconversionIntelligentpowermanagementCommunicationlinkBetterefficiencySmallsizeEasytobuild8-ChannelPMUICPMUforPortableMediaPlayerBattery+Screen+ProcessorbatteryprocessorLCMACT8700chargerBuck2Buck1W-leddriverVcoreVmemory+VIO4-channelPMUforMP3,MP4andPMP1.8’’-2.8’’AC/DCChargerRequirementdBkVkVkVDeg-C50-618150CISPR22/EN55022BIEC950/UL1950ContactAirFreeConvectionENVIROMENTALConductedEMISafetySurgeESDAmbientTemperatureVmAmVpp%5.257701505.07001004.7563061.3CECLimit,115or230VACOUTPUTVoltageCurrentRippleVoltageAverageEfficiencyVACHzW264640.350/60854785-264VAC,NoLoadINPUTVoltageFrequencyStandbyPowerUnitsMAXTPYMINConditionDescriptionChargerVoltage/CurrentCurveV-ICharacteristicVsVin00.511.522.533.544.555.50100200300400500600700800OutputCurrent(mA)OutputVoltage(V)85V110V220V264VHighlimitLowlimitHiccupEnergyEfficiencyRequirementStandbyPower:0.3WAverageefficiency:CEC(2007):0.09*ln(Po)+0.5EnergyStar(2008):0.08*ln(Po)+0.585AverageEfficiency40506070809012345678910OutputPower(W)Efficiency(%)EnergyStarCECRingChokeConverter(RCC)ChargerLowCost(NoPWMIC,HVNPN)VariablefrequencyInconsistentperformanceVdcVoPWMICChargerHighercost(PWMIC+HVMOSFET)FixedfrequencyBetterperformanceVdcVoEmitterSwitchingTopologySlowTurn-offFastTurn-offVceoRating(450V)VcboRating(700V)BaseSwitchingTopologyEmitterSwitchingTopology(BST)(EST)ESTPWMICChargerHighercost(PWMIC+HVNPN)FixedfrequencyGoodperformanceVdcVoSecondarySideRegulatorSecondaryCV/CCControlCircuitPrimarySideRegulatorImplementCV/CCcontrolinprimaryPWMICReducecomponentcountby25%Saveoverallcostby30%HigherefficiencyAccuracyaffectedbyline,load&transformerPSRChargerPerformanceEarlierPSRCV/CCBettercompensatedPSRCV/CCPSRCharger400V1KVT1EE16FR110RC14.7uF400VD3D4D1D2LNL11.5mHC24.7uFR7750KR8750KC32200pFR2300KR3100RD5FR107D6HER103R9390RQ1D13002SR11510RR433RD71N41482134FBVDDSWGU1ACT355HQ-AL3R67.68KR528.7KC44.7uFR10100RC7470pFR1210RC61000pFC5470uFVOGND1N4007x450V50V10V50VD8SB240C8220uFL219uH10VPCBLayout&AssemblyL=52mmW=30mmEE16StandbyPower&EfficiencyPass0.300.2310.1800.1360.122Po=0WPass/FailGreenModeLimit(W)264VAC(W)220VAC(W)110VAC(W)85VAC(W)ConditionStandbyPowerPass59.10%64.26%70.56%67.62%61.19%57.65%220Pass59.10%68.06%70.30%69.33%67.28%65.32%110Pass/FailCECLimit(%)AverageEff(%)100%Po(3.25W)75%Po(2.438W)50%Po(1.625W)25%Po(0.813W)VIN(VAC)AverageEfficiencyAccurateCV/CCPerformanceV-ICharacteristicVsVin00.511.522.533.544.555.50100200300400500600700800OutputCurrent(mA)OutputVoltage(V)85V110V220V264VHighlimitLowlimitHiccupV-ICharacteristicVsVin00.511.522.533.544.555.50100200300400500600700800OutputCurrent(mA)OutputVoltage(V)85V110V220V264VHighlimitLowlimitHiccupLp=1.59mH(=1.7mH-7%)Lp=1.82mH(=1.7mH+7%)ConclusionsEfficiencyIncreaseruntimeofportabledeviceMeetinternationalenergyefficiencystandardIntegrationExpandpowersystemmanagementReducesizeandweightImprovereliabilityandefficiencySaveoverallcost