携数字控制技术引领照明方向iwatt五届通用研讨会

DigitalPowerTechnologyDigitalPowerTechnologyEnablestheLow-CostQuality-LightSSLLampsiWattLosGatos,Big-Bit2012LEDDriverQualityofQualityofLightQualityofQualityofLightandUser2WhatistheQualityofWhatistheQualityofLight?Let’sreadthis3Let’swatchashortLet’swatchashortclip4FrequentlyAskhttp://www.nrc-FrequentlyAskhttp://www.nrc-5FrequentlyAskWhatisthelight-LightflickerrefersFrequentlyAskWhatisthelight-Lightflickerreferstoquick,repeatedchangesinlightintensity-lightthatappearstoflutterandbeunsteady.Itiscausedwhenthevoltagesuppliedtoalightsourcechangesorwhenthepowerlinevoltageitselffluctuates.Thisisduetothenatureoftheelectricalsupply,whichisACoralternatingcurrent.-Doestheflickercanbeaffectedby-Theflickerisn'tevenperceptibletothevastmajorityofpeople.Onlyatinypercentageareaffected.Theseverityoftheflickerdependsonseveral-howoftenandregularlythevoltagefluctuates,whichistypically110to120timespersecondinNorthAmerica,50to60timespersecondinEnglandandEurope.howmuchofavoltagechangeoccurs,thekindoflightthegainfactorofthetheamountoflightinthelightedareaprovidedbynon-fluorescentReferto:----6FrequentlyAskCanyouactuallyseelightsFrequentlyAskCanyouactuallyseelights-Peoplecannotnoticetheflickerinfluorescentlightsthathaveaflickerrateof120cyclespersecond(or120Hz).However,justbecauseyoucannotnoticedoesnotmeanthatitcannotaffectyou.Thelightflickermaybedetectedbyitsstroboscopic-Arethereanyhealtheffectsassociatedwithlight-Although,asstatedearlier,humanscannotseefluorescentlightsflicker,thesensorysysteminsomeindividualscansomehowdetecttheflicker.Eversincefluorescentlightingwasintroducedinworkplaces,therehavebeencomplaintsabouteyestrain,andgeneraleye7RequirementfortheDriverModule(JEL(OutputcurrentwaveformfortheRequirementfortheDriverModule(JEL(OutputcurrentwaveformfortheIr_p-p/ILED(ave)Ir_p-p(RippleIftheILED(ave)=350mA,Ir_p-p<455mA8Inordertoavoida)differenceofthepeakoutputcurrentforeachhalfcycle(AC)shouldbelessthan4%b)Rippleratioofthelampcurrentshouldbelessthan“1.3”ripplefrequencyshouldbe>CanLEDproductlightwithoutCanCanLEDproductlightwithoutCanLEDproducelightwithoutItisaDCcurrent,flowsone-directiononlytogeneratewhitelight9ASimpleSwitchwithoutDoesitworkveryASimpleSwitchwithoutDoesitworkveryTheRolesofLEDAllTheRolesofLEDAllDriverFlickerFreeSafetyLightstheUserDimmingUserDimmingACvoltagedistortion,fluctuationAClinefrequencyshift/stepDimmingrange,smoothness,monotonicbehaviorCycle-by-cycleinrushcurrentLEDopenandshortDimmer-safe●●OfflineLEDLampDriverBuck-OfflineLEDLampDriverBuck-Non-Single-stageVs2-stageBasicFlyback:Single-stageNoSingle-stageVs2-stageBasicFlyback:Single-stageNoHigh-voltagebulke-capConcernsofinvisibleflicker<LinefrequencyrippleLightningHot-LargeOutputHardtostart-Boost+Flyback:Two-stageEasyforimpedancebalancebetweendimmerandLEDcurrentregulationMoreiWattintroducedthesingle-stagebackto2004Power-/E-/Ripple-EnergystarforPF:0.5,Power-/E-/Ripple-EnergystarforPF:0.5,0.7,IEC61000-3-2forPFandKoreaneedPF>0.9E-E=½HighripplecurrentgetHighripplealsoimpactthereliabilityfoecurrentfromsinglewithsmallcapacitoratoutputALow-costatQualityDimmableALow-costatQualityDimmableOneplatformconfiguresallyouPF>0.9,LowTHD,All-dimPF>0.7,High,All-dimIsolatedorNon-isolatedDCHighqualitylightcontrol,>150HzDimmingFrequencyHighDimmerCompatibility:Smooth,seamless,widerangeParallelwithmorelampsperdimmerHot-swapdrivermoduleandToleratemorelinedistortionandsurgewithtightLEDiW3614ApproachtoAchieveHigh-PFandDimmer~8-PinControllerThechoppingcircuitprovidesrequiredimpedancetomatchthedimmeroperation.Thecontrollerdetectsthephaseinformationandconverttotherequiredoutputcurrentlevel.TheFlybackconversionstagefinallyiW3614ApproachtoAchieveHigh-PFandDimmer~8-PinControllerThechoppingcircuitprovidesrequiredimpedancetomatchthedimmeroperation.Thecontrollerdetectsthephaseinformationandconverttotherequiredoutputcurrentlevel.TheFlybackconversionstagefinallyprovidestherequiredloadingASimpleConfigurationtoCombineASimpleConfigurationtoCombinetheDimmerDetectionandPFCUniqueMethodtoConfiguretheDimmerTypeProvidethePureresistiveimpedancetoWallDimmerLinecurrentshapetoimprovepowerfactorReduceAC-cycleInrushChoppingcircuitdecouplestherequirementsbetweentheDimmerandtheLED.Dimmingdesignsarehighlyreusablewhichreducesthedevelopingtimeandcost.DimmerPhase-cutDetectionandDimmingDimmerPhase-cutDetectionandDimmingAveragevoltagemeasurement–-OtherPhase-cut--Rectifier--RCFilter--Phasedetectionandduty StartupandDimmerTheStartupandDimmerThephase-cutvoltagecomesfromdimmer,afterbridge,itappearsas100Hz(or120Hz)atRvinresistor,anintegraldiodebetweenVinpinandVccpin,thecurrentchargeVcccapacitortillVccreach12V.ICstarttoworkandturnontheMOSFETofVinpin,Vinpinvoltagewillbeascaleofinputtounderstandwhatisrealinputvoltageandphase-cutdutyDigitalDimmingEliminatesDigitalDimmingEliminatesUn-balanceforeachhalfcycle,willbringflickersometimesLinevoltagedipanddistortionwillgetLEDflickerfromsomedimmingsolutioniWattTemperatureDriftingandLEDLightingfixtureandVtTemperatureDriftingandLEDLightingfixtureandVtpin•IftemperatureexceedstheOTPthreshold,LEDcurrentwilldecreasevialinearfunctionIftemperatureishigherandclosetothermalshuntdownthreshold,LEDcurrentwillgodownto10%ChooseNTCtosetOTP••全面的保护功能Iw3612/3614输入过电压保护检测VinPIN全面的保护功能Iw3612/3614输入过电压保护检测VinPIN电压,Fail-SafeMode:数字式保护,LED闪烁三保护响应低输入功Iw36123614输出过电压保护LEDs检测VsensePIN电压正常Vsense电压低于Vsense>1.538V,DisablePFC(choppingboost)Vsense>1.7V,auto-restart输出短路保护LEDsShortAuto-restart7.20.8Supportmulti-lampparallelParalleloperationmodeatend-user,No-flickerReliabilityforparallelSupportmulti-lampparallelParalleloperationmodeatend-user,No-flickerReliabilityforparalleloperationmode,No-damagedRepeatablepeakcurrent dimmerxK>P_lampxN/Betterdimmingperformance,samedimminglevelforeachlampEachlampcangetaccuratephase-cutEachlampcangetbetterCCtoleranceat100%Supportmulti-UnacceptableifLEDisflickerwhenadjustothersolutionsupportmulti-gangasend-userDIMMERTYPE-XXXXX40W-MULTI LACN123231312LUMINS%613213123Supportmulti-UnacceptableifLEDisflickerwhenadjustothersolutionsupportmulti-gangasend-userDIMMERTYPE-XXXXX40W-MULTI LACN123231312LUMINS%613213123SmallSizeforGU103W-SmallSizeforGU103W-PowerfactorLowripplecurrentDimmablewithLeadingandtrailingedgedimmerSmallsizeforGU10andcandleHighEfficiency&Non-isolated_3W-Buck-HighEfficiency&Non-isolated_3W-Buck-ACNoPopularusedinwideworld1W-Popularusedinwideworld1W-DimmableandNon-dimmableIsolatedandNon-isolatedGeneralPFandHighPFDownLEDTubeWallTightLEDTightLEDCurrentTheValueofDigitalPowerDoTheValueofDigitalPowerDoitatPrimaryLowerCostConventionalPrimarySideCCww1 SampleOutputfilteringMethod1–peakvalueProblem–RingingaffectsoutputvoltagesamplingMethod2ConventionalPrimarySideCCww1 SampleOutputfilteringMethod1–peakvalueProblem–RingingaffectsoutputvoltagesamplingMethod2–sampleafterfixedfilteringtimetoremoveringingimpactsProblem–SensedvoltagevarieswithoutputiWattItisanadaptiveItactivelysearchesthebestlocation(beforetransformervoltagecollapse)iWattItisanadaptiveItactivelysearchesthebestlocation(beforetransformervoltagecollapse)tosenseoutputthevoltage.ItisdigitallyimplementediniW1688/89/92/90.AuxiliaryNottoTightConstantCurrentModeIpri_pkNps 2TsIIppri_pkNpsQ120VacIout的过程能样本N-标准差（整体+*Vss_pk_set_0.345TightConstantCurrentModeIpri_pkNps 2TsIIppri_pkNpsQ120VacIout的过程能样本N-标准差（整体+*Vss_pk_set_0.3450.3550.3600.365PPM合计 PPMLSL0.00PPMUSL0.00PPM合计PPMLSL0.00PPM>USLPPM<LSLPPM>USL0P合计TonDelayCompensation-OutputCurrentfswICompRL↓=>ΔISr↑=>ΔITonDelayCompensation-OutputCurrentfswICompRL↓=>ΔISr↑=>ΔITransformerLeakageThemodelinFig.TransformerLeakageThemodelinFig.1showsamodelofFlybackcircuitafterthemainswitchturnsoff.Thetransformerissimplifiedbyremovingtheisolationandrepresentingthesecondarysidevariablesontheprimaryside:thereflectedoutputvoltageisNVo;thereflectedsecondarycurrentisIsec/N.Withoutleakageinductance,theprimarypeakcurrentistransferredtothesecondarypeakcurrentbyturnratiowithoutanyloss:.However,withleakageinductance,thecurrentintheleakageinductancecannotchangetozerowithouttransitiontime.ThecurrenttransitionwaveformisshowninFig.2.ThetransitiontimeTtrcanbedeterminedfromtheclampingvoltageandthereflectedoutputvoltage.Becauseofthetransitiontime,thepeaksecondarycurrentIsecnotlongermatchestheprimarypeakcurrentbyturnratio:.Therefore,theoutputcurrentislowerthanidealvalue.Let’ssupposethepercentageofprimarypeakcurrentlossis5%,thenpercentageofoutputcurrentlossissimply5%.iWattPSRSolutionforNon-isolatedBulbThisiWattPSRSolutionforNon-isolatedBulbThisproductiscoveredbythefollowingTodetect/sensetheoutputvoltageindirectlythroughtheauxiliarywinding:6,370,039;;6,385,059;Todetect/sensetheoutputloadcurrentindirectlyandcontroltheoutputloadcurrentatconstant;andmaintainthetightconstant-currentregulationacrosswide974,107;7,589,983Input:Output:70V•••iWattDimmableSolutionforPARThisiWattDimmableSolutionforPARThisproductiscoveredbythefollowingTodetect/sensetheoutputvoltageindirectlythroughtheauxiliarywinding:6,370,039;;6,385,059;Todetect/sensetheoutputloadcurrentindirectlyandcontroltheoutputloadcurrentatconstant;andmaintainthetightconstant-currentregulationacrosswide974,107;7,880,447;7,589,983;Todimtheoutputcurrentandcorrectpowerfactor:7,433,211;7,936,132;••••••Output:25V400mAEfficiency>82%PF>0.9@No-dimmermodeTHDmeetIEC61000-3-2DimmingcompatibilityRCRiWattIPiWattisaUS-basedtechnologyiWattIPiWattisaUS-basedtechnologycompany,locatedinSiliconiWattisthecompanywhoinventedtheprimary-feedbackcontrolwithdigitalsolutions.Theclaimfordigitalprimaryfeedbackmeanstousethe1-bitcomparatortodetecttheiWattPatent-----IssuedU.S.PendingU.S.Non-ProvisionalApplicationsPendingU.S.ProvisionalApplicationsInventionDisclosures27LowCostLowCostLEDDriverSimpleSimpleNoRCDClampNeeded<3WduetoBJTslowSimpleEMILowCostNofeedback/regulationcomponentsatsecondarysideHighEfficiencybyiW1810–vslooseregulation800VswitchforhighVinsurgeNoY-(savesspaceiW1810–vslooseregulation800VswitchforhighVinsurgeNoY-(savesspaceandcostTypicalAC/DCBOM21No-LoadStandby<Average>iW1810VforsmallestiW1810VforsmallestOperationfrequency64KHz,driveSmallsizeapplication,EE10transformerHighefficiency,78%@230VacCCtolerance5%,withlineandloadingiW1678Non-isolatedfor1-6WLEDInput:180-iW1678Non-isolatedfor1-6WLEDInput:180-Efficiency:Operationfrequency64KHz,driveBJTEasyforwideinputapplicationHighefficiencysmallsize,lowPossibleforRC详细应用请参考iWattdemoForRC1-smallDCToForRC1-smallDCToiw1678-TightConstant-CurrentandHigh(ACinput180~264Vac,Output33LEDs)BestlineV-IV-outputHighWideoutputloading AC 20212223242526272829303132I-output34%#of%TightConstant-CurrentandHigh(ACinput180~264Vac,Output33LEDs)BestlineV-IV-outputHighWideoutputloading AC 20212223242526272829303132I-output34%#of%iW1678forCompactBulbLightiW1678forCompactBulbLight••••Operationfrequency64KHz,driveBJTHighefficiencySmallsize,lowLowripple100ViW1678forCompactBulbLightiW1678forCompactBulbLight•••••Input:90-260Vac EfficiencyRippleiW3620withSEPICforHi-PF•Input:90-iW3620withSEPICforHi-PF•Input:90-•Output:40V•PF>0.95,•Efficiency•RipplecurrentiWattLEDdriverNon-iWattDigitalPowerLEDLightingDriverSelectionUpto5-Upto5-UptoUptoUptoLow-powerLow-costValleyfillPSRCC/SinglestagePSRCC/PSRCC/Valleyfill/PSR