Single-Cycle Control” Technique

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1、“Single-CycleControl”TechniquesetsnewIndustryStandardforContinuousConductionModePFCControllersFrankAthari,RonBrown,StephenOliverInternationalRectifier,ElSegundo,USA.aspresentedatPCIMEurope03Abstract–Thispaperpresentsanovelapproachforcontrolofhighperformanc

2、eBoostPowerFactorCorrection(PFC)circuitsoperatingatafixedfrequencyinthecontinuousconductionmode.Thecomplexmultiplierandinputlinevoltagesensingcircuitsrequiredwithtraditionalcontrolmethodsareeliminatedwiththeproprietary"Single-CycleControl"(SCC)methodwheret

3、heyarereplacedwithanintegrationresettechnique.Thebenefitsofoverallsystemrobustness,improvedtransientperformance,andsimplicityarecomplementedbya75%reductioninpcbspaceandcomponentcount.I.INTRODUCTIONhigherperformanceoftheCCMtopologywiththePowerFactorCorrecti

4、on(PFC)andharmoniccurrentsystemcostbenefitstypicallyassociatedwithDCMreductionarefastbecomingstandardrequirementsinPFC.mostpowersupplydesignstoday.ThecompellingenvironmentalandeconomicbenefitsresultingfromSimplemathematicalderivationswillprovidecleartheuse

5、ofPowerFactorCorrectioninpowersuppliesinsightintothetheoryoftheconcept.ThetheorywillhasencouragedgoverningbodiesandendcustomersthenbesubstantiatedbylabresultsfrombothatodemandmorewidespreaduseofPFCcircuitsdiscretecontrollerandthefirstprototypesiliconacross

6、amuchbroaderspectrumofpowerlevelsandversionofthecontroller.productlinesthaneverbefore.Aclosecomparisonofthe“SingleCycleControl”ThisisnotparticularlygoodnewsforPowerSupplytechniquevs.theexistingmainstreamsolutionwillmanufacturersgiventhatthecostandcomplexit

7、yofalsodemonstratethedramaticbenefitsincosthighperformancePFCcircuitshavenotchangedreduction,componentcountreduction,boardspacedrasticallysincetheintroductionofthefirstsavingsandreduceddesigneffortandcomplexity.commerciallyavailableContinuousConductionMode

8、(CCM)PFCcontrollers.Infact,tothisday,theFinallyadiscussionforpotentialSCCproductswillbemainstreamcontrollersusedinsinglephaseboostpresented.(CCM)PFCcircuitsstillusethesameschemedevelopedmanyyearsago.Atlowerpo