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1、870IEEETRANSACTIONSONPOWERELECTRONICS,VOL.20,NO.4,JULY2005ApplicationofNovelD2TControltoSingle-SwitchTwo-OutputSwitchingPowerConvertersSiu-ChungWong,Member,IEEE,andChiK.Tse,SeniorMember,IEEEAbstract—Anovelmethodforprogrammingcurrentindc/dcconvertersoperatingindiscontinuousconduct
2、ionmodeisde-scribedinthispaper.Thecontrolvariableistheproductofthesquareofthedutycyleandtheswitchingperiod,i.e.,2,whichisdirectlyproportionaltoinputandoutputcurrentsofadiscon-tinuous-modeconverter.Amethodofcontrolling2isappliedtoconvertersthatutilizeoneswitch(oronesetofsynchronou
3、sswitches)forachievingtwocontrolfunctions.Inparticularasingle-switchtwo-outputboostconverter,inwhichacontin-uous-modeconverterandadiscontinuous-modeconvertershareoneactiveswitch,isstudied.Inthissystem,current-modecontrolisusedtoregulatetheoutputvoltageofthecontinuous-modeconverte
4、randtheproposed2controlisusedtoregulatetheotherdiscontinuous-modeconverter.Theresultisagenericcurrent-modecontrolledtwo-outputconverter.IndexTerms—Current-modecontrol,dc/dcconverters,discon-tinuousconductionmode,doubleconverters.I.INTRODUCTIONHEDESIGNofmultiple-outputdcdcconverte
5、rsisoneofTtheoldproblemsstudiedinthe1980sand1990s[1][4].Recently,duetotheadvancesinintegratedcircuitcustomizationandthequestforversatileon-chipdcregulators,thecontrolandcircuitdesignofmultiple-outputdcdcconvertershavereceivedrenewedinterest[5],[6].Moreover,theemphasishasshiftedto
6、wardtheintegrabilityofthecontrolandpowercircuits.Thispaperrevisitstheproblemofcontrollingsingle-switchfully-regulated-two-outputdcdcconverters,andinparticulardescribesasingle-switchtwo-outputregulatorwhichcomprisestwoboostconverters,oneoperatingincontinuousconductionmode(CCM)andt
7、heotherindiscontinuousconductionmode(DCM)[1],[2].Thebasicprincipleofthesingle-switchtwo-Fig.1.(a)WaveformsoftheparabolicandrampgeneratorsintheconceptualoutputconvertertakesadvantageoftheinsensitivityoftheCCMDTcontrolschemeand(b)conceptualimplementation.Thecurrentsourceonconverter
8、toswitchingfrequencyandthegeneraldepende
