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1、IEEETRANSACTIONSONPOWERELECTRONICS,VOL.29,NO.4,APRIL20142109ACommunicationProtocolWithDataCompressionforIsolatedDigitalPowerSuppliesZhiyuanHu,StudentMember,IEEE,Yan-FeiLiu,Fellow,IEEE,TetYeap,Member,IEEE,andLushengGeAbstract—High-costisolatorsandtheirspeedlimitsa
2、retheisolationbarriertocompletetheclosed-loopcontrol.Second,shortcomingsofdigitalcontrolinisolatedpowersupplies.Dif-theprimary-sidemonitoringinformation,suchasinputunder-ferentfeedbackschemesresultindifferentnumbersandspeedvoltage,over-voltage,over-currentandbrow
3、noutalarms,aswellrequirementsoftheisolators,whichimpactthecostandthedeci-asPFCandfusestatusesneedstobecommunicatedtothesionmaking.Thispapercomparesexistingsolutions,andproposesacommunicationsolutionfeaturingdatacompressionandtime-secondary-sidemicroprocessor.Thir
4、d,turn-on/offsignalsneeddivisionmultiplexing,whichprovidesthehighestoutputaccuracytobesentfromthesecondarysidetotheprimaryside.Fourth,andmanyadvancedfeaturesofdigitalcontrol,whereasthecostthefeedbacksignalsoftheisolatedauxiliarypowersuppliescanpotentiallybeinther
5、angeofconventionalanalogsolutions.needtobetransmittedacrosstheisolationbarrieraswell.IntheIndexTerms—Datacommunication,datacompression,isola-analogera,allofthesesignalsrequireseparateisolators,andtors,protocols,switched-modepowersupplies.takeafairamountboardspace
6、.Inthedigitalera,digitalsignalprocessors(DSPs)areusedaspowercontrollers.SinceDSPscanprocessdata,amultiplexedI.INTRODUCTIONdigitalcommunicationschemewillintegratealltheaforemen-IGITALLYcontrolledfront-endpowerconvertersaretionedsignalsintoonedatabus,thussavesubsta
7、ntialboardDgainingpopularityinrecentyears.Manyleadingpowerspace,chippin-outs,andpotentially,cost.Advancedcontrolsupplymanufacturershaveintroducedfulldigitalcontrolledtechniques,e.g.reconfiguringparameterson-the-fly,arealsofront-endpowermodulesaphrasetoindicatetheus
8、eofdigi-madepossiblebysuchacommunicationbus.Forabovereasons,talcontrolinsteadofdigitallycontrolledanalogcontrol[1][5].thispaperisdedicatedtoamultiplexeddatacom
