1MHz Multi-Resonant Push-Pull 48V VRM

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1、1MHzMulti-ResonantPush-Pull48VVRMMaoYe,MingXuandFredC.LeeCenterforPowerElectronicsSystemsTheBradleyDepartmentofElectricalandComputerEngineeringVirginiaPolytechnicInstituteandStateUniversityBlacksburg,VA24061USAAbstract—Forfuturehigh-endserverandworkstationworkingtogetherinonemotherboard.Sothepow

2、erlevelinapplications,itwillbeimpracticalforvoltageregulatormodulessuchcasesishigh.Asanalternative,distributedpowersystems(VRMs)todrawpowerfromthe12Voutputofthesilverbox(DPSs)withvoltagebusesof48Vmaybemorepracticalforbecausethevoltagebuswillbetoolowtodelivertheincreasingfuturecomputersystems,suc

3、hasserversandhigh-endhighlevelsofpower.Therefore,distributedpowersystems(DPSs)workstations.Comparedtothelow-voltagebusDPS,thewithbusesof48Vwillbemorefeasiblesolutionsforfuturehigh-voltagebusDPSiseasytouse.Theconductionlossofthehigh-endcomputers.Thispaperpresentsanovelmulti-resonanthigh-voltagebu

4、sDPSislower,andthedistributedbusiseasytopush-pull(MRPP)topologyfor48VVRMs,basedonmethodsfordesign.Inahigh-voltageDPSthetransientresponseoftheloadreducingtheconductionlossandeliminatingthebodydiodehaslesseffectonthebusvoltage,andthenlesseffectontheconductionandreverse-recoverylossesofthesynchrono

5、usotherloads.Theinputfiltersizeofthehigh-voltage-inputVRMsrectifier.Two48V-1.2V70Aprototypesarebuilt,andtheircanbereducedsignificantly[1].Anothermeritof48V-inputefficiencyis86%at1MHz.VRMsisthatbecausetransformersareused,thedutycyclecanKeywords-VRM,DC-DCtransformer,multi-resonantconverter.beoptim

6、izedforefficiency,ripple-cancelingeffectandtransientbyadjustingtheturnsratio.I.INTRODUCTIONThispaperfocusesprimarilyonanovelmulti-resonantpush-pull(MRPP)topologyfor48VVRMsbasedonmethodsInthelastdecade,thecomputerindustry’sdevelopmenthasforreducingconductionlossandeliminatingbodydiodebeendramatic

7、.Thespeedandintegrationdensityofconductionandreverse-recoverylossesofthesynchronousmicroprocessorshaveincreasedrapidly.Nowtheprocessorrectifier.Two48V-1.2V70Aprototypesarebuilt,andtheirworkswithclockfrequenciesinthe2~3GHzran