资源描述：
《VA高效率开关电源开发.pdf》由会员上传分享，免费在线阅读，更多相关内容在工程资料-天天文库。
1、InvestigationoftheHighPowerInvestigationoftheHighPower--DensityDensityACAC--DCFrontDCFront--EndConverterEndConverterChuanyunWang,BingLu,YueChang,MingXu,FredC.LeePreparedfor3YPreparedfor3Y--PowerTechnologyPowerTechnology3yPowerQuarterlyReview1Front-EndConverterSpecificationsIntermediateBusACInpu
2、t400VOutput12VPFCPFCDC/DCDC/DCBus∑InputVoltage90~260Vacsinglephase∑Outputvoltage12VDC∑Outputpower1200W∑Efficiency>89%at230Vac,fullload∑Powerfactor>0.98∑Hold-uptime20ms∑Profile1U3yPowerQuarterlyReview2ChallengesandGoalsChallenges:Highpower-density,highefficiency∑Shorttermgoal:Design,buildandtest
3、ahighpowerdensity1U1.2kWfront-endconverterfortheserverapplication¾Powerdensity:>13.9W/inch3(Size:1.6”x4.75”x11.35”)¾Efficiency:>89%¾Node-rating3yPowerQuarterlyReview3OutlinePartI.PFCStage∑Finaldesign∑ExperimentalresultsPartII.DC-DCStage∑Finaldesign∑Experimentalresults¾Measuredefficiencycurve¾Ho
4、ld-uptimetest3yPowerQuarterlyReview4PartI.PartI.PFCStagePFCStage3yPowerQuarterlyReview5CoolMOS+LosslessSnubberPFCisChosenStItmtIsVDStItDoLoadItDaItinT0T1T3T5T0T2T4T6¾UseCoolMOStoreduceconductionlossandturnoffloss¾Usecurrentsteeringconcepttoreducereverserecoveryandturnonloss¾Losslesssnubbertorec
5、overtheleakageinductorenergy3yPowerQuarterlyReview6PFCCircuitDesign∑140kHzswitchingfrequency∑90~270Vac∑1200WforDC-DCoutput¾OnemoreTO-220componentLoad¾TwomorewindingsSTwoInfineonCoolMOS60R99inparallel,TO-247Do,DaSidiode,commoncathodpackage,ISL9K860P3,TO-220Da1,Da2Sidiode,serialconnectionpackage,
6、FEP16JTD,TO-220DiodebridgeShindengen,D25XB60CoTwo220uFelectrolyticcap+50nFceramiccapCc50nF(100V)ceramiccapInductorTwo77083core,AWG#143yPowerQuarterlyReview7BoostInductorDesign@140kHz77083-A777083-A7∑ForN1windingAWG#14wireisused∑ForN2andN3windingLitzwireisused*[Ref]Zhao,Q.;Tao,F.;Lee,F.C.;Xu,P.;
7、Wei,J.;IEEE20013yPowerQuarterlyReview8PFCStageHardware1stVersion2ndVersionVoltageandcurrentstressreductioninsingle-stagepowerfactorcorrectionAC-DCconverterswithbulkcapacitorvoltagefeedback.pdf3yPower9DiodeReverseRecoveryIIN3N2DNat
