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1、毕业设计（论文）中英文文献题目主板开关电源的设计与检测专业名称班级学号学生姓名指导教师年月日THEDEVELOPMENTOFSWITCHINGPOWERAtpresent,switchingpowersupplytosmall,lightweightandhighefficiencycharacteristicsarewidelyusedinavarietyofcomputer-drivendevices,communicationsequipment,etc,Almostalltheelectronicequipm
2、entistherapiddevelopmentoftoday’selectronicinformationindustry,anindispensablePowerSource.Currentlyonthemarkettheuseofswitchingpowerbipolartransistorsmadeof100khz,500khzwithapowerMOSFETmade,Althoughpractical,itsfrequencyneedstobeimproved.Theswitchinglosses,itne
3、edshigh-speedswitchingcomputers.However,theswitchingspeedoftheincreasewillbedistributedbythecircuitinductanceandcapacitance,ordiodestoredchargeofthegeneratedsurgeornoise.Thiswillnotonlyaffectnearbyelectronicequipment,willgreatlyreducethereliabilityofpowersupply
4、itself.Which,withtheswitchtopreventKai-closedbythevoltagesurgeoccurs,canuseRCorLCbuffer,whilethestoredchargefromthediodecanbeusedduetocurrentsurgessuchascoremadeofamorphousmagneticbuffer.Atypicalapplicationofapowersupplyunit(PSU)isconvertutilityACvoltageintoreg
5、ulatedDCvoltagerequiredforelectronicequipment.NowadaysinPSUtheenergyflowiscontrolledwithsemiconductorsthatarecontinuouslyswitchingonanoffwithhighfrequency.SuchdevicesarereferredtoasswitchmodepowersuppliesorSMPS.Theyoffergreaterefficiencycomparedwithlinearsuppli
6、esbecauseaswitchcancontrolenergyflowwithlowlosses:whenaswitchisoff,itblockstheflowofvoltageandcurrent,canberelativelylowinbothstates.SMPSarealsosmallerinsizeandlighterinweightduetothereducedsizeofpassivecomponentsandlowerheatgeneration.Theindustrytendedtowardmi
7、niaturization,advancementsinsemiconductortechnology,aswellasvariousenergyefficiencyregulationshavemade"switch"thedominanttypeofPSRacrosspracticallythefullspectrumofapplications.MostoftheswitchersmanufacturedtodayforACinputapplicationsincludeaPFCfrontend.Powersu
8、ppliesinthemid–70’s.WeidentifiedtheseasSWITCHMODEproducts.AswitchingpowersupplydesignedusingONSemiconductorcomponentscanrightfullybecalledaSWITCHMODEpowersupplyorSMPS.Ingene
