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1、杭州电子科技大学硕士学位论文ABSTRACTThisthesisistodesignakindofportablemobilepowersupply.Mobilepowerwasdesignedwhichcanrealizethedifferentoutputcircuit.Afterexperimentaltestthesystemprovetobesafeandreliable.Thesystemconsistsofchargingcircuit,20v,12v,5voutputcircuitandprotect
2、ioncircuit.Otherwiseitcandisplayhowmuchbatteryremains.Inordertoselecttheappropriatetopologystructureforthisdesign,adetailedanalysisaboutthetopologyofswitchpowersupplywasdone.ChipCN3705wasusedtorealizelithiumbatterychargingcircuit,whichcanbechargedbyadapterandus
3、egreencleaningofsolarcharging.Chargingstatecanbedividedintotwostageincludeconstantcurrentandconstantvoltage.Thechipcanprotectthecircuitverywell.ChipUC3843functionanddetailedintroducesontheexternalcircuitdesignwasanalyze.thecircuitrealizedthemaximumoutputpowerof
4、90w.Thispaperexpoundsthestep-downchipLM2576internalstructureandfunction,anddesignsastablestep-downmodule.MCUPIC16F616ofcircuitcanrealizethefunctionofprotection,powerdisplay,prolongtheservicelifeofthebatteryandincreasethesafetyofthecircuit.Thepaperintroducesinde
5、tailthedesignofthehigh-frequencyinductors,listssomecommonmagneticcorematerial,andanalyzesitsadvantagesanddisadvantages.Meanwhileitalsoanalyzestheworkinthedesignofthehighfrequencyinductivepattern,derivesthecalculationoftheinductance,andcalculatesthewirediameter.
6、FinallyschematicdiagramwasdesignedandthenPCBdesignwascarriedout.Alotofexperimentaltestwasdonewhichrelatestotemperatureandefficiency.Thisthesiscanusethesolarchargeinoutdoor.Meanwhilethecarpowerchargeandcommercialpowerchargecanbeused,whichisthemajorcharacteristic
7、.Comparedwiththetraditional10wto20woutputpowerofmobilepowersupply,thedesignofthepoweroutputisupto90w,whichcanprovidepowertohighpowerelectronicsproductssuchasnotebookcomputer.ithasthreeoutputinterface,namely5v,12v,20vthree-wayvoltageoutput,whichcanmeetpeople’sne
8、edswithdifferentelectricalcharge.Keywords:mobilepowersupply,compositecharging,UC3843,CN3705II万方数据杭州电子科技大学硕士学位论文目录摘要..........................................................
