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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,5voutputcircuitandprotectioncircuit.Otherwiseitcandisplayhowm
2、uchbatteryremains.Inordertoselecttheappropriatetopologystructureforthisdesign,adetailedanalysisaboutthetopologyofswitchpowersupplywasdone.ChipCN3705wasusedtorealizelithiumbatterychargingcircuit,whichcanbechargedbyadapterandusegreencleaningofsolarcharging.Chargingstatecanbedividedintotwostageinclu
3、deconstantcurrentandconstantvoltage.Thechipcanprotectthecircuitverywell.ChipUC3843functionanddetailedintroducesontheexternalcircuitdesignwasanalyze.thecircuitrealizedthemaximumoutputpowerof90w.Thispaperexpoundsthestep-downchipLM2576internalstructureandfunction,anddesignsastablestep-downmodule.MCU
4、PIC16F616ofcircuitcanrealizethefunctionofprotection,powerdisplay,prolongtheservicelifeofthebatteryandincreasethesafetyofthecircuit.Thepaperintroducesindetailthedesignofthehigh-frequencyinductors,listssomecommonmagneticcorematerial,andanalyzesitsadvantagesanddisadvantages.Meanwhileitalsoanalyzesth
5、eworkinthedesignofthehighfrequencyinductivepattern,derivesthecalculationoftheinductance,andcalculatesthewirediameter.FinallyschematicdiagramwasdesignedandthenPCBdesignwascarriedout.Alotofexperimentaltestwasdonewhichrelatestotemperatureandefficiency.Thisthesiscanusethesolarchargeinoutdoor.Meanwhil
6、ethecarpowerchargeandcommercialpowerchargecanbeused,whichisthemajorcharacteristic.Comparedwiththetraditional10wto20woutputpowerofmobilepowersupply,thedesignofthepoweroutputisupto90w,whichcanprovidepowertohighpowerelectronicsproductssuchasnotebookcomputer.ithasthreeoutputinterface,namely5v,12v,20v
7、three-wayvoltageoutput,whichcanmeetpeople’sneedswithdifferentelectricalcharge.Keywords:mobilepowersupply,solarbatterycharging,UC3843,CN3705II万方数据杭州电子科技大学硕士学位论文目录摘要.......................................................
