开关电源PWM比较器的研究与设计

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1、西南交通大学硕士学位论文开关电源PWM比较器的研究与设计姓名：朱志甫申请学位级别：硕士专业：微电子学与固体电子学指导教师：白天蕊20080501西南交通大学硕士研究生学位论文第1I页ABSTRACTAsacoreofthepowermanagementchip，PWMcomparatormusthavehighgain，suitablebandwidthandsmalloffsetvoltage．Atthesametime，itmusthavealowpowerdissipationandashortrespon

2、setime．So，thekeyofdesigningthiskindofcomparatoriskeepingatradeoffamongallparametersofit．BasedontheanalysisandcomparisonofmodulationandcontrolmodesofPWMSMPS(SWITCHED-MODEPOWERSUPPLY)，ahighperformancePWMcomparatorappliedinDC-DCSMPSpowermanagementispresented．Thi

3、snovelPWMcomparatorissimpleinstructure，highgain，smalloffsetvoltageandresponsetimeandlowpower．Inthefirstchapter,thepapermainlyintroducedthePWMSMPSofdevelopment，backgroundpaperstopicsanditstobedone．Inthesecondchapterofthispape，weanalysistheprincipleofPWM，drawth

4、eequivalentSPCIEmodel，andgivesthenetlistandthesimulationresults．AndanalysisthePWMSMPScontrolprinciple．Inthe3rdchapter,weanalysisPWMcomparatoroftheparamentersandPerformances，andenumeratesomekindsofcomparatorandanalysistheircircuitprinciple．Fromthebeginningofth

5、efourthchapter,accordingtocomparatortheperformanceofthedesignindicators，andweareusedofthebasicCMOSanalogcircuitsandanalysisthispaperappliestotheSMPSPWMcomparatorinthevariousmodules．AndtheallcircuitsofPWMcomparatoriSbedrawed．Inthefifthchapterofthispaper，wegive

6、thesimulationresultsindetailinShangHuaO．5umCMOStechnologiesthroughCADENCESPECTRESoftware．SimulationresultsshowsthattherequiredfunctionofPWMcomparatorhaveberealizedandreachedouraim．Wehasgotaresultthatthegainis104．4dB，thebandwidthis145KHzin一3dBgain，theoffsetvol

7、tageis444uv,theariseresponsetimeiS99ns．thedownresponsetimeiS60ns，andthepowerdissipationis530uW．ThenwegettheadvantagesandshortcomingsofourPWMcomparatorbycomparedwithothercomparators．Finally,inconclusionwepointoutthemeaningandshortagesofthisdesignand西南交通大学硕士研究生

8、学位论文第1II页someworksuchasLAYOUTneedingtodoinfuture．KeyWords：SMPS，PWMcomparator,gain，offset，responsetime西南交通大学学位论文版权使用授权书本学位论文作者完全了解学校有关保留、使用学位论文的规定，同意学校保留并向国家有关部门或机构送交论文的复印件和电子版，允许论文被查阅和借阅。