1.6mhz同步整流dcdc降壓轉(zhuǎn)換器設(shè)計(jì)

1、東南大學(xué)碩士學(xué)位論文1.6MHz同步整流DCDC降壓轉(zhuǎn)換器設(shè)計(jì)姓名：郭婷申請學(xué)位級別：碩士專業(yè)：軟件工程（IC）指導(dǎo)教師：李智群劉桂芝20071201AbstractAbstractWiththedevelopmentofelectrontechnology，theintegratedswitchingpowersupplieshavebeenwidelyusedincommunicationsystems，computers，andc

2、onsumerelectronicsetcThemaintfendsofthepowermanagerICare“highefficiency、higllreliability、lowpower、lownoise、highPSRRandmodularization”，SOitneedstousenewtechniquesandimprovetheperformanceofachipdaybydayThisthesisfirstlyset

3、sforththetheoryofDCDCconvertersecondlydiscussestheworkingmodesofDCDCconverteLvoltagemodecontrol、Currentmodecontrol、PWMmodecontrol，andPFMmodecontr01Basedonthis，weintroducesynchronoustechnologyinthisdissertationinordertoim

4、provetheconversionefficiencyfocusingonhowtorealizeafixedfrequencysynchronousDCDCbuckconverterWehavedonemuchworkaboutthekeycellcircuits，suchasreferenceandbiasgeneratingcircuit，OSC，EA，slopecompensationcircuit，PWMcomparator

5、etcwhichhavebeendesignedandcalculatedpreciselyWe’veemulatedandoptimizedthecircuitsandaccomplishedthelayoutdesignbasingonCSMC0靴mCMOStechniquesAccordingtoCadenceSpectresimulationresults，thesystemoperatesstablywithlessthan1

6、4mVrippleand96％highefficiency，achievedthedesigntargetsTheinternalsynchronousswitchincreasesefficiencyandeliminatestheneedforanexternalSchottkydiode16MHzhi【ghswitchingfrequencyallowstheuseofsmallsurfacemountinductorsandca

7、pacitorsThischipwillbewidelyusedincellulartelephones，MP3players，digitalstillcameras，portableinstrumentsandSOonKeywords：Switchingpowersupplies，Voltagemodecontrol，Currentmodecontrol，PWM，BuckconverterConversionefficiency，Sy