低噪聲大電流LED電荷泵DC-DC芯片的設(shè)計.pdf

1、西安電子科技大學(xué)碩士學(xué)位論文低噪聲大電流LED電荷泵DCDC芯片的設(shè)計姓名：李宏濤申請學(xué)位級別：碩士專業(yè)：微電子學(xué)與固體電子學(xué)指導(dǎo)教師：來新泉20070101AbstractAbstractThispaperisbasedontheproject“TheoreticalresearchanddesignofkeytechniquefordeepsubmicronpowermanagementIC”andmainlydealswithth

2、edesignoflownoiseandhi曲currentLEDchargepumpDC／DCconverterACMOSchargepumpswitchingvoltageconvct“tsrIC，namedXDJ6316，isdescribeddetaillyincludingdefinitionoftheICspecificationfnllllel“analysisoftheelectricalcharacteristics，

3、andimplementofsubsystemcircuitsandsimulationofthewholechipThebasicprinciplesofchargepumpDC／DCconverterwhichisthetheoryguidanceofthedesignandtheimplementationofXDJ6316havebeenanalyzedandstudiedinthispaperThechipincludesac

4、urrent自DnrcecapableofdrivingloadsLEDupto1Afroma29Vto44VinputIndependentlowandhi曲currentsettingsareprogrammedbytwoexternalprogrammingresistorsShutdownmodeandcurrentoutputlevelsareselectedviatwocontrol109icinputsItwillauto

5、maticallyswitchfromlxmodeto15xmode，andsubsequentlyfrom15xmodeto2xmodewheneveradropoutconditionisdetectedThemainswitcheswillconnectsupplyinputwithoutputinlxmodeuntiltheoutputvoltagehasdecayedtolessthanorequaltothevoltagea

6、tthesupplyinputInadditionlotsofprotectioncircuitsareintegratedinthechip，suchasthermalprotectionsoft—startovercurrentshutdownandSOonThechipisanovdanalogICbasedonthe061上lnstandardprocessAllsimulationshavebeencompletedunder

7、varioussupplyvoltagesandoperatingtemperaturesbyusingtheEDAsoftware，suchasWorkviewandHspiceTheresultsofsimulationsindicatethatthefunctionofXDJ6316isexcellentwitha4％LEDcurrentprogrammingaccuracyaswellaslx，15xand2xoutputvol