一種寬輸入范圍的大功率LED驅(qū)動(dòng)電路的研究與設(shè)計(jì).pdf

1、天津大學(xué)碩士學(xué)位論文一種寬輸入范圍的大功率LED驅(qū)動(dòng)電路的研究與設(shè)計(jì)姓名：李飛申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：微電子學(xué)與固體電子學(xué)指導(dǎo)教師：肖謐201006ABSTRACTHighpowerLEDhaVetheadVantageofthehighlightef詫ctandhighcunentexceptthecommonLEDcharacteriSticsofenergysaVing，10nglifespan，enVironmentalprot

2、ectionandhighreliabili夠1tmakes“GreenLighting”applytoStreetlamp，行咖entlightingandcarlampmorewiderTheincreaseoftheLEDpowerhaVehi曲errequirementforthedriVecurrentofthedriVerchip鋤dthestabilityoftheoutputcurrentAtypeofwideinpu『

3、tlangehighpowerLEDdriVerchip、)I，暑LsdesignedinthisthesisIthasinputVohagefrom8Vt030V粕dlAmaximaloutputcurrentItcandirVerhighpowerLEDaboVe10inasinglelineItoperatingfrequencycouldbemodulatedonthechip，andmaximalfkquencyis135Mi

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5、sandresearchedthreekindsofmodulationandcuncntfeedbackmodeandVoltagefeedbackmode’I’hesecond，thewholechip’sst】rLlcturcwasconSt】mctedThischipfocusesonVoltagefeedbackmodeandconstantoutputcurrentcontrolofBooSt鋤rIlctureLater，t

6、histhesisanalyzesinparticularmainsubcircuits，suchasbandgapcircuit，LDegulationcircuit，soR—startcircuitthatmakeuseofDAcontrolmode，dimmingcircuit卸dosccircuitandoperatingfrequencyregulationcircuitWhat’smore，thesimulationresu

7、ltswereshowedafbereVeUsubcircuitThelast，thisthesisshowsandanaIysesthesimuIationresultsandthelayoutdesignofthe、VholechipsystemThewholechipsystemwassimulatedinspectreWheninputVoltagewas8V，outputmaximalcurrcntwas1A，andoutpu