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1、職業(yè)技術(shù)學(xué)院畢業(yè)論文題目：照明LED驅(qū)動(dòng)電源的設(shè)計(jì)學(xué)生：XXX學(xué)號(hào)：XXX院（系）：職業(yè)技術(shù)學(xué)院專(zhuān)業(yè)：XXX指導(dǎo)教師：XXX200年月日I照明LED驅(qū)動(dòng)電源的設(shè)計(jì)摘要隨著電力電子技術(shù)的發(fā)展，LED由于環(huán)保、壽命長(zhǎng)、光電效率高等眾多優(yōu)點(diǎn)，近年來(lái)在各行業(yè)應(yīng)用得以快速發(fā)展，同時(shí)，由于近年來(lái)的開(kāi)關(guān)電源在電子電器各行業(yè)中占了非常重要的位置，由此驅(qū)動(dòng)LED的開(kāi)關(guān)電源就成了關(guān)注熱點(diǎn)。理論上，LED的使用壽命在10萬(wàn)小時(shí)以上，但在實(shí)際應(yīng)用過(guò)程中，由于驅(qū)動(dòng)電源的設(shè)計(jì)及驅(qū)動(dòng)方式選擇不當(dāng)，使LED極易損壞。我們?cè)O(shè)計(jì)LED驅(qū)動(dòng)電源時(shí)，有必要知道LED電流、電壓特性，由于LED的生產(chǎn)廠家及LED規(guī)格不同，
2、電流、電壓特性均有差異。因此對(duì)驅(qū)動(dòng)電源的設(shè)計(jì)提出了嚴(yán)格要求。根據(jù)LED電流、電壓變化特點(diǎn)，采用恒流驅(qū)動(dòng)方式，是比較理想的LED驅(qū)動(dòng)方式，它能避免LED正向電壓的改變而引起電流變動(dòng)，同時(shí)恒定的電流使LED的亮度穩(wěn)定。因此眾多廠家選用恒流方式驅(qū)動(dòng)LED，從而設(shè)計(jì)的開(kāi)關(guān)電源就需要一個(gè)能恒流的直流驅(qū)動(dòng)電源。傳統(tǒng)的開(kāi)關(guān)電源控制集成電路具有效率高、輸出穩(wěn)定、可靠性高，并可實(shí)現(xiàn)遠(yuǎn)程控制等功能。完全適合用來(lái)驅(qū)動(dòng)LED的開(kāi)關(guān)電源。本文主要通過(guò)設(shè)計(jì)一個(gè)恒流驅(qū)動(dòng)電源來(lái)驅(qū)動(dòng)LED。通過(guò)各種電力電子組件和電力電子電路組成一個(gè)恒流的電源，達(dá)到設(shè)計(jì)的要求。關(guān)鍵詞：LED驅(qū)動(dòng)電路,開(kāi)關(guān)電源，恒流IITheDes
3、ignofLEDLightingDrivePowerABSTRACTWiththepowerofthedevelopmentofelectronictechnology,LEDbecauseofenvironmental,longlife,highefficiencyphotoelectricmanyadvantages,Inrecentyearsinallsectorstorapidapplicationdevelopment,whileInrecentyears,theswitchingpowersupplyinelectricalandelectronicindustrie
4、saccountedforaveryimportantposition.ThisdrivestheLEDSwitchingPowerSupplyconcernshavebecomehotfocus.Theoretically,theservicelifeoftheLED100,000hoursormore,butinactualapplicationprocess,Asthepowersupplydesign-drivenapproachandapoorchoice,LEDeasilydamaged.WedesignedLEDdrivepower,itisnecessarytok
5、nowLEDcurrentandvoltagecharacteristics.SincetheLEDandLEDmanufacturersspecifications,currentandvoltagecharacteristicsaredifferent.Sorightdrivepoweronthedesignofthestrictrequirements.UndertheLEDcurrentandvoltagecharacteristics,constant-current-drivenapproachisidealLEDdriver,ItwouldavoidtheLEDfo
6、rwardvoltagechangescausedchangesinthecurrent,constantcurrentsothattheLEDbrightnessstability.SomanymanufacturersuseconstantcurrentmodeLEDdriver,thusthedesignofswitchingpowersupplywillneedaconstantcurrentoftheDCpowersupply.TraditionalSMPScontrolICwithhighefficiencyandoutputstability,highreliabi
7、lityandcanremotecontrol,andotherfunctions.WellsuitedtodrivetheLEDSwitchingPowerSupply.Thispapermainlythroughconstant-currentpowersupplycircuitdesigntotheLEDdriver.Throughavarietyofelectroniccomponentsandelectricalpowerelectroniccircuitscompos
