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1、大功率LED驅(qū)動(dòng)電源研究摘要大功率LED以其高效、節(jié)能、環(huán)保、壽命長、可靠性高等優(yōu)點(diǎn)正在逐漸取代傳統(tǒng)的白熾燈、熒光燈成為新一代照明光源。隨著大功率照明LED性能的提高及生產(chǎn)成本的降低，其應(yīng)用領(lǐng)域正由屏幕背光源以及一些對亮度要求不高的景觀照明領(lǐng)域向普通白光照明領(lǐng)域擴(kuò)展。與此同時(shí)，與功率型LED配套的驅(qū)動(dòng)集成電路的研發(fā)也由于功率型LED逐漸得到廣泛的應(yīng)用而迅速的發(fā)展。本文結(jié)合大功率LED的特性及對現(xiàn)有驅(qū)動(dòng)電路的分析比較，研究制定基于恒流驅(qū)動(dòng)方式的大功率LED驅(qū)動(dòng)電源設(shè)計(jì)方法。根據(jù)現(xiàn)有大功率LED路燈的功率資料，提出了大功率LED路燈的設(shè)計(jì)方案，并設(shè)計(jì)出相應(yīng)的驅(qū)動(dòng)電路。該驅(qū)動(dòng)電路配
2、有線性調(diào)光功能，可根據(jù)需要，對外部部件參數(shù)進(jìn)行修改，達(dá)到調(diào)光的功能，并可根據(jù)外部電路的變化，驅(qū)動(dòng)不同功率的路燈，實(shí)現(xiàn)了驅(qū)動(dòng)電路的多功能性，使用簡單、方便。目前，大功率LED照明技術(shù)日趨成熟，大功率LED光源功效已經(jīng)達(dá)到100lm/W以上，這使得城市路燈照明節(jié)能改造成為可能。LED路燈，特別是大功率LED路燈，正以迅猛的速度沖擊傳統(tǒng)的路燈市場。而相對大功率LED路燈應(yīng)用中的驅(qū)動(dòng)電路也正如雨后春筍般萌發(fā)。關(guān)鍵詞 大功率LED；道路照明；驅(qū)動(dòng)電源-II---High-PowerLEDDriverPowerResearchAbstractThehighefficiencyLEDlig
3、htingisgraduallyreplacingincandescentandfluorescentlightingduetoitsuniqueattributessuchashighefficiency,lowenergyconsumption,lowpollution,longlifeandhighreliability.AsthequalityofpowerLEDimprovesandthecostofpowerLEDreduces,itsapplicationfieldhasgraduallyturnedfromsignallightinganddisplaylig
4、htingtogeneralroomlighting.AlongwiththedevelopmentofpowerLED,theresearchofitsdrivingIChasalsobeengreatlyaccelerated.ThisarticleunifiesthecharacteristicofLEDandtheexistingdrivingcircuit'sanalyticalstudy,summarizesthatusesconstantcurrentdrivetypedrivehighefficiencyLEDisthemostidealway.Accordi
5、ngtotheexistingdataofhighefficiencyLEDStreetlight'spower,proposedthehighefficiencyLEDstreetlight'sdesignproposal,anddesignsthecorrespondingdrivingcircuit.Thisdrivingcircuithasthelineardimmingfunction,whichcanbetoregulateanexternalresistortoachievedimmingfunction,mayaccordingtotheneed,adjust
6、anexteriorresistance,achievesdimmingfunction,andaccordingtotheexteriorelectriccircuit'schange,drivingdifferentpowerstreetlight,realizeddrivingcircuit'smulti-purpose,theusehasbeensimpleandconvenient.Atpresent，thehighefficiencyLEDlightingtechniquesaredaybydaymature,high-powerLEDlightsourcehas
7、reachedtheefficacyof100lm/Wormore,whichmakesenergy-savingcitystreetlightingpossible.LEDstreetlamps,especiallyhigh-powerLEDstreetlamps,istherapidspeedoftheimpactofthetraditionalstreetmarket.Andrelativelyhigh-powerLEDstreetlightingapplications,asthedriveci
