高昌星-LED驱动电源的设计-.doc

PAGEIIPAGEI河南科技学院2009届本科毕业论文〔制定〕论文题目：LED驱动电源的制定同学姓名：高昌星所在院系：机电学院所学专业：应用电子技术教育指导老师：仝祥云完成时间：2009年5月20日摘要关于一般照明而言，人们更需要白色的光源。作为一种新型的光源，LED具有无污染、长寿命、耐震动和抗冲击的鲜亮特点。虽然白光LED的发光效率正在逐步提升，但是与LED灯配套的驱动器性能不佳，故障率高，成了LED推广应用的瓶颈。本文介绍了一种照明用LED高效驱动电源的制定方法。本制定的红、绿、蓝三色各自采纳单独的驱动电路，通过脉宽调制方式来调节LED灯的亮度，便于实现颜色的多样化；采纳开关电源供电方式，输入电压范围广、抗干扰性好、驱动效率高，确保了该驱动板在不同场合、不同区域内都能正常使用。关键词：LED，电源，驱动ThedesignofLEDdrivespowerABSTRACTForgenerallighting,peopleneedmorewhitelightsources.Asanewlightsource,LEDwithpollution-free,long-life,vibrationandshockresistanttothedistinctcharacteristics.Atpresent,theluminousefficiencywhiteLEDisgraduallyimproving,thecommercializationofthedevicehasreachedtheleveloftheincandescentlamp,butthefactshouldnotbeoverlookedthattheLEDlightsandsupportingthedriverdidnotkeepupwithatimelymanner,thedrivecircuitpoorperformance,faultRateishighandpromotetheuseofLEDbecomethebottleneck,therearemanytechnicalissuesneedtostudyandsolve.ThispaperintroducesahighlyefficientlightingwithLEDdrivethepower.Red,greenandbluecolourofthedesignuseseparatedrivecircuitrespectively,throughthePWMmodetoadjustthebrightnessLEDlightstofacilitaterealizationofthediversityofcolorsusedtoswitchpowersupply,inputvoltagerangewidely,anti-Interferenceofthegood,high-efficiencydrivetoensurethatthedriveplateondifferentoccasionsindifferentregions,isnormallyavailable.KeyWords：LED，Power，Driver目录TOC\o"1-3"\h\z\uHYPERLINK\l"_Toc231103547"1绪论PAGEREF_Toc231103547\h1HYPERLINK\l"_Toc231103548"1.1课题研究的背景PAGEREF_Toc231103548\h1HYPERLINK\l"_Toc231103549"1.2课题研究的方案PAGEREF_Toc231103549\h1HYPERLINK\l"_Toc231103550"2系统硬件电路制定PAGEREF_Toc231103550\h2HYPERLINK\l"_Toc231103551"2.1系统框图及工作原理简介PAGEREF_Toc231103551\h2HYPERLINK\l"_Toc231103552"2.2系统所用主要芯片介绍PAGEREF_Toc231103552\h3HYPERLINK\l"_Toc231103553"2.2.1PIC16F684功能介绍PAGEREF_Toc231103553\h3HYPERLINK\l"_Toc231103554"2.2.2L6562D功能介绍PAGEREF_Toc231103554\h9HYPERLINK\l"_Toc231103555"2.2.3HV9922功能介绍PAGEREF_Toc231103555\h10HYPERLINK\l"_Toc231103556"2