LED驱动电源的设计毕业论文.doc

本科毕业论文（设计）论文题目：LED驱动电源的设计学生姓名：所在院系：所学专业：应用电子技术教育指导老师：完成时间：LED驱动电源的设计摘要对于一般照明而言，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明特点。虽然白光LED的发光效率正在逐步提高，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高效驱动电源的设计方法。本设计的红、绿、蓝三色各自采用单独的驱动电路，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；采用开关电源供电方式，输入电压范围广、抗干扰性好、驱动效率高，保证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1绪论.11.1课题研究的背景.11.2课题研究的方案.12系统硬件电路设计.22.1系统框图及工作原理简介.22.2系统所用主要芯片介绍.32.2.1PIC16F684功能介绍.32.2.2L6562D功能介绍.92.2.3HV9922功能介绍.102.3系统硬件电路设计.112.3.1AC-DC变换电路.112.3.2DC-DC变换电路.122.3.3微控制器及外围电路.122.3.4四路驱动电路.142.3.5输出过流保护电路.