文档介绍：2009届本科毕业论文(设计)
论文题目:LED驱动电源的设计
学生姓名:
所在院系:机电学院
所学专业:应用电子技术教育
指导老师:
完成时间:2009 年5月20日
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
The design of LED drives power
ABSTRACT
For general lighting, people need more white light sources. As a new light source, LED with pollution-free, long-life, vibration and shock resistant to the distinct characteristics. At present, the luminous efficiency white LED is gradually improving, mercialization of the device has reached the level of the incandescent lamp, but the fact should not be overlooked that the LED lights and supporting the driver did not keep up with a timely manner, the drive circuit poor performance, fault Rate is high and promote the use of LED e the bottleneck, there are many technical issues need to study and solve.
This paper introduces a highly efficient lighting with LED drive the power. Red, green and blue colour of the design use separate drive circuit respectively, through the PWM mode to adjust the brightness LED lights to facilitate realization of the diversity of colors used to switch power supply, input voltage range widely, anti - Interference of the good, high-efficiency drive to ensure that the drive plate on different occasions in different regions, is normally available.
KeyWords: LED,Power ,Driver
目录
1 绪论 1
课题研究的背景 1
课题研究的方案 1
2 系统硬件电路设计 2
系统框图及工作原理简介 2
系统所用主要芯片介绍 3
PIC16F684功能介绍 3
L6562D功能介绍 9
HV9922功能介绍 10
系统硬件电路设计 11
AC-DC变换电路 11
DC-DC变换电路 12
微控制器及外围电路 12
四路驱动电路 14
输出过流保护电路 15
3 系统程序测试 16
项目实现功能 16
软件设计思路 16
汇编程序流程 16
4 总结 20
致谢 20
参考文献 21
附录 22
测试程序清单 24
1 绪论
课题研究的背景
白炽灯时代即将和我们告别了。整个20世纪,爱迪生发明的白炽灯经受住了时间的考验,成为标准的通用照明工具。但新的照明技术-尤其是发光二极管必将最终代替白炽灯