1、 本科毕业论文(设计)本科毕业论文(设计) 论文题目:论文题目:LED 驱动电源的设计驱动电源的设计 学生姓名:学生姓名: 所在院系:所在院系: 所学专业:应用电子技术教育所学专业:应用电子技术教育 指导老师:指导老师: 完成时间:完成时间: LED 驱动电源的设计驱动电源的设计 摘摘 要要 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
2、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
3、 shock resistant to the distinct characteristics. At present, the luminous efficiency white LED is gradually improving, the commercialization 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
4、 up with a timely manner, the drive circuit poor performance, fault Rate is high and promote the use of LED become 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 de
5、sign 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 o
6、n different occasions in different regions, is normally available. KeyWords: LED,Power ,Driver 目目 录录 1 绪论绪论 1 1.1 课题研究的背景. 1 1.2 课题研究的方案. 1 2 系统硬件电路设计系统硬件电路设计 . 2 2.1 系统框图及工作原理简介. 2 2.2 系统所用主要芯片介绍. 3 2.2.1 PIC16F684 功能介绍 3 2.2.2 L6562D 功能介绍 . 9 2.2.3 HV9922 功能介绍 . 10 2.3 系统硬件电路设计. 11 2.3.1 AC-DC 变换电路 11 2.3.2 DC-DC 变换电路 12 2.3.3 微控制器及外围电路 12 2.3.4 四路驱动电路 14 2.3.5 输出过流保护电路 15 3 系统程序测试系统程序测试 16 3.1 项目实现功能. 16 3.2 软件设计思路. 16 3.3 汇编程序流程. 16 4 总结总结 20 致谢致谢 20 参考文献参考文献 21 附录附录 22 测试程序清