毕业设计-高亮度LED驱动电路设计

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1、 I 市电供电高亮度 LED 驱动电路设计 学 号: * 姓 名: * 专 业:* 指导老师: * 二零一四年六月四号 I 摘 要 随着大功率 LED 在照明、灯饰以及显示屏中的普遍使用，大功率下的 LED 驱动 显得越来越重要。在 LED 快速发展的今天，LED 驱动电路也要求着研发者们快速跟 进，多种驱动并存的方式，不同的设计方案也在完善着。在 LED 照明领域，没有好 的驱动器与之匹配，LED 照明的优点将无法体现出来。大功率 LED 是电流型器件， 严格的控制其流过的电流的恒定显得尤为重要。然而，选择大功率 LED 的驱动方案， 还要根据 LED 的电气特性考虑到诸多对电路有影响的因素

2、。 本设计基于市供电对 LED 的相控调光驱动方式进行了探讨，设计了一个利用导 通时间和频率控制实现 LED 亮度控制。 本设计对 LED 照明功能的功能及其工作原理 进行研究与分析，全面综合的介绍并分析了 LED 作为光源在道路照明领域应用的情 况和特点。重点介绍了该系统中 LED 和开关电源的相关知识、驱动电路的设计，并 给出了基于 NXP 公司的 SSL2103 驱动控制器的 LED 驱动的实际电路。在对驱动控 制器 SSL2103 的特点、控制功能、组成的 LED 驱动电路的主要技术特点以及电路的 工作原理进行分析后，确定所设计的驱动电路能保证 LED 的亮度变化可控制性以及 实际性。

3、 关键词：大功率 LED； 市供电； 亮度控制； 工作原理 Abstract With the widespread use of high power LED lighting, lighting and display, high power LED drive becomes more and more important. In LED rapid development today, the LED driving circuit also requires developers to fast track, many driving coexisted means, differe

4、nt design also is in perfect. In the field of LED lighting, no good driver with matching, advantages of LED lighting will not be reflected. High power LED is a current mode device, a constant current flows through the strict control of the important. However, selection of driving scheme for high pow

5、er LED, according to the electrical characteristics of LED considering many influential factors of circuit. The design of the LED phase control dimming driving mode are discussed,designed by using a time and frequency control LED brightness control. LED lighting function on the function and work pri

6、nciple of the design of research and analysis, a comprehensive introduction and analysis of the situation and characteristics of the application of LED as a light source in the field of road lighting. Introduces the design of the driving circuit of LED related know LED ge,and switching power supply in the system, and gives the actual circuit drive controller NXP based SSL2103 LED driver. The main technical characteristics in the characteristics of driving controller, the co