1、 xx大学学士学位论文 - - - I - 大功率大功率 LED 驱动电源研究驱动电源研究 摘要摘要 大功率 LED 以其高效、节能、环保、寿命长、可靠性高等优点正在逐渐取 代传统的白炽灯、荧光灯成为新一代照明光源。随着大功率照明 LED 性能的提 高及生产成本的降低，其应用领域正由屏幕背光源以及一些对亮度要求不高的 景观照明领域向普通白光照明领域扩展。与此同时，与功率型 LED 配套的驱动 集成电路的研发也由于功率型 LED 逐渐得到广泛的应用而迅速的发展。 本文结合大功率 LED 的特性及对现有驱动电路的分析比较，研究制定基于 恒流驱动方式的大功率 LED 驱动电源设计方法。根据现有大功率
2、 LED 路灯的 功率资料，提出了大功率 LED 路灯的设计方案，并设计出相应的驱动电路。该 驱动电路配有线性调光功能，可根据需要，对外部部件参数进行修改，达到调 光的功能，并可根据外部电路的变化，驱动不同功率的路灯，实现了驱动电路 的多功能性，使用简单、方便。 目前，大功率 LED照明技术日趋成熟，大功率 LED光源功效已经达到 100lm/W 以上，这使得城市路灯照明节能改造成为可能。LED路灯，特别是大 功率 LED路灯，正以迅猛的速度冲击传统的路灯市场。而相对大功率 LED路灯 应用中的驱动电路也正如雨后春笋般萌发。 关键词关键词 大功率 LED；道路照明；驱动电源 xx大学学士学位论
3、文 - - - II - High-Power LED Driver Power Research Abstract The high efficiency LED lighting is gradually replacing incandescent and fluorescent lighting due to its unique attributes such as high efficiency, low energy consumption, low pollution, long life and high reliability. As the quality of powe
4、r LED improves and the cost of power LED reduces, its application field has gradually turned from signal lighting and display lighting to general room lighting. Along with the development of power LED, the research of its driving IC has also been greatly accelerated. This article unifies the charact
5、eristic of LED and the existing driving circuits analytical study, summarizes that uses constant current drive type drive high efficiency LED is the most ideal way. According to the existing data of high efficiency LED Street lights power, proposed the high efficiency LED street lights design propos
6、al, and designs the corresponding driving circuit. This driving circuit has the linear dimming function, which can be to regulate an external resistor to achieve dimming function, may according to the need, adjust an exterior resistance, achieves dimming function, and according to the exterior electric circuits change,driving different power street light, realized driving circuits multi-purpose, the use has been simple and convenient. At present，the high efficiency LED lighting techniqu
