1、 毕 业 论 文（设 计） 中文题目：中文题目： DCDC- -DC LEDDC LED 驱动电路设计驱动电路设计 英文题目英文题目: The DC-DC Driver Cricuit Design of LED I DCDC- -DC LEDDC LED 驱动电路设计驱动电路设计 中文摘要 摘摘 要要 随着大功率 LED 在灯光装饰和照明中的普遍使用， 大功率 LED 驱动电路设计显得越来 越重要。在 LED 迅速发展的今天，LED 驱动电路也随之快速跟进，多种驱动方式并存，不 同的设计方案在完善。在 LED 照明领域，没有好的驱动器的匹配，LED 照明的优势将无法 体现。大功率 LED 是
2、电流型器件，严格的控制流过 LED 的电流是恒定的及其重要，而且还 要实现可以对 LED 调光，满足各种需求。 本论文对 LED 的驱动方式进行了深入探讨，并基于集成电路 PT4115 设计了一个低成 本、高效率、发光可调的恒流驱动电路，用以实现大功率 LED 的驱动。对驱动电路原理进 行分析后，动手制作了实物电路，并用示波器观察了电路输出波形。实验结果表明所设计 的驱动电路能保证 LED 的稳定高效率发光，在工程上有广泛地应用前景。 【关键词】 ：大功率 LED、开关电源、PWM、恒流驱动、PT4115、STC89C52 英文摘要 II The DC-DC Driver Cricuit De
3、sign of LED Author： Zhou Biaoping Major：Electronic Information Engineering Teacher：Cao Jianzhong Title：professor (Electronic Science Deparment of Huizhou University，Guangdong，Huizhou，516007) Abstract With the widespread use of high-power LED in the lighting and decoration ,the driver circuit design
4、of high-power LED is becoming increasingly important. Today at the rapid development of LED, LED drive circuit also will fast track, multi-drive circuit modes exist,and different designs options is in improving. in the area of LED lighting, if there is no good driver circuit using, the advantages of
5、 LED will not be reflected. High-power LED is current-mode devices, strict control of constant current flowing through the LED is important, but also the LED dimming can be achieved to meet the various needs. The dissertation discusses in depth the driving LED mode, and based on IC PT4115 I design a
6、 lowcost,high efficiency, longer life,dimmable and constant current drive circuit to drive high-power LED. Then to analysis the driving circuit, I made the physical circuit and watched the circuit output with an oscilloscope waveform. The experimental results show that the design of the drive circuit can guarantee the stability of high-efficiency light-emitting LED, and I think that the driver circuit will be widespread used in engineering applications. 【key words】: High-
