| 基于SA7527的LED照明驱动电源的研制 |
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| 引用本文： | 龙兴明,周静. 基于SA7527的LED照明驱动电源的研制[J]. 电子器件, 2007, 30(3): 904-907 |
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| 作者姓名： | 龙兴明 周静 |
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| 作者单位： | 重庆师范大学物理系,重庆400047;重庆大学电气工程学院,重庆,400044;重庆大学电气工程学院,重庆,400044 |
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| 摘 要： | 发光二极管(LED)驱动电源对LED照明技术的推广有着重要的意义.现存的多种LED驱动电源不能充分发挥LED的优点,因此提出一种基于sa7527开关电源结构的LED自适应驱动电路.从分析LED的驱动特性出发,利用高密度电源控制芯片sa7527,结合输出光强和LED温度的检测,实现对LED的恒流驱动,过压保护和光衰补偿功能.实际应用表明,该驱动电路满足LED作为照明的实际需要.
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| 关 键 词： | 半导体发光灯 发光二极管驱动 sa7527 光衰补偿 |
| 文章编号： | 1005-9490（2007）03-0904-04 |
| 修稿时间： | 2006-06-19 |
Development of LED Lighting Driver Based SA7527 |
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| LONG Xing-ming,ZHOU Jing. Development of LED Lighting Driver Based SA7527[J]. Journal of Electron Devices, 2007, 30(3): 904-907 |
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| Authors: | LONG Xing-ming ZHOU Jing |
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| Affiliation: | 1. Physics Dept. of Chongqing Normal University, Chongqing 400047; 2. EE Department of Chongqing University, Chongqing 400044, China China; |
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| Abstract: | The implemention of Light Emitting Diode(LED) driver is a key to the application of LED.Although,there are many types LED driver,many of them can not make use of LED's advantages fully.An adaptive LED driver based on switching power supply topology is proposed.First,the LED's characteristics are analyzed;then,the driver is designed accordingly,using the high-density power manager IC sa7527,optical sensor and temperature sensor,which can supply constant current,over-voltage protected and auto-lumen attenuation compensation.The practical application shows that the developed LED driver meets the characteristics of LED. |
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| Keywords: | semiconductor lighting LED driver sa7527 attenuation compensation |
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