| 一种精确调光的LED电源设计 |
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| 引用本文： | 陈浩,席光,刘胜. 一种精确调光的LED电源设计[J]. 电源技术, 2011, 35(2) |
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| 作者姓名： | 陈浩 席光 刘胜 |
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| 作者单位： | 陈浩,刘胜,CHEN Hao,LIU Sheng(华中科技大学,武汉国家光电实验室,微光机电部,湖北,武汉,430074;华中科技大学,机械科学与工程学院,湖北,武汉,430074);席光,XI Guang(平洲电子厂,广东,佛山,528200) |
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| 摘 要： | 设计了一种输出电流精确可调的LED电源.系统功率变换部分由PFC和DC/DC两级组成,实现PWM控制输出恒定电流;设计了D/A转换电路和模拟调光电路,将PWM调光信号转换为线性调光电压,实现LED电源输出电流精确可调;采用ATmega8单片机设计了智能调光系统,可以接受RS485总线的调光指令实现256级调光.统测试表明,该电源系统在较大范围内输出电流精确可调,并具有故障检测功能,适合驱动大功率LED路灯、隧道灯.
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| 关 键 词： | LED电源 ATmega8单片机 智能调光 故障检测 |
Design of precise dimming LED power supply |
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| CHEN Hao,XI Guang,LIU Sheng. Design of precise dimming LED power supply[J]. Chinese Journal of Power Sources, 2011, 35(2) |
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| Authors: | CHEN Hao XI Guang LIU Sheng |
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| Affiliation: | CHEN Hao1,3,XI Guang2,LIU Sheng 1,3(1.MOEMS of Wuhan National Laboratory for Optoelectronics,Huazhong University of Science and Technology,Wuhan Hubei 430074,China,2.Pingzhou Electronics,Foshan Guangdong 528200,3.School of Mechanical Science and Engineering,China) |
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| Abstract: | An LED power supply with adjustable accurate current output was designed.The power conversion part of this system was constituted by PFC and DC/DC two stages and the constant current output was controlled by PWM.A D/A circuit and analog dimming circuit were designed,which could transform PWM dimming signal into linear dimming voltage and accurately regulate the current output of the LED power supply.The intelligent dimming system with ATmega8 SCM could modulate the light with 256 grades by receiving dimming... |
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| Keywords: | LED power supply ATmega8 SCM intelligent dimming fault detection |
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