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大功率LED照明电路高效驱动技术研究

更新时间:2020-06-04 11:21:46 大小:281K 上传用户:xiaohei1810查看TA发布的资源 标签:led照明 下载积分:5分 评价赚积分 (如何评价?) 打赏 收藏 评论(0) 举报

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大功率发光二极管因其良好的性能在照明中得到广泛应用。介绍了发光二极管的电特性,并根据并联、串联的特点,对具有较好稳定性与可靠性的LED串并联组合电路加以分析。研究了用恒定输出电流驱动大功率LED组的反激式电路.并给出电路参数设计。根据驱动方法,构建了10.0V/1.10A的输出电路原型,并在额定负荷与过载负荷下进行测试,以检验电流的稳定性。试验结果表明,这个LED驱动电路精度高、性能稳定、效率高,说明所提出的方法对于驱动大功率发光二极管是切实可行的。

High-power LED is widely used in lighting due to its good features. In this paper, electrical properties of LED are introduced. The series-parallel combinational circuit of LED with perfect stability and reliability is analyzed on the basis of the features of parallel connection and series connection. A flyback circuit which drives high-power LED group with a constant-output-current is investigated, and its parameters are designed. According to its driving method, a circuit prototype with 10.0 V/1.10 A output was built and tested under the rated load and overload conditions to verify its current stability. Experimental results show that the LED drive circuit has a high accuracy, good stability and high efficiency...

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