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本文提出了Buck电路用作LED驱动的主电路连接方式。在对各种电流控制模式进行分析的基础上,引入固定导通时间(COT)控制模式,保留滞环控制优点的同时能有效解决滞环控制的频率变化问题。对其稳态和动态性能进行分析,获得了良好稳态精度和动态性能。并采用电力电子专用仿真软件PSIM(6.0版)对Buck变换器LED驱动电路进行了仿真。
Abstract：This article proposes to use Buck LED driver circuit as the main circuit connection.On the basis of an analysis of various types of current control modes,fixed-time(COT) control mode is introduced,which retains advantages of hysterics control and solves the frequency change of hysterics control effectively as well.Through analysis of its steady-state and dynamic performance,the system can gain a good steady state accuracy and dynamic performance.By the use of dedicated power electronic simulation software PSIM(version 6.0),the Buck converter LED drive circuit is simulated.
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基本信息:
中图分类号:TM46
引用信息:
[1]陆治国,吴春军,赵丽丽,等.基于降压型LED驱动电路分析和研究[J].深圳信息职业技术学院学报,2011,9(03):79-84.
基金信息:
重庆市科技计划项目(CQKJ20100205)