摘要
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。
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.
出处
《深圳信息职业技术学院学报》
2011年第3期79-84,共6页
Journal of Shenzhen Institute of Information Technology
基金
重庆市科技计划项目(CQKJ20100205)
