液晶与显示2012，Vol.27Issue(2)：217-222,6.DOI:10.3788/YJYXS20122702.0217
斜坡补偿电路在峰值电流控制模式中的应用
Application of Slope Compensation Circuit in Peak Current Control
摘要
Abstract
The paper introduces the principle of driving circuit of switching power in peak current control mode. When duty-cycle is D>50% ,the reasons for instability and oscillation in the system are analyzed,the relationship of the inductor current slope,duty-cycle and system stability is discussed. The way of slope compensation is applied to realizing stability of driving circuit in peak current control mode and the principle of slope compensation and design step and compensation circuit is given. Finally,the paper gives a practical slope compensation circuit of fly-back converter controlled by UC3842. The result of simulation and experiment shows that slope compensation circuit can realize switch power stability in peak current control mode when duty-cycle is D>50%,and can ensure stability of system and ability of anti-interference.关键词
峰值电流/斜坡补偿/开关变换器/误差电压Key words
peak current/slope compensation/switch converter/error voltage分类
信息技术与安全科学引用本文复制引用
史永胜,张建飞,宁青菊,牛力..斜坡补偿电路在峰值电流控制模式中的应用[J].液晶与显示,2012,27(2):217-222,6.基金项目
陕西省教育厅专项研究计划(No.11JK0837) （No.11JK0837）
