一种基于仿电流模式控制的开关电源

作者：朱宁,王正仕,邓焰 日期：2008-08-18/span> 浏览：3934 查看PDF文档

一种基于仿电流模式控制的开关电源

朱宁,王正仕,邓焰
（浙江大学 电力电子研究所，浙江 杭州 310027）

摘要：在芯片LM5005仿电流模式控制下，反馈电流为芯片自制而非外界实际电压、电流反馈，因而可避免控制器对噪声过于敏感，使得开关电源系统抗干扰能力更强。应用芯片LM5005的仿电流控制模式设计了1台Boost变换器开关通信电源，并得出了实验波形与整机效率。实践证明，该通信电源输出电压稳定，纹波小，整机效率高。
关键词：仿电流；LM5005；电压反馈；Boost变换器
中图分类号：TM467文献标识码：A文章编号：1001-4551(2008)08-0056-02

A switching power supply based on emulated current mode control
ZHU Ning, WANG Zheng-shi, DENG Yan
(Institute of Power Electronics, Zhejiang University, Hangzhou 310027, China)
Abstract: With emulated current mode control, the feedback current is made by IC but not the actual feedback voltage and current. It prevents control from being too sensitive to the noise from outside, so the power supply can work stabler. Design of switching power supply based on emulated current mode control of LM5005 was proposed. The experiment result of switching power supply based on Boost converter was presented at last. The practice proves that the power supply has characteristus of steaely output voltage, small ripple and high efficiency.
Key words: emulated current; LM5005; voltage feedback; Boost converter