Design of Compensation Circuits for Quasi-Resonant PWM Controllers
The quasi-resonant converters can significantly reduce the turn-on losses,but the line voltage feed-forward characteristics are sacrificed in order to get the good transient response in current mode quasi-resonant converters. In this paper,a voltage feed-forward compensation circuit is proposed which effectually resolved above-mentioned problem.Simultaneity,to prevent the possible unstable operation at the large load conditions,an internal synchronized slop compensation circuit is added to the current loop to ensure system stable operation.Based on 1 um 40V BCD process,the voltage feed-forward compensation and adaptive slop compensation circuits were designed,the excellent transient response and system stability are obtained eventually.When the output system is 12V/30W,the voltage regulation can be reduced to 0.17% from 0.5% (without voltage feed-forward compensation) and the load regulation is 7.5mV/A with these modules in chip in the same power supply system.
Quasi-Resonant Adaptive Slop Compensation Feed-Forward Compensation Transient Response
Zhao Ye Zhou Yumei Duan Liye
Institute of Microelectronics of Chinese Academy of Sciences,Beijing,100029,China Hunan University with the Institute of Microelectronics of Chinese Academy of Sciences
国际会议
2009 IEEE 8th International Conference on ASIC(第八届IEEE国际专用集成电路大会)
长沙
英文
1129-1132
2009-10-20（万方平台首次上网日期，不代表论文的发表时间）