华中科技大学学报（自然科学版）Issue(2)：31-34,4.DOI:10.13245/j.hust.140207
峰值电流模 BUCK 变换器的建模及稳定性设计
Modeling analysis and stability design of peak-current mode BUCK converter
摘要
Abstract
Based on the small signal modeling method ,a complete BUCK converter small signal model operating in current-continue-mode (CCM ) was established ,with a control-to-output transfer function derived .T hen ,by detailed calculating the zreos and poles in the transfer function of control-stage loop as well as analysing the effect of the current sensing on the stability of the whole system ,the reason to compensate the voltage loop was illustrated and a novel compensation method was proposed .Prac-tices made by both Matlab and Hspice showed that the modeling and the compensation methods were correct ,and simulation results showed that the low frequency gain of the converter system was as high as 55 dB ,with a bandwidth of 225 kHz ,and the phase margin was 74° ,which made the loop sta-ble at various load conditions .关键词
电压环路补偿/电流模控制/小信号模型/斜波补偿/环路补偿Key words
voltage loop compensation/current-mode control/small signal model/slope compensa-tion/loop compensation分类
信息技术与安全科学引用本文复制引用
叶强,王泽宇,来新泉..峰值电流模 BUCK 变换器的建模及稳定性设计[J].华中科技大学学报（自然科学版）,2014,(2):31-34,4.基金项目
中央高校基本科研业务费专项资金资助项目（K50511020031）． （）
