1. 中国科学院 微电子研究所,北京,100029
2. 中国科学院大学,北京,100049
纸质出版:2020
移动端阅览
酒耐霞, 王立新, 陈润泽, 张洪凯, 郭敏. 基于动态斜坡补偿电流型开关电源环路稳定性分析[J]. 微电子学与计算机, 2020, 37(11): 35-40,47.
JIU Nai-xia, WANG Li-xin, CHEN Run-ze, et al. Stability analysis based on dynamic slope compensation current mode switching power supply loop[J]. 2020, 37(11): 35-40.
基于FVF结构,设计一种新型动态斜坡补偿的电路,检测输入和输出电压,产生动态的补偿电压,在稳定环路的基础上,尽可能提高环路的响应速度.对开关电源的控制电路各个模块建立等效小信号模型,分析内部电流环路和外部电压环路的开环增益函数,得出系统次斜坡振荡的原因.对比动态斜坡补偿方案与恒定斜坡补偿下的电压和电流环路的稳定性和响应速度,采用matlab软件仿真验证.仿真结果表明:动态斜坡补偿电路可有效抑制系统的次斜坡振荡现象,提高系统的动态响应速度.
Based on FVF structure
a new dynamic slope compensation circuit is designed to detect the input and output voltage
generate dynamic compensation voltage
and improve the response speed of the loop as much as possible on the basis of stable loop.The equivalent small signal model is established for each module of the control circuit of the switching power supply
and the open-loop gain function of the internal current loop and external voltage loop is analyzed to obtain the cause of sub-ramp oscillation of the system.The stability and response speed of voltage and current loop under dynamic slope compensation scheme and constant slope compensation scheme were compared
and matlab software was used for simulation verification.The simulation results show that the dynamic slope compensation circuit can effectively suppress the sub-slope oscillation and improve the dynamic response speed of the system.
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