Critical ESR of output capacitor for stability of fixed off-time controlled buck converter

被引：16

作者：

Bao, B. C. ^{[1
]}

Zhang, X. ^{[1
]}

Xu, J. P. ^{[2
]}

Wang, J. P. ^{[2
]}

机构：

[1] Changzhou Univ, Sch Informat Sci & Engn, Changzhou 213164, Jiangsu, Peoples R China

[2] Southwest Jiaotong Univ, Sch Elect Engn, Chengdu 610031, Sichuan, Peoples R China

来源：

ELECTRONICS LETTERS | 2013年 / 49卷 / 04期

基金：

中国国家自然科学基金;

关键词：

D O I：

10.1049/el.2012.2607

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Fixed off-time control, contrasting with constant on-time control, has been widely used for power supply controllers in industry owing to its fast transient response. However the equivalent series resistance (ESR) of the output capacitor has a great effect on the control performance. In this reported work, the critical ESR of the output capacitor for the stability of the fixed off-time controlled buck converter is derived by quantitative analysis and verified by circuit simulations, which indicates that the converter is in normal operation when the ESR is larger than the critical ESR, otherwise the converter works abnormally.

引用

页码：287 / 288

页数：2

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