Adaptive frequency control technique for enhancing transient performance of DC-DC converters

被引：12

作者：

Huang, Hong-Wei ^{[1
]}

Hsieh, Chun-Yu ^{[2
]}

Chen, Ke-Horng ^{[2
]}

Kuo, Sy-Yen ^{[1
]}

机构：

[1] Natl Taiwan Univ, Grad Inst Elect Engn, Taipei 10764, Taiwan

[2] Natl Chiao Tung Univ, Dept Elect & Control Engn, Hsinchu, Taiwan

来源：

ESSCIRC 2007: PROCEEDINGS OF THE 33RD EUROPEAN SOLID-STATE CIRCUITS CONFERENCE | 2007年

关键词：

D O I：

10.1109/ESSCIRC.2007.4430273

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：

An adaptive frequency control (AFC) technique is proposed for minimizing transient dropout voltage and response time of switching DC-DC converters. As we know, nonlinear fast-transient techniques with fixed switching frequency can effectively regulate the unstable output voltage back to steady-state within a short time. However, they suffer from oscillation problem because of large sourcing or sinking recovery current at output of error amplifier by fast transient circuit. Therefore, linear operation provided by AFC technique can dynamically and smoothly adjust the switching frequency, which is proportional to the output voltage variation, to regulate output voltage back to its steady-state value. In other words, AFC technique eliminates system and sub-harmonic oscillation scenarios. Experimental results demonstrate the transient dropout voltage is improved 37.8% when load current changes from 100 mA to 500 mA.

引用

页码：174 / +

页数：2

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