Reduction of equivalent series inductor effect in delay-ripple reshaped constant on-time control for buck converter with multi-layer ceramic capacitors

Wei Chung Chen*, Yu Chi Kang, Chia Ching Lin, Ke-Horng Chen, Shih Ming Wang, Ming Wei Lee, Hsin Yu Luo

*Corresponding author for this work

研究成果: Conference contribution同行評審

4 引文 斯高帕斯(Scopus)

摘要

The time constant, which is the product of the output capacitor and its equivalent series resistance (ESR), limits the stability of conventional constant on-time control buck converter. To meet the expected requirements, SP-CAP is mostly used as output capacitor although it deteriorates the performance of converter. On the other hand, the multi-layer ceramic capacitors (MLCC) features low cost and small equivalent series resistance (ESR) and is widely used in commercial power management ICs. However, the stability often suffers from the sub-harmonic problem due to small time constant. This paper proposes a differential-zero compensator with the noise margin enhancement (DZC-NME) technique in constant on-time control buck DC-DC converter with ceramic output capacitor. The proposed DZC-NME technique not only eliminates the limit of large time constant but also tolerates the existence of equivalent series inductor (ESL) effect. Simulation result demonstrates the function and shows smaller output ripple of 10mV and high efficiency of 91 % with ESR which smaller than 1m.

原文English
主出版物標題2012 IEEE Energy Conversion Congress and Exposition, ECCE 2012
頁面755-758
頁數4
DOIs
出版狀態Published - 17 十二月 2012
事件4th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2012 - Raleigh, NC, United States
持續時間: 15 九月 201220 九月 2012

出版系列

名字2012 IEEE Energy Conversion Congress and Exposition, ECCE 2012

Conference

Conference4th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2012
國家United States
城市Raleigh, NC
期間15/09/1220/09/12

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