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

doi:10.1109/ECCE.2012.6342744

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

Department of Electrical and Computer Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

4 Scopus citations

Abstract

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.

Original language	English
Title of host publication	2012 IEEE Energy Conversion Congress and Exposition, ECCE 2012
Pages	755-758
Number of pages	4
DOIs	https://doi.org/10.1109/ECCE.2012.6342744
State	Published - 17 Dec 2012
Event	4th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2012 - Raleigh, NC, United States Duration: 15 Sep 2012 → 20 Sep 2012

Publication series

Name	2012 IEEE Energy Conversion Congress and Exposition, ECCE 2012

Conference

Conference	4th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2012
Country	United States
City	Raleigh, NC
Period	15/09/12 → 20/09/12

Access to Document

10.1109/ECCE.2012.6342744

Link to publication in Scopus

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Chen, W. C., Kang, Y. C., Lin, C. C., Chen, K-H., Wang, S. M., Lee, M. W., & Luo, H. Y. (2012). Reduction of equivalent series inductor effect in delay-ripple reshaped constant on-time control for buck converter with multi-layer ceramic capacitors. In 2012 IEEE Energy Conversion Congress and Exposition, ECCE 2012 (pp. 755-758). [6342744] (2012 IEEE Energy Conversion Congress and Exposition, ECCE 2012). https://doi.org/10.1109/ECCE.2012.6342744

Chen, Wei Chung ; Kang, Yu Chi ; Lin, Chia Ching ; Chen, Ke-Horng ; Wang, Shih Ming ; Lee, Ming Wei ; Luo, Hsin Yu. / Reduction of equivalent series inductor effect in delay-ripple reshaped constant on-time control for buck converter with multi-layer ceramic capacitors. 2012 IEEE Energy Conversion Congress and Exposition, ECCE 2012. 2012. pp. 755-758 (2012 IEEE Energy Conversion Congress and Exposition, ECCE 2012).

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

abstract = "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.",

author = "Chen, {Wei Chung} and Kang, {Yu Chi} and Lin, {Chia Ching} and Ke-Horng Chen and Wang, {Shih Ming} and Lee, {Ming Wei} and Luo, {Hsin Yu}",

year = "2012",

month = dec,

day = "17",

doi = "10.1109/ECCE.2012.6342744",

language = "English",

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series = "2012 IEEE Energy Conversion Congress and Exposition, ECCE 2012",

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Chen, WC, Kang, YC, Lin, CC, Chen, K-H, Wang, SM, Lee, MW & Luo, HY 2012, Reduction of equivalent series inductor effect in delay-ripple reshaped constant on-time control for buck converter with multi-layer ceramic capacitors. in 2012 IEEE Energy Conversion Congress and Exposition, ECCE 2012., 6342744, 2012 IEEE Energy Conversion Congress and Exposition, ECCE 2012, pp. 755-758, 4th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2012, Raleigh, NC, United States, 15/09/12. https://doi.org/10.1109/ECCE.2012.6342744

Reduction of equivalent series inductor effect in delay-ripple reshaped constant on-time control for buck converter with multi-layer ceramic capacitors. / Chen, Wei Chung; Kang, Yu Chi; Lin, Chia Ching; Chen, Ke-Horng; Wang, Shih Ming; Lee, Ming Wei; Luo, Hsin Yu.

2012 IEEE Energy Conversion Congress and Exposition, ECCE 2012. 2012. p. 755-758 6342744 (2012 IEEE Energy Conversion Congress and Exposition, ECCE 2012).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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AU - Kang, Yu Chi

AU - Lin, Chia Ching

AU - Chen, Ke-Horng

AU - Wang, Shih Ming

AU - Lee, Ming Wei

AU - Luo, Hsin Yu

PY - 2012/12/17

Y1 - 2012/12/17

N2 - 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.

AB - 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.

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Chen WC, Kang YC, Lin CC, Chen K-H, Wang SM, Lee MW et al. Reduction of equivalent series inductor effect in delay-ripple reshaped constant on-time control for buck converter with multi-layer ceramic capacitors. In 2012 IEEE Energy Conversion Congress and Exposition, ECCE 2012. 2012. p. 755-758. 6342744. (2012 IEEE Energy Conversion Congress and Exposition, ECCE 2012). https://doi.org/10.1109/ECCE.2012.6342744