A New Control Scheme for the Buck Converter

Hsiao-Hsing Chou; Jian-Yu Chen; Tsung-Hu Tseng; Jun-Yi Yang; Xuan Yang; San-Fu Wang

doi:10.3390/app13031991

Applied Sciences (Feb 2023)

A New Control Scheme for the Buck Converter

Hsiao-Hsing Chou,
Jian-Yu Chen,
Tsung-Hu Tseng,
Jun-Yi Yang,
Xuan Yang,
San-Fu Wang

Affiliations

Hsiao-Hsing Chou: Department of Computer Science and Information Engineering, National Taichung University of Science and Technology, Taichung 404336, Taiwan
Jian-Yu Chen: Department of Communication Engineering, National Penghu University of Science and Technology, Penghu, Magong City 880011, Taiwan
Tsung-Hu Tseng: Department of Communication Engineering, National Penghu University of Science and Technology, Penghu, Magong City 880011, Taiwan
Jun-Yi Yang: Department of Communication Engineering, National Penghu University of Science and Technology, Penghu, Magong City 880011, Taiwan
Xuan Yang: Department of Communication Engineering, National Penghu University of Science and Technology, Penghu, Magong City 880011, Taiwan
San-Fu Wang: Department of Electronic Engineering, National Chin-Yi University of Technology, Taichung 411030, Taiwan

DOI: https://doi.org/10.3390/app13031991
Journal volume & issue: Vol. 13, no. 3
p. 1991

Abstract

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In this paper, a new control scheme for buck converters was proposed. The buck converter utilizes the dual control loop to improve transient response and has the constant switching frequency. The control scheme is mainly as follows: (a) The switch-ON time is regulated by the constant frequency mechanism. (b) The switch-OFF time is regulated by the output voltage. The spec/features of the proposed converter are listed as: (1) The buck converter has an output of 1.0–2.5 V for the input of 3.0–3.6 V. The load current ranges from 100 mA to 500 mA. (2) The actual current sensor is not required. (3) The simulation results show that the recovery time is less than 1.6 μs during load changes. (4) The variation in switching frequency is smaller than 1.05% over the output range of 1.0–2.5 V. (5) This circuit can be fabricated in future by UMC 0.18 μm 1P6M CMOS processes. This paper depicts the control scheme, theoretical analysis, and implementation.

Published in Applied Sciences

ISSN: 2076-3417 (Online)
Publisher: MDPI AG
Country of publisher: Switzerland
LCC subjects: Technology: Engineering (General). Civil engineering (General); Science: Biology (General); Science: Physics; Science: Chemistry
Website: http://www.mdpi.com/journal/applsci

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