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Open AccessArticle

Light-Load Efficiency Improvement for Ultrahigh Step-Down Converter Based on Skip Mode

1
Department of Ph.D. Program, Prospective Technology of Electrical Engineering and Computer Science, National Chin-Yi University of Technology, Taichung 41170, Taiwan
2
Department of Electrical Engineering, National Chin-Yi University of Technology, Taichung 41170, Taiwan
3
Department of Electrical Engineering, National Taipei University of Technology, Taipei 10608, Taiwan
4
Electronics and Optoelectronics System Research Laboratories, Industrial Technology Research Institute, Hsinchu 30011, Taiwan
*
Author to whom correspondence should be addressed.
Academic Editor: Eduardo M. G. Rodrigues
Electronics 2021, 10(3), 355; https://doi.org/10.3390/electronics10030355
Received: 12 December 2020 / Revised: 19 January 2021 / Accepted: 26 January 2021 / Published: 2 February 2021
(This article belongs to the Special Issue Power Electronics in Industry Applications)
In this paper, two light-load efficiency improvement methods are presented and applied to the ultrahigh step-down converter. The two methods are both based on skip mode control. Skip Mode 1 only needs one half-bridge driver integrated circuit (IC) to drive three switches, so it has the advantages of easy signal control and lower cost, whereas Skip Mode 2 requires one half-bridge driver integrated circuit IC, one common ground driver IC, and three independent timing pulse-width-modulated (PWM) signals to control three switches, so the cost is higher and the control signals are more complicated, but Skip Mode 2 can obtain slightly higher light-load efficiency than Skip Mode 1. Although the switching frequency used in these methods are reduced, the transferred energy is unchanged, but the output voltage ripple is influenced to some extent. View Full-Text
Keywords: light-load efficiency; skip mode; ultrahigh step-down; PWM light-load efficiency; skip mode; ultrahigh step-down; PWM
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MDPI and ACS Style

Yau, Y.-T.; Wang, C.-W.; Hwu, K.-I. Light-Load Efficiency Improvement for Ultrahigh Step-Down Converter Based on Skip Mode. Electronics 2021, 10, 355. https://doi.org/10.3390/electronics10030355

AMA Style

Yau Y-T, Wang C-W, Hwu K-I. Light-Load Efficiency Improvement for Ultrahigh Step-Down Converter Based on Skip Mode. Electronics. 2021; 10(3):355. https://doi.org/10.3390/electronics10030355

Chicago/Turabian Style

Yau, Yeu-Torng; Wang, Chao-Wei; Hwu, Kuo-Ing. 2021. "Light-Load Efficiency Improvement for Ultrahigh Step-Down Converter Based on Skip Mode" Electronics 10, no. 3: 355. https://doi.org/10.3390/electronics10030355

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