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Volume 15
Issue 3
10.3390/electronics15030654
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Article

Zero-Voltage-Switching Buck Converter Using Digital Hybrid Control with Variable Slope Compensation

by
Ching-Lung Chu
*,
Ming-Tsung Tsai
*,
Wen-Chuan Fang
* and
Yu-Jui Chen
Department of Electrical Engineering, Southern Taiwan University of Science and Technology, Tainan 710301, Taiwan
*
Authors to whom correspondence should be addressed.
Electronics 2026, 15(3), 654; https://doi.org/10.3390/electronics15030654
Submission received: 1 January 2026 / Revised: 28 January 2026 / Accepted: 31 January 2026 / Published: 2 February 2026
Review Reports Versions Notes

Abstract

This paper proposes a zero-voltage-switching (ZVS) synchronous buck converter employing a digital hybrid control scheme with variable slope compensation. By using an auxiliary-switch network and a digital controller to sense voltage and current, the system can automatically adjust the slope-compensation parameters according to the input and output conditions, thereby enhancing stability over a wide operating range. The proposed method effectively suppresses the reverse-recovery current spike of the synchronous rectifier during continuous conduction mode (CCM) operation and enables the main switch to achieve ZVS, reducing switching loss and improving efficiency. A laboratory prototype with an input voltage range of 30–160 V and output voltage levels of 24 V, 48 V, and 96 V at 5 A is developed to verify the feasibility of the proposed architecture.
Keywords: buck converter; synchronous rectification; reverse recovery; zero-voltage switching; slope compensation buck converter; synchronous rectification; reverse recovery; zero-voltage switching; slope compensation

Share and Cite

MDPI and ACS Style

Chu, C.-L.; Tsai, M.-T.; Fang, W.-C.; Chen, Y.-J. Zero-Voltage-Switching Buck Converter Using Digital Hybrid Control with Variable Slope Compensation. Electronics 2026, 15, 654. https://doi.org/10.3390/electronics15030654

AMA Style

Chu C-L, Tsai M-T, Fang W-C, Chen Y-J. Zero-Voltage-Switching Buck Converter Using Digital Hybrid Control with Variable Slope Compensation. Electronics. 2026; 15(3):654. https://doi.org/10.3390/electronics15030654

Chicago/Turabian Style

Chu, Ching-Lung, Ming-Tsung Tsai, Wen-Chuan Fang, and Yu-Jui Chen. 2026. "Zero-Voltage-Switching Buck Converter Using Digital Hybrid Control with Variable Slope Compensation" Electronics 15, no. 3: 654. https://doi.org/10.3390/electronics15030654

APA Style

Chu, C.-L., Tsai, M.-T., Fang, W.-C., & Chen, Y.-J. (2026). Zero-Voltage-Switching Buck Converter Using Digital Hybrid Control with Variable Slope Compensation. Electronics, 15(3), 654. https://doi.org/10.3390/electronics15030654

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