Journal of Power Electronics

The Korean Institute of Power Electronics (전력전자학회)
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Digital linear slope control method for improving the load transient response of a buck converter

  • Seokwon Kim (Department of Smart Cities, Chung-Ang University) ;
  • Jongun Baek (Department of Smart Cities, Chung-Ang University) ;
  • Junho Shin (Department of Smart Cities, Chung-Ang University) ;
  • Hanhim Sung (Department of Smart Cities, Chung-Ang University) ;
  • Sujeong Lee (Department of Smart Cities, Chung-Ang University) ;
  • Seunguk Yong (School of Energy System Engineering, Chung-Ang University) ;
  • Jong‑Won Shin (School of Energy System Engineering, Chung-Ang University)
  • Received : 2022.12.06
  • Accepted : 2023.01.10
  • Published : 2023.03.20
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Abstract

Digital linear slope control (LSC) method is proposed to reduce the output voltage deviation during the load transient of a buck converter. The proposed LSC method modulates the slope of the control signal to suppress the output voltage deviation. The LSC method utilizes the information of the output voltage only and is realized simply by adding a few lines to the digital code of the conventional VMC. The mathematical analysis is conducted to prove the feasibility of the LSC method and the algorithms for the LSC method are presented. A 15 V-5 V 100-kHz prototype buck converter was built and tested to verify the performance of the LSC method.

Keywords

Acknowledgement

This research was supported by the National Research Foundation of Korea (NRF) funded by the Ministry of Science and ICT under Grants 2021M1A2A2060313 and 2022R1C1C1010027, and Chung-Ang University Graduate Research Scholarship in 2021.

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