Improved digital control scheme of synchronous rectification for resonant converter at light load conditions

Mitsuru Sato; Gamal M. Dousoky; Masahito Shoyama

doi:10.1109/INTLEC.2015.7572442

Improved digital control scheme of synchronous rectification for resonant converter at light load conditions

Mitsuru Sato, Gamal M. Dousoky, Masahito Shoyama

Applied Energy Engineering

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

Abstract

This paper proposes a synchronous rectification (SR) control scheme for LLC resonant converter by digital controller. In the proposed SR control scheme, conduction detector circuit senses the drain-source voltage of secondary SR switches to detect the state of paralleled body diode. Digital controller tunes the turn-on and turn-off time of SR switches depending on conduction detector circuit output. Proposed SR control scheme can properly achieve SR at full load condition a simple implementation. Furthermore, it is capable of suppressing circulating current from output to input than conventional SR control scheme in light load condition. Thus, proposed SR control scheme can improve efficiency rather than conventional SR control scheme.

Original language	English
Title of host publication	2015 IEEE International Telecommunications Energy Conference, INTELEC 2015
Publisher	Institute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)	9781479965823
DOIs	https://doi.org/10.1109/INTLEC.2015.7572442
Publication status	Published - Sep 20 2016
Event	2015 IEEE International Telecommunications Energy Conference, INTELEC 2015 - Osaka, Japan Duration: Oct 18 2015 → Oct 22 2015

Publication series

Name	INTELEC, International Telecommunications Energy Conference (Proceedings)
Volume	2016-September
ISSN (Print)	0275-0473

Other

Other	2015 IEEE International Telecommunications Energy Conference, INTELEC 2015
Country/Territory	Japan
City	Osaka
Period	10/18/15 → 10/22/15

All Science Journal Classification (ASJC) codes

Energy Engineering and Power Technology
Electrical and Electronic Engineering

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10.1109/INTLEC.2015.7572442

Cite this

Sato, M., Dousoky, G. M., & Shoyama, M. (2016). Improved digital control scheme of synchronous rectification for resonant converter at light load conditions. In 2015 IEEE International Telecommunications Energy Conference, INTELEC 2015 [7572442] (INTELEC, International Telecommunications Energy Conference (Proceedings); Vol. 2016-September). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/INTLEC.2015.7572442

Improved digital control scheme of synchronous rectification for resonant converter at light load conditions. / Sato, Mitsuru; Dousoky, Gamal M.; Shoyama, Masahito.

2015 IEEE International Telecommunications Energy Conference, INTELEC 2015. Institute of Electrical and Electronics Engineers Inc., 2016. 7572442 (INTELEC, International Telecommunications Energy Conference (Proceedings); Vol. 2016-September).

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

Sato, M, Dousoky, GM & Shoyama, M 2016, Improved digital control scheme of synchronous rectification for resonant converter at light load conditions. in 2015 IEEE International Telecommunications Energy Conference, INTELEC 2015., 7572442, INTELEC, International Telecommunications Energy Conference (Proceedings), vol. 2016-September, Institute of Electrical and Electronics Engineers Inc., 2015 IEEE International Telecommunications Energy Conference, INTELEC 2015, Osaka, Japan, 10/18/15. https://doi.org/10.1109/INTLEC.2015.7572442

Sato M, Dousoky GM, Shoyama M. Improved digital control scheme of synchronous rectification for resonant converter at light load conditions. In 2015 IEEE International Telecommunications Energy Conference, INTELEC 2015. Institute of Electrical and Electronics Engineers Inc. 2016. 7572442. (INTELEC, International Telecommunications Energy Conference (Proceedings)). https://doi.org/10.1109/INTLEC.2015.7572442

Sato, Mitsuru ; Dousoky, Gamal M. ; Shoyama, Masahito. / Improved digital control scheme of synchronous rectification for resonant converter at light load conditions. 2015 IEEE International Telecommunications Energy Conference, INTELEC 2015. Institute of Electrical and Electronics Engineers Inc., 2016. (INTELEC, International Telecommunications Energy Conference (Proceedings)).

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abstract = "This paper proposes a synchronous rectification (SR) control scheme for LLC resonant converter by digital controller. In the proposed SR control scheme, conduction detector circuit senses the drain-source voltage of secondary SR switches to detect the state of paralleled body diode. Digital controller tunes the turn-on and turn-off time of SR switches depending on conduction detector circuit output. Proposed SR control scheme can properly achieve SR at full load condition a simple implementation. Furthermore, it is capable of suppressing circulating current from output to input than conventional SR control scheme in light load condition. Thus, proposed SR control scheme can improve efficiency rather than conventional SR control scheme.",

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AB - This paper proposes a synchronous rectification (SR) control scheme for LLC resonant converter by digital controller. In the proposed SR control scheme, conduction detector circuit senses the drain-source voltage of secondary SR switches to detect the state of paralleled body diode. Digital controller tunes the turn-on and turn-off time of SR switches depending on conduction detector circuit output. Proposed SR control scheme can properly achieve SR at full load condition a simple implementation. Furthermore, it is capable of suppressing circulating current from output to input than conventional SR control scheme in light load condition. Thus, proposed SR control scheme can improve efficiency rather than conventional SR control scheme.

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Improved digital control scheme of synchronous rectification for resonant converter at light load conditions

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