Open loop synchronous rectifier driver for LLC resonant converter

Author

Jing Wang ; Bing Lu

Author_Institution

Center for Ultra-Wide-Area Resilient Electr. Energy Transm. Networks (CURENT), Univ. of Tennessee, Knoxville, TN, USA

fYear

2013

fDate

17-21 March 2013

Firstpage

2048

Lastpage

2051

Abstract

Synchronous rectifier (SR) is widely used in LLC resonant converter to reduce the conduction loss. Due to different operation modes, the SR control is complicated and increases system cost. In this paper, based on the observation on LLC diode conduction time, an open-loop fixed-on-time SR driving method is proposed. The optimal on-time is used to control the SR to simplify the implementation in different operation mode and reduce the system cost while maintains large efficiency improvement. The total efficiency of LLC resonant converter with SR driven by the proposed scheme is proved to increase by 2% under different load conditions with minimum system cost.

Keywords

open loop systems; power convertors; rectifiers; LLC diode conduction time; LLC resonant converter; conduction loss; different operation mode; open loop synchronous rectifier driver; total efficiency; LLC resonant converter application; Synchronous rectifier driver; different load conditions; efficiency; fixed time; low cost; primary side gate drive;

fLanguage

English

Publisher

ieee

Conference_Titel

Applied Power Electronics Conference and Exposition (APEC), 2013 Twenty-Eighth Annual IEEE

Conference_Location

Long Beach, CA

ISSN

1048-2334

Print_ISBN

978-1-4673-4354-1

Electronic_ISBN

1048-2334

Type

conf

DOI

10.1109/APEC.2013.6520577

Filename

6520577