Title :
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
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;
Conference_Titel :
Applied Power Electronics Conference and Exposition (APEC), 2013 Twenty-Eighth Annual IEEE
Conference_Location :
Long Beach, CA
Print_ISBN :
978-1-4673-4354-1
Electronic_ISBN :
1048-2334
DOI :
10.1109/APEC.2013.6520577
