Synchronous Rectification Strategy for LLC Resonant DC-DC Converter

Abstract:

High efficiency /high power density is one of the hottest research spots in power electronics technique. Due to simple structure and high conversion efficiency, the LLC resonant DC-DC converter has great utilization potential in many application areas. To improve the conversion efficiency and the power density further, synchronous rectifier is widely adopted at the secondary-side. Based on the existed synchronous rectified LLC resonant DC-DC converter reviewed in this paper, advantages and disadvantages are analyzed and compared in detail. A novel primary-side current sensing strategy and a new current driving method for voltage-doubler rectifier are presented. Finally, this paper proposes a family of novel single package structure for synchronous rectifier from the view point of power electronics integration to improve the performance further.

• Periodical: Advanced Materials Research (Volumes 317-319)
• Pages: 2138-2143
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.317-319.2138
• Online since: August 2011
• Authors: Zhen Xu, Guo Xing Zhang
• Keywords: High Power Density, List High Efficiency, LLC Resonant DC-DC Converter, Single Package Technique, Synchronous Rectifier

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