Synchronous Rectification Strategy for LLC Resonant DC-DC Converter
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.
Z. Xu and G. X. Zhang, "Synchronous Rectification Strategy for LLC Resonant DC-DC Converter", Advanced Materials Research, Vols. 317-319, pp. 2138-2143, 2011