SMARTRECTIFIER™ CONTROL SIMPLIFIES OUTPUT SYNCHRONOUS RECTIFICATION IN DC-DC SERIES RESONANT CONVERTERS

摘要

The LLC series resonant converter has become an attractive topology for front-end DC bus conversion. Synchronous rectification at the output has not been widely implemented for this resonant converter topology today due to the complexity, cost and unsatisfactory performance of existing discrete/integrated solutions. In this paper, we briefly discuss some of these issues and demonstrate how the SmartRectifier™ control technique presents a simple, high performance solution that overcomes the challenges in implementing synchronous rectification in resonant converters. Experimental results on a 16V/130W series resonant converter verify functionality under all operating conditions including burst mode operation during light load.