A Study on the Synchronous Rectifier Driver Circuits in the LLC Resonant Half-Bridge Converter
LLC 공진형 하프브릿지 컨버터의 동기정류기 구동회로에 관한 연구

Tae-Young Ahn, Bum-Sun Im
2016 Journal of the Korean Institute of Illuminating and Electrical Installation Engineers  
In this paper, we propose a current-driven synchronous rectifier driver circuit for LLC resonant half-bridge converters. The proposed driver circuit detects a relatively low current in the primary side of the transformer although a large current is flowing in the secondary side. Due to this feature, the driver circuit has a simple circuit structure and stabilizes the switching operation with a logic-level switching voltages for the synchronous rectifier. The operation and performance of the
more » ... formance of the proposed driver circuit are confirmed with a prototype of 1kW class LLC resonant half-bridge converter. The experimental results proved that the proposed synchronous rectifier driver method improves the power conversion efficiency by around 1% and reduces the internal power loss by 17W.
doi:10.5207/jieie.2016.30.1.079 fatcat:ag4gue6r7vbxbngp34ov473soi