A simple and novel two phase interleaved LLC series resonant converter employing a phase of the resonant capacitor

Abstract

LLC series resonant converter has many unique characteristics and improvements over PWM topologies. However, many output capacitors are needed in parallel to satisfy an output voltage ripple and a rated ripple current of the capacitors. This paper is dealt with a novel two phase interleaved LLC resonant converter using a phase of the resonant capacitor. The proposed converter satisfies low output-voltage ripple requirement and meets the rated ripple of output capacitor's current with few output capacitors. The operation and features is considered in detail and a prototype with a 12 V-100 A output is investigated.