Optimal design strategy for three components series LLC resonant converter

Nowadays, three components series LLC resonant converter is one of the most attractive DC/DC converters in the world. Its advantage of conversion efficiency can only be achieved by rational optimal design. Based on the theoretic analysis and loss evaluation about LLC resonant converter, an optimal design strategy for high conversion efficiency is proposed in this paper from aspect of quality factor Q and the ratio of magnetizing inductance of transformer to resonant inductance m. This strategy can be suitable to industrial application generally. Finally, a LLC resonant converter prototype is designed and built up. Its high conversion efficiency verifies the correctness and validity of this optimal design strategy.