Technical Articles

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1.5 kW High-Frequency LLC Converter

Technical Article – Authors: M. Marceau – H. Huillet – P. Marchand


This paper describes the design and implementation of a compact and high-frequency LLC converter with wide input voltage range (from 220 V to 320 V), output power range (from 250 W to 1.5 kW), high efficiency (over 96 % at full power), high power-density (32 kW/dm 3 ) and narrow frequency variations (15 %).
A complete and automated optimization process has been developed, including the comparison between different semiconductor technologies and the design of a Matrix Transformer that reduces the height of this magnetic component. A fully customized converter has been developed using an automated design tool.