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<p>High efficiency and high power density power factor correction (PFC) converters are essential for emerging applications, such as aerospace, electric vehicles, and data centers. To meet the demands for compactness and efficiency, this paper proposes a matrix single-stage LLC (M-SLLC)–PFC converter with a secondary-side resonant inductor. This design retains the benefits of traditional LLC converters while enabling effective magnetic integration of the resonant tank. Unlike existing solutions that struggle with oversized primary-side resonant inductors, this approach significantly reduces the inductance to simplify integration and eliminates resonant losses through the transformer, which improves efficiency. In addition, secondary-side magnetic integration reduces the core losses, further enhancing performance. A prototype with a 176 V AC–264&#xa0;V AC input and 500 W/72&#xa0;V output, utilizing GaN switches, achieves an efficiency of 93.87% and a power density of 17.52 W/in<sup>3</sup>, validating the effectiveness of the proposed converter.</p>

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High-frequency matrix single-stage resonant PFC converter with secondary-side resonant inductor

  • 期刊论文

  • 发表日期：

    2025年5月16日

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  • Yufei Zhou,
  • Runzhi Yuan,
  • Qiongya Lou

摘要

High efficiency and high power density power factor correction (PFC) converters are essential for emerging applications, such as aerospace, electric vehicles, and data centers. To meet the demands for compactness and efficiency, this paper proposes a matrix single-stage LLC (M-SLLC)–PFC converter with a secondary-side resonant inductor. This design retains the benefits of traditional LLC converters while enabling effective magnetic integration of the resonant tank. Unlike existing solutions that struggle with oversized primary-side resonant inductors, this approach significantly reduces the inductance to simplify integration and eliminates resonant losses through the transformer, which improves efficiency. In addition, secondary-side magnetic integration reduces the core losses, further enhancing performance. A prototype with a 176 V AC–264 V AC input and 500 W/72 V output, utilizing GaN switches, achieves an efficiency of 93.87% and a power density of 17.52 W/in3, validating the effectiveness of the proposed converter.