介绍了一种高功率密度、宽输入电压范围的LLC谐振变换器设计方法。首先,通过基波等效模型分析了电路的直流增益特性,并以此为依据讨论了宽输入电压范围的LLC谐振变换器参数设计要点;然后,根据损耗分析和实验研究讨论了小功率电路设计中磁元件的重要性。最后,通过实验验证了上述分析结果。
A high power density LLC resonant converter design with extra wide input range is presented.The design consideration for the resonant parameters is discussed.Effect of magnetic component design on the converter efficiency is studied by loss analysis and experiment.The prototype with switching frequency higher than 500 kHz is built to verify the design.