LLC半桥谐振变换器参数优化设计与实现

摘要

Half-bridge LLC resonant converter of high efficiency and high power density is widely used to drive the LED light source. Through the analysis of its principle, characterization and the resonant network transmission efficiency, we summed up a simple parameter design method. This method designs the LLC half-bridge resonant circuit of 100kHz and 120W with 90% conversion efficiency. The results of experiment confirm the feasibility of the design method.%LLC半桥谐振变换器的高效率、高功率密度使其广泛应用于LED光源驱动器。通过对其工作原理、特性及谐振网络传输效率的分析，归纳出一种简易的参数设计方法。最后，用该方法设计了具有90%变换效率的100kHz、120W的LLC半桥谐振电路，实验结果证实了此设计方法的可行性。