输出滤波器是DC/DC变换器中的重要组成部分,与变换器的动态性能、整机体积和成本等性能指标密切相关。在满足技术指标的前提下,滤波元件的取值越小,对变换器整机性能的提高越有利,越能提高变换器的功率密度。在考虑开关频率和软开关技术等因素的情况下,对不同DC/DC变换器拓扑中的LC输出滤波器进行了比较。结果表明,从输出滤波器角度出发,某些变换器拓扑具有明显的优势。 The output filter is an important part of the DC / DC converter, which is closely related to the performance of the converter such as dynamic performance, volume and cost of the whole machine. In the premise of meeting the technical indicators, the smaller the value of the filter components, the better the performance of the converter to improve the more, the more you can increase the power density of the converter. The LC output filters in different DC / DC converter topologies are compared considering switching frequency and soft-switching techniques. The results show that some converter topologies have obvious advantages from the output filter point of view.