不同模式下反激式开关电源的分析

为优化反激式开关电源的参数设计，在不同模式反激变换器的参数分析基础上，设计了断续模式和连续模式下的22W多路输出反激式开关电源，推导了两种模式下的电源参数计算方法，分析了功率开关管、高频变压器、次级二极管、输出滤波电容等元器件的损耗机理及计算方法，并对全负载范围内的多组数据进行测量。实验表明，电源纹波电压、工作效率等各项指标均符合要求，性能良好；不同模式下反激变换器的参数分析合理，实验效率曲线与损耗分析结果基本一致。

Analysis on Flyback Switching Power Supply under Different Modes

To optimize parameter design of flybaek switching power supply, this paper designs 22 W multi-output flyback switching power supply under discontinuous current mode and continuous mode based on the parameter analysis of flyback converter under different modes, deduces the power parameter calcu- lation method under two modes, analyses the loss mechanism and calculation methods of power switch tube, high-frequency transformer, secondary diode, output filter capacitor and so on, and measures multi- ple sets of data within full load scope. The experiment shows that the indicators such as power supply rip- ple voltage, work efficiency conforms to the requirement, shows good performance, the parameter analysis of flyback converter is reasonable under different modes, experimental efficiency curve and loss analysis re- sult basically consistent.