对传统拓扑结构应用于高压辅助电源设计中的缺点进行分析,提出了一种新型的数模控制宽输入高压辅助电源设计方案。对该方案进行了原理分析,较全面地评估了单片机控制辅助电源启动电路、PWM控制电路、反激主电路、变压器等模块的设计参数。最后,采用该方案,设计了一款实验电路。仿真和实验电路测试结果表明,该方案满足设计要求。 Based on the analysis of the disadvantages of the traditional topologies in the design of high voltage auxiliary power supply, a new design scheme of digital input and output high voltage auxiliary power is proposed. The principle of the program is analyzed, and the design parameters of the module such as the start-up circuit, the PWM control circuit, the flyback main circuit and the transformer of the auxiliary power supply of the microcontroller are comprehensively evaluated. Finally, using this scheme, an experimental circuit is designed. Simulation and experimental circuit test results show that the program to meet the design requirements.