关键词: 交流模块电源, 浪涌电流

Abstract: In the design of AC module power supply circuit, a circuit scheme suitable for precise control of AC input inrush current is proposed. This scheme effectively addresses the issue where, due to the large capacitance of the input filter capacitor, an inrush current several to tens of times the normal operating current is generated at the input during startup of the AC module power supply. In this design, the conduction impedance of MOS transistor is ingeniously utilized to solve the problem that the AC input surge current is too large, it plays an effective role in restraining the surge current of AC module power supply, provides reliable guarantee for the design of AC module power supply, effectively protects the front-end rectifier and the safety device, and extends product lifespan.

Key words: AC module power supply, surge current