SMPS Part 2 (EDPS-190AP) Inrush Current Protection Relay, With Schematic
The inrush current of the switching power supply refers to the peak current flowing into the power supply equipment at the instant the power is turned on. Since the input filter capacitor of the charger quickly charges, the peak current is much larger than the steady-state input current. The power supply should limit the surge levels that AC switches, rectifier bridges, fuses, and EMI filter devices can withstand. Switching the loop repeatedly, the AC input voltage should not damage the power supply or causes the fuse to blow.
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PFC Section Video part 1 :-