POWER SUPPLY SYSTEM, POWER SUPPLY SYSTEM CONTROL METHOD, AND CIRCUIT BOARD

A power supply system includes a first circuit board mounting a power source circuit and an electronic fuse and a second circuit board mounting a power consumption circuit and a switch. When the electronic fuse detects an overcurrent due to a failure occurring in the power consumption circuit, the power supply system immediately cuts out an overcurrent flowing through the power consumption circuit while changing the switch from an open state to a short-circuited state according to a fault signal output from the electronic fuse. Accordingly, it is possible to safely separate the first circuit board and the second circuit board, and therefore it is possible to replace the second circuit board with another circuit board mounting a normal power consumption circuit.