PROTECTION CIRCUIT, SWITCH CONTROL CIRCUIT, AND POWER SUPPLY DEVICE COMPRSING THESE

摘要

Embodiments of the present invention relate to a protection circuit, a switch control circuit, and a power supply device comprising the same. The protection circuit comprises a detection circuit for generating detection voltage increased by variation of comparison voltage; a gate to which the detection voltage is input; an anode electrically connected to power voltage; a cathode connected to predetermined reference voltage; and an SCR to be turned on in response to an input of the gate and to be turned off if no current flows to the anode.