CROSS-REFERENCE TO RELATED APPLICATION

The present application claims priority to and the benefit of Japanese Patent Application No. 2019-088611 filed May 8, 2019, the entire contents of which are incorporated herein by reference.

TECHNICAL FIELD

The present disclosure relates to an overvoltage protection circuit and a power supply apparatus.

BACKGROUND

A known power supply apparatus includes an overvoltage protection circuit that suspends output upon entering an overvoltage state in which the output voltage exceeds a predetermined reference value. For example, see patent literature (PTL) 1.

CITATION LIST

Patent Literature

PTL 1: JP2000184703A

SUMMARY

An overvoltage protection circuit according to an embodiment includes an error amplifier configured to output a first command voltage for bringing an output voltage of a converter closer to a first set voltage and an overvoltage detection circuit configured to output a second command voltage for bringing the output voltage of the converter closer to a second set voltage higher than the first set voltage. The overvoltage protection circuit controls the converter based on the first command voltage and the second command voltage.

A power supply apparatus according to an embodiment includes the aforementioned overvoltage protection circuit.

