Power supply apparatus for endoscope

A power supply apparatus for supplying power to an endoscope comprising a plurality of electronic parts for which a power-on sequence is defined, the power supply apparatus comprising:

• a plurality of power supply circuits configured to generate a plurality of drive voltages required to drive each of the plurality of electronic parts;
• a plurality of power changeover switches provided in each of a plurality of power supply lines individually connecting the plurality of electronic parts and the plurality of power supply circuits;
• and
• a power control circuit configured to control the plurality of power supply circuits and the plurality of power changeover switches,
• wherein the power control circuit is configured to perform a first operation and a second operation for each of the plurality of electronic parts in the power-on sequence defined,
• wherein in the first operation, the power control circuit is configured to determine, when one power changeover switch provided on one power supply line connecting one power supply circuit of the plurality of power supply circuits and one electronic part of the plurality of electronic parts is set to off, whether an output voltage of the one power supply circuit is normal or not, and
• wherein in the second operation, the power control circuit is configured to:
• in response to determining that the output voltage of the one power supply circuit is normal, and with the one power changeover switch being set to off, control to temporarily stop power output from the one power supply circuit to the one power supply line;
• control, with power output from the one power supply circuit being temporarily stopped, to switch the one power changeover switch from off to on;
• and
• perform, when the one power changeover switch is controlled to switch from off to on, control to start a supply of one drive voltage required to drive the one electronic part from the power supply circuit.