Patent ID: 6978098

Claim:
A power supply control apparatus comprising: an active filter having an output condenser configured to build up an electric charge while the output condenser is energized, the active filter being configured to convert an AC voltage supplied from an AC power supply to a DC voltage; a first DC-DC converter configured to convert the DC voltage converted by said active filter to voltages at predetermined levels, and to supply the DC voltage, which is converted by said active filter to voltages at predetermined levels, to a load; a second DC-DC converter configured to convert the DC voltage converted by said active filter to voltages at predetermined levels, and to supply the DC voltage, which is converted by said active filter to voltages at predetermined levels, to a load control unit; a power supply control unit configured to control operation of said first DC-DC converter and said second DC-DC converter, wherein the power supply control unit shuts off a supply of the DC voltage to said first DC-DC converter, and preferentially supplies said electric charge to said second DC-DC converter over said first DC-DC converter.