Power source apparatus

A power source apparatus comprising:

• a first converter having a first reactor connected to a power source, a first switching element, and a first rectifying element;
• parallel converters each having the same configuration as the first converter and connected in parallel with the first converter, the number of the parallel converters being at least one;
• an output capacitor connected to output ends of the first and parallel converters;
• a current detecting resistor configured to detect a resultant current of currents passing through the first switching element and the switching elements of the parallel converters;
• a controller connected to the first and parallel converters and configured to output a first drive signal for driving the first switching element of the first converter and drive signals for driving the switching elements of the parallel converters;
• and
• a deactivate unit configured to, in a case where the resultant current indicates a first value:
• if a plurality of the drive signals for the switching elements of the first and parallel converters are active, deactivate the active drive signals;
• and
• if the drive signals for the switching elements of the first and parallel converters are active, deactivate at least one of the active drive signals that is active longer than the other active drive signals.