Converter device and power supply device

A converter device comprising:

• a plurality of converters;
• a voltage detector;
• a temperature detector;
• and
• a controller,
• wherein the plurality of converters are connected in series or in parallel,
• wherein each of the plurality of converters includes at least one switch element configured to be controlled according to a drive signal,
• wherein the voltage detector is configured to detect information about an output voltage of a converter circuit unit in which the plurality of converters are connected,
• wherein the temperature detector is configured to detect information about temperatures of one or more of semiconductor elements including the switch element in each of the plurality of converters, and
• wherein the controller is configured to control the drive signal for the switch element in each converter so that temperatures of semiconductor elements having highest temperatures in the plurality of converters are closed to each other on the basis of detection results of the voltage detector and detection results of the temperature detector.