Converter and power conversion device using same

A converter that converts an AC voltage supplied to an input terminal into first to third DC voltages and outputs the first to third DC voltages respectively to first to third output terminals, the converter comprising:

• a first diode having an anode and a cathode connected respectively to the input terminal and the first output terminal;
• a second diode having an anode and a cathode connected respectively to the second output terminal and the input terminal;
• a first transistor connected between the first output terminal and the input terminal;
• a second transistor connected between the input terminal and the second output terminal;
• and
• a first bidirectional switch connected between the input terminal and the third output terminal,
• the first DC voltage being higher than the second DC voltage, and the third DC voltage being an intermediate voltage between the first and second DC voltages,
• the first bidirectional switch including third to sixth diodes and a third transistor,
• the third and fourth diodes having anodes connected respectively to the input terminal and the third output terminal and cathodes connected together to a first electrode of the third transistor,
• the fifth and sixth diodes having cathodes connected respectively to the input terminal and the third output terminal and anodes connected together to a second electrode of the third transistor,
• each of the first diode, the second diode, and the third transistor being made of a wide bandgap semiconductor,
• each of the first transistor, the second transistor, and the third to sixth diodes being made of a semiconductor other than the wide bandgap semiconductor.