Power-converting device and power conditioner using the same

A power-converting device, comprising:

• a first conversion circuit;
• a second conversion circuit;
• a first bidirectional switch;
• and
• a second bidirectional switch, wherein
• the first conversion circuit and the second conversion circuit are electrically connected in parallel with each other between a first input point on a high potential side of a direct current power supply and a second input point on a low potential side of the direct current power supply,
• the first conversion circuit includes
• first to fourth switching elements electrically connected in series with each other between the first input point and the second input point in an order of the first switching element, the second switching element, the third switching element, and the fourth switching element from the first input point, and
• a first capacitor electrically connected in parallel with a series circuit of the second switching element and the third switching element,
• a connection point of the second switching element and the third switching element being a first output point,
• the second conversion circuit includes
• fifth to eighth switching elements electrically connected in series with each other between the first input point and the second input point in an order of the fifth switching element, the sixth switching element, the seventh switching element, and the eighth switching element from the first input point, and
• a second capacitor electrically connected in parallel with a series circuit of the sixth switching element and the seventh switching element,
• a connection point of the sixth switching element and the seventh switching element being a second output point,
• the first bidirectional switch is electrically connected between a first connection point which is a connection point of the first switching element and the second switching element and a second connection point which is a connection point of the seventh switching element and the eighth switching element,
• the second bidirectional switch is electrically connected between a third connection point which is a connection point of the third switching element and the fourth switching element and a fourth connection point which is a connection point of the fifth switching element and the sixth switching element, and
• the power-converting device is configured to generate an output voltage between the first output point and the second output point.