Patent ID: 8723564

Claim:
A driving circuit to drive a semiconductor device that opens and closes a current by applying a voltage directly or indirectly supplied from a driving power supply to a control terminal of the semiconductor device, the driving circuit comprising: a first semiconductor device that is a semiconductor switch having a function to open and close at least a current in one direction; a second semiconductor device including a semiconductor switch having a function to open and close at least a current in one direction or including a rectifying device; a third semiconductor device that is a semiconductor switch having a function to open and close at least a current in one direction; a fourth semiconductor device that is a semiconductor switch having a function to open and close at least a current in one direction; a fifth semiconductor device including a semiconductor switch having a function to open and close at least a current in one direction or including a rectifying device; a sixth semiconductor device including a semiconductor device having a function to open and close a current in one direction or including a rectifying device; and an electricity storage portion having an electricity storage function, wherein one output terminal of the driving power supply is coupled to one current opening-and-closing terminal of the semiconductor device, the first semiconductor device is coupled to be disposed between an other output terminal of the driving power supply and an intermediate node, the fifth semiconductor device is coupled to be disposed between one terminal of the electricity storage portion and the intermediate node, the second semiconductor device is coupled to be disposed between the control terminal and the intermediate node, the third semiconductor device is coupled to be disposed between the one output terminal of the driving power supply and the one terminal of the electricity storage portion, the fourth semiconductor device is coupled to be disposed between an other terminal of the electricity storage portion and the control terminal, the sixth semiconductor device is coupled to be disposed between the other terminal of the electricity storage portion and the one output terminal of the driving power supply, a first state and a second state are provided in one cycle in which a voltage is applied to the semiconductor device, in the first state, the first semiconductor device is closed, the third semiconductor device and the fourth semiconductor device are opened, and when the second semiconductor device includes the semiconductor switch, the semiconductor switch is closed, and in the second state, the first semiconductor device is opened, and the third semiconductor device and the fourth semiconductor device are closed.