Drive circuit and inverter device

An inverter device comprising:

• an inverter circuit including an upper arm and a lower arm;
• a drive circuit;
• and
• a first power supply connected between a connection point of the upper arm and the lower arm and the drive circuit,
• wherein the drive circuit includes
• a first driver configured to be supplied with the first power supply and control on/off of the upper arm,
• a second driver configured to be supplied with a second power supply and control on/off of the lower arm,
• a first switching device including a first terminal, a second terminal and a control terminal configured to control on/off between the first terminal and the second terminal, the first terminal of which is connected with the first power supply, and the second terminal of which is connected with the second power supply,
• a booster circuit configured to turn on the first switching device by boosting a control signal which is at a high level when the lower arm is in an on state and is at a low level when the lower arm is in an off state and performing supply to the control terminal,
• a second switching device connected between the control terminal and the booster circuit, and configured to cause continuity between the control terminal and the booster circuit when the control signal is at the high level and cause interruption between the control terminal and the booster circuit when the control signal is at the low level, and
• a first switch unit configured to cause interruption between the control terminal and a terminal for grounding when the control signal is at the high level and short-circuit the control terminal and the terminal for grounding when the control signal is at the low level, and
• a current flows from the second power supply to the first power supply when the first switching device is turned on, and the first power supply is charged.