Patent ID: 11929666
Assignee: MITSUBISHI ELECTRIC CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 12:
13. The gate drive circuit according to claim 10 or 11, further comprising a voltage control circuit to change an output voltage of the first drive circuit to a low level and change an output voltage of the second drive circuit to a high level when a voltage at the power supply node becomes less than or equal to a specified value, the output voltage of the first drive circuit is at the high level, and the output voltage of the second drive circuit is at the low level, wherein
the controller keeps the P-channel MOSFET in the OFF state only for a specified time when the magnitude of the current indicated by the detection signal exceeds the threshold, and
the specified time is set so as to prevent the voltage at the power supply node from becoming less than or equal to the specified value after a lapse of the specified time.