Gate driver circuit and multiphase intelligent power module

A multiphase intelligent power module, comprising a power supply, a first switch unit, at least two first drive units, and a second drive unit corresponding to each first drive unit;

• the first switch unit is connected in series with a first capacitor and a second capacitor;
• and when the first switch unit is closed, the power supply is used for charging the first capacitor and the second capacitor;
• the first drive unit comprises a first buffer, a first power transistor, the first capacitor and the second capacity;
• and an output end of the first buffer is connected with the gate of the first power transistor;
• the first capacitor is configured to increase the gate voltage of the first power transistor when the first buffer drives the first power transistor to an on state, so that the first power transistor is turned on;
• the second capacitor is configured to provide a negative turn-off voltage for the first power transistor when the first buffer drives the first power transistor to an off state, so that the first power transistor is turned off;
• the second drive unit comprises a second buffer and a second power transistor;
• and an output end of the second buffer is connected with the gate of the second power transistor;
• and a high-voltage end of the second buffer is connected with the positive electrode of the power supply;
• the source of the second power transistor is connected with a ground;
• and the source of the first power transistor is connected with the drain of the second power transistor and
• the multiphase intelligent power module further comprises a controller for controlling the opening and closing of the first switch unit.