Gate driving device

A gate driving device for driving a gate of a transistor, the gate driving device comprising:

• a gate driver circuit that includes a first transistor of a first conductivity type, a second transistor of a second conductivity type, a first charge transistor, a first negative-bias transistor, a diode alternate transistor, a drive transistor, and a logic circuit;
• and
• a first capacitor provided outside,
• wherein the first transistor and the second transistor operate complementarily, are connected in series between a first node and a second node, and have a connection node serving as an output node of the gate driving device, the first node being a node to which a first voltage is applied, the second node being a node to which a second voltage lower than the first voltage is applied,
• the first charge transistor and the first negative-bias transistor are connected in series between the first node and a third node and have a connection node connected to a capacitance node, the third node being a node to which a third voltage lower than the first voltage and higher than the second voltage is applied, the capacitance node being connected to one electrode of the first capacitor,
• the diode alternate transistor is connected between the second node and the third node,
• the drive transistor drives a gate of the diode alternate transistor, and
• the logic circuit controls the first transistor, the second transistor, the first charge transistor, the first negative-bias transistor, and the drive transistor.