Patent ID: 9450517
Filing Date: 2016-09-20
CPC Classification: H02M,H03K

Claim Text:
1. A driving apparatus that drives a switching element including a control terminal, the driving apparatus comprising: a first potential line that applies a first potential; a second potential line that applies a second potential lower than the first potential; a coil including a first terminal and a second terminal, the second terminal being connected to the control terminal of the switching element; a charging switch, connected between the first potential line and the first terminal of the coil, to turn on or off an electrical connection between the first potential line and the coil; a clamp switch, connected between the first potential line and the control terminal of the switching element, to turn on or off an electrical connection between the first potential line and the control terminal of the switching element; a charging diode, connected between the second potential line and the first terminal of the coil, to pass current from the second potential line to the first terminal of the coil; and a control circuit that outputs a charging control signal for turning on or off the charging switch and a clamp control signal for turning on or off the clamp switch, wherein the charging control signal turns on the charging switch, and then turns off the charging switch before a potential of the control terminal of the switching element reaches the first potential, and the clamp control signal turns on the clamp switch after the charging switch is turned on.