| 摘要 |
A drive device for controlling a power switch element (200) is provided with an ON-side circuit (110) for performing an ON operation on the power switch element, and an OFF-side circuit (120) for performing an OFF operation. The ON- or OFF-side circuit has a plurality of main MOS transistors (Tr10-Tr15, Tr50-Tr55), a sensing MOS transistor (TR20, Tr60) for defining a drain current of the main MOS transistors, a sensing current control circuit (SC) for controlling the drain current of the sensing MOS transistor so that the drain current is constant, and a switching circuit (SW) connected to the gates of the main MOS transistors, the switching circuit switching a gate current of the power switching element by controlling the main MOS transistors to be ON or OFF. |
