DRIVING DEVICE OF SEMICONDUCTOR ELEMENT AND ITS CONTROL METHOD

摘要

PROBLEM TO BE SOLVED: To provide a driving device and its control method for suppressing surge voltage generated in a means or in the case of conducting a current through a power semiconductor element.

SOLUTION: The driving device of the power semiconductor element conducting or interrupting the main current is provided with a first resistance variable means for changing a first resister in accordance with control voltage, and a second resistance variable means for changing a second resistor in accordance with voltage between first/second terminals. Either one of the voltage of a control power source or the voltage between the first/second terminals is divided by the first/second resistor. Additionally, the divided voltage is applied to a control gate terminal when the main current is conducted or interrupted.

COPYRIGHT: (C)2005,JPO&NCIPI