DRIVE METHOD OF SEMICONDUCTOR SWITCHING ELEMENT AND POWER SOURCE DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a drive method of a semiconductor switching element for preventing large reverse current even during the start or the failure of a converter and suppressing the voltage change on the load. SOLUTION: A first control signal corresponding to a difference between output voltage or output current and a first reference is given to the semiconductor switching element during the start of a power source device. At or after the time point when the output voltage or the output current reaches a second reference the same on larger than the first reference, a second control signal larger than the first control signal is given to the semiconductor switching element.