Patent ID: 6703874
Filing Date: 2004-03-09
Classification: H02M,H03K

Abstract:
A gate driver for controlling a gate voltage of each of a plurality of MOS control semiconductor devices of a semiconductor power converter in which said MOS control semiconductor devices are connected in series with each other, said gate driver comprising:a power supply line having a higher potential than a gate potential on each of said MOS control semiconductor devices when each of said MOS control semiconductor devices is in a steady ON state; and means for supplying a current from the power source line to the gate of each of said MOS control semiconductor devices so as to increase the gate voltage of each of said MOS control semiconductor devices when a potential difference between said power supply line and an emitter of each of said MOS control semiconductor devices is constant and when a collector voltage of each of said MOS control semiconductor devices exceeds a predetermined value under ON state of said MOS control semiconductor devices.