MATCHING GATE DRIVE CIRCUITS TO FETS AND IGBTS

摘要

A variety of considerations go into the design and selection of a gate-drive circuit. For typical inductive load applications, one important factor is that the delay matching between the high and low side drivers. Better delay matching means higher performance current-loop because less deadtime is necessary. The high-side driver can be powered most conveniently by the bootstrap method for most applications. Finally, the proper values of RG depend on the desired switching speed, and on the turn-on gate threshold of the transistor.