Patent ID: 8604841

Claim:
An apparatus comprising: two or more parallel or series connected electrical switching devices, each switching device having a control terminal, and at least one intelligent gate driver unit including: a control output connected to the control terminal of one of the switching devices; a first receiving component configured to receive turn-on and turn-off commands for the switching device; a second receiving component configured to receive feedback information on turn-on and turn-off events of the switching device; a third receiving component configured to receive reference information on turn-on and turn-off events of one of the other switching devices; a first calculating component configured to calculate a value for a control parameter on the basis of the feedback information and the reference information; and a first controlling component configured to control, based on a switching device command and the control parameter, a control signal at the control output to control the switching device, wherein two or more of the intelligent gate driver units form a daisy chain configured to pass reference information from one gate driver unit to another.