I would like to use the TC4427 MOSFET driver chip, in order to switch the current through the IGBT AUIRG4PH50S, which will be placed in series with a resistive load. The power supply providing the main current through the load will be around 1V, and 100A. Another detail is that I would like to have up to x8 IGBTs (each with their own TC4427) - in parallel, to handle higher total currents through the main load. All x8 of these IGBTs will then be switched at the same time. The load will be being switched only around once per second.
The TC4427 will drive the gate of the IGBT up to +15V when "on", and so I need to choose a +15V supply to power the VDD pin of the TC4427. To isolate the supply from other parts of the circuit, I would like this +15V supply to be an isolating DCDC converter (this DCDC converter power supply is seperate to the one providing the main current through the load, although they share the same ground.)
My question is how to choose the power capability of this DCDC converter in Watts? The datasheet for the TC4427 says peak output current of 1.5A - does this mean that during the switching process the +15V DCDC converter will need to provide P = (1.5A x 15V) = 22.5W for each IGBT? Or would I have to somehow calculate the actual current output by the driver based on the gate capacitance of this particular model of IGBT?
I am looking at something like the XP Power JSM1012S15 (10W, 670mA output), but I am not sure either whether this will be sufficient, or will be completely overkill for this application. Datasheet is here: https://www.xppower.com/fr/Product/JSM10-Series
Any guidance on how to go about calculating these things would be great.
edit: I later found a useful reference for a breakdown of the various power consumptions of a MOSFET driver: Avoiding MOSFET Driver Overstress http://ww1.microchip.com/downloads/en/AppNotes/01327A.pdf