With the FGP3440G2_F085 directly driven by the arduino it works like a charm!
It's impressive! I get a nice spark with a dwell time as low as 1ms and even at high revs the mosfet stays cool! With 200 sparks a second I measured 29.9 °C without any heatsink!
Thanks a lot for your help!
Its not a MOSFET, its an IGBT.
The low saturation voltage of 1.1V at 6A will really help keep it cool too of course, and I guess the
average current is quite low at that duty cycle. Expect the heat dissipated to vary with the spark frequency.
Yes when the spark frequency increases the heat increases also, but even a high frequencies they are cool without any heatsink.