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These "Big" Mosfets are ones that I have on hand. Just wanted to do some comparisons and learn more about compatibility.
Correct me if I'm wrong, but Mosfets with a lower on resistence value translates into more voltage at the motor leads with less heat buildup in the ESC.
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I see.
Rg and RDS(On) are not the same. RDS(On) directly related to voltage drop across FET.
You cannot tell how good FET is based on RDS(On) you need to check dynamic parameters the ones with "ns" units. Transition time from off/on will determine how efficient switching happen, less time better. Later we can cover why too fast is also not good.
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I took my Quark 80 back out of the case to investigate the driver fets and their ratings. They are sandwiched between the power board and the brain board. I can't get a good look at them. I'm hoping to catch Zeropointbug and ask him for a closeup view of the brain board that he has already disassembled.
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Unsoldering, unsoldering and picture might not be enough...probing and digging layout.
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Is it possible to use a Quark brain board from an ESC that's rated for 2 to 6 Lipo cells and adapt it to a larger capacity power board for a 10 or 12 lipo cell rating?
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Over 25V opto-coupling or other technique will require to isolate from high-voltage switching problems. So, probably won't work.