[GriffinRU]

Originally Posted by lutach

Artur,

What I was getting at is basically looking at the Tekin R1 controllers. They are small and pack a lot of FET for the space so if we were to make them a little bigger and add more FETs, would that make the FETs work less to produce the same power and thus having less or the same amount of heat? I own a Etti 200A controller and I ran it a few times. This controller is only rated for 5S lipos and I ran 5S on it and the controller didn't even get warm. This controller doesn't have a heat sink like most car controllers and I was surprised on how cool it was. My set up at the time only pulled 98A spikes, but I ran my truggy for 7 minutes. The one picture in my previous post shows a 6 power board controller that puts out a lot of AMPs. Something like that would be great for the surface side of the hobby.

Luciano,
From 50 fet's (300 total) to 8 fet's (48 total, Tekin R1PRO) your dynamic losses falling from ~20W to 3.2W, pcb can absorb that. Conduction loss at 100Amps @25C with 8 fet's ~2W -> as you can see great combo.
Dynamic losses are small with less fet's and becoming dominant with more, so balance should be found in-between on design stage. Where entire ESC been layout and verified step-by-step, you just cannot add fet's boards without penalty.