Quote:
Originally Posted by Five-oh-joe
Well, I would think that the more surface area you have to dissipate a set amount of wattage, the better. More FETs translates into more surface area to handle the same wattage (heat we need to dissipate). But with that said...
The only thing I would be conecerned with is if there would be some sort of inefficiency with driving that many FETs? I mean, each FET is only efficient to a certain point, and what about switching losses? More FETs means more wattage lost due to switching loss no?
Interesting problem posed lutach. I'm going to keep an eye on this thread to see what the general concesus is from Patrick and Artur (and anyone else who's an EE- which I am not).
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I've seen some DC/DC converter that was small and packed a lot of FETs. This was in one of the many electronic magazines I receive and the company was claiming they don't require a heat sink. They were saying something about a dense PCB, which in my point of view means a lot of components placed as close as possible. The Tekin R1pro for example, packs a lot of FET in a small package. That's why I'm asking this question with the switching part covered. I would think the more the FETs, the less heat will be generated to make a certain amount of power. I attached a couple of pics that shows some controllers that are proven to be really powerful and here is a link of another one
http://www.rc-monster.com/forum/show...6&postcount=16.