Any one know why ESc's ( high current) are built with multiple MOSFETS and not just a couple of 50A jobs? Seems technically entirely feasible....
- posted
15 years ago
Any one know why ESc's ( high current) are built with multiple MOSFETS and not just a couple of 50A jobs? Seems technically entirely feasible....
Generally cost/performance is better with a lot of smaller ones.
You ned 6 anyway to do the three phases..sometmes its easier if the bulk of your sales are 25A ones and 25A ones ae cheap and low resitance,to bang in 12 of what you buy in bulk, rather than order 6 specials.
Just had a thought...maybe they have a single PCB, with options to add more mosfets to increase the current rating... That would make good commercial sense. Thanks.
It takes 2 to 3 times as many P-Channel fets as it does N-channel fets to achieve the same RDSon. So, many speed controls use 12 fets in total. (9) P-channel and (3) N-channel.
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