I'm currently selecting the MOSFETs for the design and would like to hear your opinions on whether the IRL1004 is a good match
The largest load will roughly be around 2.5-3Amps@12VDC - this will be the motor, driving the awning for the houses. I don't think it will run for longer than 15-30 seconds at a time.
This Power MOSFET is in a TO-220 package, has a R DS (on) = 0.009 Ohm with a V GS = 4.5V (it is a logic level MOSFET) and according to my calculations should have no problems whatsoever handling the task it will be performing (and I'll more or less be wasting its potential on the sub Amp loads - valves, etc.). I used P = I (of the load)^2 * R DS (on) .
The only thing that puzzles me is that there are two Power Dissipation figures mentioned in the sheet - one is approx. 50W (for the TO-220 package, in the beginning of the datasheet) and the other is 200W as a Maximum rating for the FET. Shouldn't these be closer to each other?
I'm attaching the component's datasheet and would be greatful to hear your opinions. I will, of course, be running practical tests prior to ordering in quantities, but nevertheless - better safe than sorry
Thanks again in advance!