If you only want standard features, why not just buy one off the shelf?
Ok, fair enough.Well, I'm hobbyist.
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I want to make it myself.
I'm using MOSFETs IRLB4030PBF (Digikey part: IRLB4030PBF-ND) 100 V, 180 A, 4.3 m Ohm. I have a moderate size heatsink with fan on it and made PCB tracks of enough sizes to accommodate the maximum current demand by adding solder paste layer on top of both sides where applicable. Not shown here I will also scratch a big PCB rectangle solder masks just beneath heatsink base on both sides to add solder paste and then an insulator between top side and heatsink. It was by default on Altium PCB soft copy but may be you not see in actual board as I drew solder paste "polygon" for that and so did not appeared in PCB manufacturing (see attachment here for clarification). Just a wise guess, other than that no calculation performed to know power dissipation yet.what calcs have you performed for the power and dissipation in each mosfet ? Is there a fan on the heatsink ?
Not even decided yet however it must be above 60 Vmax and 50 Amax while keeping in safe operating area.Please do let us know what current and voltage you were intending to run the fets at ... ?
No not at all. I just means by saying this that upper limits must be 60 V or 50 A but not both at the same time. As an example 1 V x 50 A = 50 W, 30 V x 3 A = 90 W 60 V x 1 A = 60 W etc. I mentioned to keep in safe operating area but you took it wrong.Not even decided yet however it must be above 60 Vmax and 50 Amax while keeping in safe operating area.
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