iceblu3710
Member level 3
I found an interesting HEXFET at the market and just started poking around on digikey and apparently I missed something in the world of semiconductors!
I had no idea their where MOSFETS out there with an Rds(ON) of <5mOhm. That and theirs a strange DirectFet Isometric package I have never seen before. I found some 100V, 180A FETS with a Rds of 3.2mOhm, at full bore that FET only drops 100W of power which is phenomenal.
It got me thinking that I should re-design my high current PSU to use much more efficient parts as right now its driving a 1HP DC motor and its a space heater at only 14A.
The issue I see now is the conversion of AC to DC using a bridge rectifier. with a 1V diode drop at 180A (x4) your rectifier is producing 720W of heat which is ridiculous. If you had the ability to use these new MOSFETS you could cut wasted power down to 400W.
Are their any rectification solutions out there that I missed the boat on or any other ideas to help reduce heat before I get designing?
Thanks!
I had no idea their where MOSFETS out there with an Rds(ON) of <5mOhm. That and theirs a strange DirectFet Isometric package I have never seen before. I found some 100V, 180A FETS with a Rds of 3.2mOhm, at full bore that FET only drops 100W of power which is phenomenal.
It got me thinking that I should re-design my high current PSU to use much more efficient parts as right now its driving a 1HP DC motor and its a space heater at only 14A.
The issue I see now is the conversion of AC to DC using a bridge rectifier. with a 1V diode drop at 180A (x4) your rectifier is producing 720W of heat which is ridiculous. If you had the ability to use these new MOSFETS you could cut wasted power down to 400W.
Are their any rectification solutions out there that I missed the boat on or any other ideas to help reduce heat before I get designing?
Thanks!