#### Lord_grezington

- May 3, 2013

- 124

- Joined
- May 3, 2013

- Messages
- 124

I am hoping to use this Mosfet http://www.farnell.com/datasheets/51964.pdf

The Specs are as follows:

Max Current = 61A (38.5A @ 100 degrees)

Max Voltage = 200V

Rds(on) - 0.044 Ohms

Max Power dissipation = 417W (3.3W/degree for derivative above 25 degrees)

Now, I want to draw around 30A (below max current @ 100 degrees) nearly continuously, , so are the calculations below correct?

Max temperature needs to be around 80 degrees, so: (80 - 25) x 3.3 = 181.5W max power dissipation.

Power dissipation is (30 x 30) x 0.044 = 39.6W (which is below Max)

I will only be taking around 48V through the Mosfet, I will also be driving the Mosfet through a driver with a Vgs of 15V to keep losses to a minimum. I will also me running it from 100Khz.

Will this work? if not where am I going wrong?

Thanks