I designed a heat sink for the first time. I am not sure if it is over designed or a well designed one?
I use IRFP460 in a two-switch forward converter. The maximum power of the converter is 1000 watts and the efficiency is 90 %. Each MOSFET dissipates 50 Watt. The maximum dissipation rating of the MOSFET is 280 Watts and the maximum Tj is 145 degree centigrade in its operating point. For the ambient temperature of 45 degree and the thermal resistance of the Tjc+Tcs=0.7 the maximum thermal resistance of the Tsa=1.3.
By the below link I need a heat sink with the below characteristics:
- height 4 cm
- width 6 cm
- length 6 cm
- 10 fins; 2 mm thickness
- 1 lit/sec fan
Is there any body to verify my design?