Heat sinking multiple Mosfets

Hi

How to determine how much heat sinking is required for multiple mosfets?? if I know how much power each one dissipates. I know how much heat sinking I need for one.

These mosfets are mounted on a Bus bar, which acts as a heat sink.

Thanks

consult datasheet for powe dissipation

A same thread was started few days ago.....
https://www.edaboard.com/threads/235044/...
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If you could find the power dissipation by the MOSFET, then u can use the following formula...
T =T (amb)+P (disp.)x[θ(j-c) + θ(disp.)]
Where,
T (amb)= Environmental temperature. ~40°C
P (disp.)=Power dissipated by the MOSFET (Potential drop across the FET x current drawn)
θ(j-c)= Junction to case thermal resistance. (Check your transistor's datasheet)
θ(disp.)= Heatsink thermal resistance This have to be choosen by you. Use as lower as 3°C/W)

If the temp comes under 100°C, it is safe...

---------- Post added at 15:52 ---------- Previous post was at 15:51 ----------

A same thread was started few days ago.....
https://www.edaboard.com/threads/235044/...
.
.
.
If you could find the power dissipation by the MOSFET, then u can use the following formula...
T =T (amb)+P (disp.)x[θ(j-c) + θ(disp.)]
Where,
T (amb)= Environmental temperature. ~40°C
P (disp.)=Power dissipated by the MOSFET (Potential drop across the FET x current drawn)
θ(j-c)= Junction to case thermal resistance. (Check your transistor's datasheet)
θ(disp.)= Heatsink thermal resistance This have to be choosen by you. Use as lower as 3°C/W)

If the temp comes under 100°C, it is safe...