PS: that is why i am still considering mineral oil as an option. It is bit messy but it is just nonesence for me to pay 10+USd for a pice of metal
Remember up to 3 W/chip isnt that much, a passive cooled heatsink something in the range of 1 °C/W is more than enough, and with a fan everthing should be cool as ice.
calc:
- 10 chips ~ 30 W
- ambiance Temp ~ 20°C
= 50° C without a fan and it will be lesser with a fan.
I will make a FEM simulation with a profile heatsink, and publish the result.
I know Knecke .
But such a heatsink with 1 °C/W is tick and expensive about 20 USD for 10x10 board. Make calculations for 100+ boards. I will be glad to see your caclcs and if you can post some links to cheapest one which will do the trick for 10x10 board
PS. I am in EU a link to Eu site is mostly welcomed