Most of those heatsinks, with fan, will dissipate much more than 100W depending on how hot you want your parts to get.
For example, some modern CPUs will dissipate 70W into a heatsink that size.
I have used an early pentium heatsink with fan for a 120W amplifier channel and it worked well. The only thing is that you overheat if the fan isn't running.
For example, some modern CPUs will dissipate 70W into a heatsink that size.
I have used an early pentium heatsink with fan for a 120W amplifier channel and it worked well. The only thing is that you overheat if the fan isn't running.
Hi,
some of the bigger fanned sinks achieve Rths-a around 0.3C/W.
Removing the fan will reduce dissipation by at least a factor of ten.
If we assume 3C/W then the sink will run at 30Cdegrees above ambient when dissipating 10W.
What is your maximum ambient?
What insulator are you using between device and sink?
What maximum case temperature can you tolerate long term and short term?
Yes, it is feasible, but you have a lot of calculating and measuring to do. Are you up to it? Seems you avoid work so far.
I have used a CPU cooler to keep power amp driver transistors cool. The main sink heated the drivers rather than cooling them.
some of the bigger fanned sinks achieve Rths-a around 0.3C/W.
Removing the fan will reduce dissipation by at least a factor of ten.
If we assume 3C/W then the sink will run at 30Cdegrees above ambient when dissipating 10W.
What is your maximum ambient?
What insulator are you using between device and sink?
What maximum case temperature can you tolerate long term and short term?
Yes, it is feasible, but you have a lot of calculating and measuring to do. Are you up to it? Seems you avoid work so far.
I have used a CPU cooler to keep power amp driver transistors cool. The main sink heated the drivers rather than cooling them.
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