Tagged Questions
0
votes
2answers
118 views
how do you remove heat from a ceramic heat exchange heatsink
I have a ceramic heat exchange chip(10m x 10m). I know you are suppose to lay this on the chip, and lay a heatsink on top of that.
What is the best medium for connecting the heat exchange to the ...
14
votes
3answers
1k views
How do I determine the area of copper needed on a PCB to provide adequate heatsinking for a power SMD MOSFET?
I am planning to use the IRFR5305PBF Power MOSFET (http://www.irf.com/product-info/datasheets/data/irfr5305pbf.pdf) to switch on a load. I have determined that I need an external heatsink with Rthsa ...
5
votes
1answer
215 views
How to correctly apply thermal compound to ICs and heatsinks?
From http://en.wikipedia.org/wiki/Thermal_grease
All these compounds conduct heat far better than air, but far worse than metal. They are intended to fill gaps that would otherwise hold air, not ...
2
votes
2answers
561 views
Effective MOSFET cooling
We need to drive a motor with around 40 Amps. The mosfet has an Rdson of about 7 mohms at 90 degrees Celsius. That is a whopping 11.2Watts of heat generated on the poor mosfet.
We are very space ...
3
votes
3answers
332 views
Regulator cooling in a confined space
I've designed a simple PWM RGB LED slow fader to be used as a garden lighting effect. My circuit works great, but I under-estimated the amount of heat that is generated by the 7805 linear regulator.
...
6
votes
6answers
646 views
How do I keep PCBs cool when soldering?
I've noticed that when soldering small PCBs can get very hot. Since I haven't yet been able to find a good vise in which to hold PCBs, I mostly hold them in my hand and after several minutes of ...
