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Thermal Analysis

 

The old MIL-STD-275E spec page 34 and 36 has charts in it that give you a guide that is de-rated based on the Military standards. http://www.dscc.dla.mil/Downloads/MilSpec/Docs/MIL-STD-275/std275.pdf

 

The IPC has the same charts in IPC2221 page 38.

 

According to what I have heard, these charts are approximately 50% de-rated... and based upon phenolic material. There is some impressive work being done by Mike Jouppi, "Thermalman", that gives more realistic numbers to a thermal design. http://www.thermalman.com/

 

Also he gives an explanation of the history of the Mil-Std-275 Current Carrying charts on his website at

http://www.thermalman.com/9.shtml

 

 

If you want to use a free online calculator there's one developed by Brad Suppanz at http://www.geocities.com/CapeCanaveral/Lab/9643/TraceWidth.htm


Also, a good book on Thermal is "Cooling Techniques for Electronic Equipment, Second Edition" by Dave S. Steinburg pub 1991 by John Wiley and Sons, Inc. ISBN 0-471-52451-4

 

Also there is a publication called "Electronics Cooling" online at http://www.electronics-cooling.com/html/articles.html

 

Of course the heat sink manufacturers are very helpful to get more info on thermal designs - http://www.aavidthermalloy.com/technical/index.shtml

 

Thermal Interface materials

http://www.bergquistcompany.com/

http://www.electronics-cooling.com/Resources/EC_Articles/SEP96/sep96_01.htm

http://www.amd.com/us-en/assets/content_type/white_papers_and_tech_docs/26951.pdf

http://www.lairdtech.com/pages/products/Thermal-Interface-Materials.asp

http://www.icepak.com/prod/icepak/solutions/articles/iceart10.htm

http://www.coolermaster.com/index.php?LT=english&Language_s=2&url_place=discovery_detail&serial=56

 

 

 

 

 


[*]International Rectifier Thermal Application notes

     
[*]Surface Mount Technology" September 1993 by Jeffrey G. Holmes, Motorola, Phoenix, AZ 
     
[*]LM317 Data Sheet thermal graphs

     
 

490008 Temp Profile  8MHz

0

20

40

60

80

100

120

140

0

5

10

15

20

25

time (min)

temp (C)

490008 Temp Rise

 

 

 

 

 

 

"What is the difference between Mechanical Engineers and Civil Engineers?

Mechanical Engineers build weapons and Civil Engineers build targets."

 

 
  
 

 

 

 
 


 

 
 

 

 

 

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