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Reply To: | TechNet Mail Forum. |
Date: | Tue, 11 Nov 1997 08:54:21 -0800 |
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Ralph Hersey wrote:
>
> A formula for generating the chart was recently presented at IPCWorks
> '97 "Emperical equation for sizing copper PWB traces" by John McHardy
> and Mehendra Gandhi, Hughes Aircraft, technical paper SO6-2-1, and is in
> the form of I = k (T^0.44) (A^0.725)
>
> Where:
> I is current in amps.
> k is a constant = 0.048 for "external", and 0.024 for
> "internal" conductive patterns.
>
>
Ralph:
What is T? What is A?
--
/\ Praegitzer Design
/\/\ A Division of Praegitzer Industries, Inc.
/\/\/\ Portland Design Center
/\/\/\/\ 7245 NW Evergreen Pkwy. #100
---------- Hillsboro, OR 97124
George Patrick, Sr. PCB Designer Email: [log in to unmask]
Voice: (503) 531-2050 ext. 1813 Fax: (503) 531-2051
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