Jack -
I was planning on replying sooner, since I made the recent post of the article, but followed the principle of never do today what you can put off until Monday. ;-D
I did a similar search about 3 years ago and found that the article I posted the reference to is the clearest and most recent.Even though it is now 10+ years old the physics haven't changed. Through experimentation I have discovered that it is much harder to burn a trace off a board then most believe, and to do so quickly (microseconds at peak load) is even harder. The calculations in Doug Brooks' article show the same thing.
Please share your findings, even if they are not included in the specifications
Thanks,
Jeffrey A McGlaughlin, CID
Engineering Designer
Battelle
505 King Ave
Columbus Ohio 43201-2693
Phone (614)424-7582
________________________________
From: DesignerCouncil [mailto:[log in to unmask]] On Behalf Of Jack Olson
Sent: Friday, April 24, 2009 4:14 PM
To: [log in to unmask]
Subject: Re: [DC] Is Fusing Current Current?
wow.
Not even one reply?
Not even one additional reference?
Is this a subject no one has to deal with?
I'm SO disappointed....
tsk, tsk, tsk,
Well, I suppose I should just go home.
seeya Monday!
Jack
On Wed, Apr 22, 2009 at 10:07 AM, Jack Olson <[log in to unmask]<mailto:[log in to unmask]>> wrote:
Greetings all you lurkers...
Hey, I noticed someone over on TechNet was asking about fusing current,
which prompted me to re-read Doug Brooks extremely valuable 1998 article
on the subject
http://www.ultracad.com/articles/fusing.pdf
I just realized that this topic would be a perfect addition to the new IPC-2152
"Standard for Determining Current-Carrying Capacity in Printed Board Design",
and as long as I can put something together by May 1st, I can probably insert
it before its too late.
So my question is, does anyone else have any sources for this subject?
At the time, Doug wrote it purely from theory (no empirical data) but as far as
I know, no one has ever disputed the conclusions and the results have always
worked.
Doug, if you are out there, is there anything in your article you would edit after
these ten years? Any refinements?
currently,
Jack
-------------------------------------------------------------------------------
DesignerCouncil Mail List provided as a service by IPC using LISTSERV 1.8e
To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field):
SIGNOFF DesignerCouncil
To temporarily stop/(start) delivery of DesignerCouncil for vacation breaks send: SET DesignerCouncil NOMAIL/(MAIL)
Search previous postings at: http://listserv.ipc.org/archives
Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext. 2815
-------------------------------------------------------------------------------
---------------------------------------------------------------------------------
DesignerCouncil Mail List provided as a free service by IPC using LISTSERV 1.8d
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF DesignerCouncil.
To temporarily stop/(restart) delivery of DesignerCouncil send: SET DesignerCouncil NOMAIL/(MAIL)
Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail Archives
Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815
---------------------------------------------------------------------------------
|
