Recently, Somebody Somewhere wrote these words
> unfortunatly splitting the board or any other dramatical change of the
> design is out of the question. i think that the problem is sudden
> changes of the required current that is not propertly handled by the
> decoupling capacitors / power supply. the board was never build to be
> servisable (filled with lots of fine pitch BGAs with no much room
> around for rework) the board should fit itu a predesigned case, so i
> cannot change the size eather.
What is it? (So I can make mental notes not to buy :-)
Respecify your smoothing to be low esr capacitors.
Have you worked out the impedance of the power supply? If Uwe's
calculations of 30A peak are correct, that has to be some amazing psu.
You have this course open to you. Write a memo. Adress it to everyone in
your outfit that matters. Lay out the problems. Make workable
reccomendations. Then nrn of all possible failures, and liabilities.
Then nobody can say 'we didn't know.'
--
With best Regards,
Declan Moriarty.
--
Author: Declan Moriarty
INET: [EMAIL PROTECTED]
Fat City Hosting, San Diego, California -- http://www.fatcity.com
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