At 10:02 AM 12/28/2004 -0800, you wrote:
> > Can one parallel Schottky diodes?  Do they have the same characteristics
> > as silicon diodes, and thus require current sharing resistors?
>
>They both have negative tempco.

At relatively high current, they (and silicon diodes) cross over into
positive tempco.

A 1N400x does it at around 15A, a 100A 100BGQ015 Schottky does it at
about 175A. At those currents, they have essentially zero tempco (but it's
not very repeatable from unit to unit).

You can see the effect on the Vf curves if they show them for the usual
three temperatures vs. current.

Best regards,

Spehro Pefhany --"it's the network..."            "The Journey is the reward"
speff@interlog.com             Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog  Info for designers:  http://www.speff.com




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