At 09:40 PM 2/7/2006 -0200, you wrote:
>Wouter van Ooijen wrote:
>
> > Sideline: does a diode spec mention a maximum *forward* voltage?
>
>No, but a maximum forward current. As long as you stay below that, the
>forward voltage is in normal ranges.
>
>Gerhard

They always spec the maximum forward voltage at one or more currents, and
often give the typical voltage at a variety of currents. You can infer what
the maximum forward voltage should be, given the current (and junction
temperature).

For example, the 1N400x series has a maximum Vf of 1.1V at 1A/Tj =3D 25=B0C=
 (0.93V
typical), and typically 1.4V @20A Tj =3D 25=B0C.

There is a current (around 10A, IIRC) where the tempco of forward voltage
is actually zero, but obviously it is of rather limited utility.

Best regards,

Spehro Pefhany --"it's the network..."            "The Journey is the rewar=
d"
speff@interlog.com             Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog  Info for designers:  http://www.speff.com
->> Inexpensive test equipment & parts http://search.ebay.com/_W0QQsassZspe=
ff



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