At 02:58 AM 4/4/2006 +1200, you wrote:
> >>I have but I can't use it. The supply varies between about 6 and
> >>40V.
> >>Aren't there Shottky bridge rectifiers (small, inexpensive ?)
>
>Be careful of voltage ratings with Schottky. They tend to be lower
>than most and quite sensitive (magic smoke wise) to rated voltages
>being exceeded.
>
>
>         RM

The BAS70 type I mentioned has guard rings that are supposed to break down
before the Schottky junction dies. Another issue is that high voltage
Shottkys tend to have higher voltage drops (and lower leakage, which is good).
If you're depending on the lower Schottky drop to prevent too much current
from going through a parallel silicon junction you might run into trouble at
high current, with a high voltage Schottky and/or if the silicon junction
is much warmer than the Schottky junction.

>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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