I'm really curious about the idea that slow diodes aren't fast enough
for this task. As I understood it, all silicon diodes are very fast to
turn on (nanoseconds), and all the difference comes in the turn-off
time (Trr - Reverse Recovery Time). That can cause a problem in many
cases, particularly when it may cause high-side to low-side
shoot-thru, but I don't think that should be a problem here.

Of course, it's not 100%, but I just did a spice sim using Diodes,
Inc.'s model of the 1N4001 and the turn-on is faster than 10ns, turn
off is 7 microseconds. 1N914 shows about the same for turn-on, and
turn off is 35 ns.

Sean


On Dec 28, 2007 8:05 PM, Chris Smolinski <csmolinski@blackcatsystems.com> wrote:
> You'll want to use a faster diode than a 1N4007.  Also, Google "snubber".
>
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