^^^^^^^^^^^^^^^^^^^^^^
Typically, ATX power supplies use diodes with substantially larger
voltage ratings than twice the supply voltage. The reason for this is
that leakage inductance causes spikes which add to the reverse voltage
that the diode must withstand. An 80V requirement is not at all
excessive. If you look at test results for ATX power supplies, these
diodes are snubbed to only just below their ratings, with the actual
voltages measured with an oscilloscope.
I would agree with Stefan that the 60A rating is somewhat large.
There are other salvaged components that would be a weak link first.
The board I am making has multiple 250watt atx transformers on it and uses
other components from atx powersupplies, such as the input filtering caps,
^^^^^^^^^^^^^^^^
It seems that there is some desire to reuse components from the base
ATX supplies. I completely sympathize with this desire, since
otherwise they end up in the trash. Jamie will find it pretty
challenging to snub a 30V diode intended for the 5V supply for 24V
service. In fact, at 24V out, the diode would not even survive the
steady state. By changing to a full wave rectifier output, there is a
chance of success, but it will be necessary to over snub and carefully
bring down the size of the snubber while monitoring with a load.
Else, pop!
....
I think I know what Jamie is trying to make. This is a challenging
project.
