Bob Tellefsen wrote:
Gus
I remember reading somewhere that switching supplies
require some minimum load to be stable. You could
try putting a small resistive load, maybe 50 mA, on the
P/S and see if it calms down.
Good luck and 73
Bob N6WG
Hi Bob,
The loads on the supply are greater than 200mA in each of the operating
cases I described. My concern is not with output stability under load.
Rather, I want the supply to really be off when I turn off its power
switch. It apparently isn't, producing those unexpected pulses.
I was alerted to this problem when my computer kept displaying messages
about a network connection being connected and disconnected
periodically. The PIC MCU project I'm working on has a Lantronix XPort
IP-to-serial interface unit on it, and the short bursts of power were
causing it to wake up and respond over the network.
Thanks,
Gus
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