Michael A. Terrell wrote:
Tom Del Rosso wrote:

When a mobo has bad caps the PSU shuts down, but what triggers it?
What does the PSU see from its point of view? Peak current spikes?


Excessive ripple keeps the 'Power good signal' set to false.

But whether or not that signal is involved in the chain of events (normally
it drives reset and maybe not all designs necessarily use it that way) what
is sensed on the PSU outputs is what I'm thinking about. Would it be
voltage ripple and not just current all the way back in the PSU even if the
PSU caps are good?

And are PSU caps likely to be damaged too after use with a bad mobo?


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