Electronics > Projects, Designs, and Technical Stuff
switching-PSUs: why can't you usually exceed the 50% of declared power?
engrguy42:
Again, look at the Intel ATX design guide. It tells you exactly what the requirements are. I'm not sure why you feel 1 second is too long. Is that what the spec says? If the spec doesn't say the operating time then there's not much you can do.
As far as your supply dipping to 11.2 rather than 11.4...why is that important? Yeah, it's outside the spec, but does that really matter?
0db:
--- Quote from: engrguy42 on May 23, 2020, 11:38:01 pm ---I'm not sure why you feel 1 second is too long. Is that what the spec says?
--- End quote ---
Because in 1 sec it was enough to overheat, and it started making bad smell. Parts were for sure stressed.
engrguy42:
BTW, here's what it says about overcurrent protection. No more than 240VA on each rail, greater than that causes a trip. Test that at a minimum rate of 10A/second. So taking 1 second to trip seems pretty reasonable.
engrguy42:
--- Quote from: 0db on May 23, 2020, 11:48:03 pm ---
--- Quote from: engrguy42 on May 23, 2020, 11:38:01 pm ---I'm not sure why you feel 1 second is too long. Is that what the spec says?
--- End quote ---
Because in 1 sec it was enough to overheat, and it started making bad smell. Parts were for sure stressed.
--- End quote ---
Come on, did you actually measure the temperatures? Were they high enough to damage anything? You're really worried about it taking 1 second to trip?
engrguy42:
Hold on...the OCP section I posted was from an older version. Here's the 2018 version
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