The difference between single and multi rail psus are how the ocps are configured...
But can a single rail psu actually have distributed output without ocp? Do any of modern psus have this kind of output configuration?
The difference between single and multi rail psus are how the ocps are configured...
But can a single rail psu actually have distributed output without ocp? Do any of modern psus have this kind of output configuration?
You might want to rephrase the question.
If you have a single +12V output that outputs to multiple circuits, how are you going to differentiate that as a "multiple rail PSU" if each circuit doesn't have OCP? What else would you expect to be added? Separate filtering for each rail?
Yes I know my question is crappy...
The reason why I asked it is some guy said that
'single rails don't have strict separated ocp, but can be distributed internally and the outputs may be separated-limited',
but I never heard this before.
You're talking to some weird people that like to double speak and generalize.
Like the whole "LLC is less reliable" thing.
True that a cheaper single +12V rail PSU may not have OCP and rely on OPP for protection. But most better PSUs use a supervisor IC that supports OCP.
And the very definition of a multiple +12V rail PSU is a single +12V rail PSU separated into separate circuits, each with it's own strict OCP. So I don't have any idea what this guy you're talking to is talking about. Multiple +12V rails doesn't simply mean a +12V rail split out into separate cables because that would define every ATX PSU out there!!!!
Yes so many stuffy people...
I don't know what to say to them lol
+ Guess he is talking about separated PCB patterns / but no ocp, does this have any differences with combined pattern?
So you mean there is no difference in separated/integrated output pcb trace pattern if there is no ocp?
Nope.
There are plenty of single +12V rail designs that have the +12V output to multiple spots on a PCB and then to their output and that's still considered a single +12V rail.
Especially with fixed cable PSUs; you can't have all of your +12V leads come out of the same place on the PCB. Too difficult to assemble and too much resistance leading to that point. So it's not uncommon to split the +12V up to two, three or more traces and solder different +12V leads to those points. It's still a single +12V rail unless there's OCP on those leads.