Does a single rail PSU with 'distributed' output exist?

[rgbodosk]

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?

[Jon Gerow]

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?

[rgbodosk]

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.

[Jon Gerow]

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!!!!

[rgbodosk]

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?

[Jon Gerow]

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?

Traces in a PCB carries power just like wires do.

[rgbodosk]

So you mean there is no difference in separated/integrated output pcb trace pattern if there is no ocp?

[Jon Gerow]

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.