Thank you for all of your help gents, particularly the tip about the very latest PSUs having single high current 12v rails.
I went back to the computer shop and opened up a few PSU of varying vintages and it seems that of course whilst the modern ones are the most suitable for making high current 14.4v supplies they are of course much more difficult to modify to 14.4v thank the older, simpler ones.
The sweet spot seems to be ATX 2.2 PSU. I have a 650 watt one here with 4 12v rails capable of 17 amps each. This appears to be because this specification prohibited more than 20a to be drawn from each rail but the PSUs themselves were from an era of high 12v current demand.
I think I will therefore be able to run these rails in parallel with little trouble but whether I can mod it for the higher voltage remains to be seen.
I have an Audsion SRX-1 ( The old school one I listed after as a teenager reading the magazines) coming which would be powered by the supply.
I went back to the computer shop and opened up a few PSU of varying vintages and it seems that of course whilst the modern ones are the most suitable for making high current 14.4v supplies they are of course much more difficult to modify to 14.4v thank the older, simpler ones.
The sweet spot seems to be ATX 2.2 PSU. I have a 650 watt one here with 4 12v rails capable of 17 amps each. This appears to be because this specification prohibited more than 20a to be drawn from each rail but the PSUs themselves were from an era of high 12v current demand.
I think I will therefore be able to run these rails in parallel with little trouble but whether I can mod it for the higher voltage remains to be seen.
I have an Audsion SRX-1 ( The old school one I listed after as a teenager reading the magazines) coming which would be powered by the supply.
Yes, but the O.P. mentions TL494 controller and LM339 comparator which points to Old School technology ...
The new style p.s. has resonant converter which requires more complex modern controller like NCP1396 + active PFC + synchronous rectification + + +
Good information, thank you.
Which ATX specification would the latter refer to?
the ones with a high current 5v rail may be regulating off of that. this will cause low power output from the 12v rail with no load applied to the 5v rail.
Good information, thank you.
Which ATX specification would the latter refer to?
ATX12V version 2.2 (80plus)
www.onsemi.com/pub/Collateral/TND359-D.PDF
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