Server PSU, no 3v line ?

[TheDogFather]

I stumbled on a power supply on ebay, there wasnt long left and it was cheap so I bought it.

It was used for powering 20 hard drives in a server.

Allthough it has no 3.3v line it seems to have plenty of power, so was wondering if I could use/modify it to run my system.

This supply also has -5 and -12 but as I said no 3volt at all, how can I get around this ?


The info on it :

WAKE UP!! You are bidding on a very high quality WEIR heavy duty power supply unit. Part number : WP605 11 00 03 Manufactured by Weir part of LAMBDA GROUP of Unitech PLC. The item is not new but has been removed from upgraded equipment. The input voltage can be from 115 volts 8amp 50/60hz to 230volt 4amp 50/60hz. The unit has a rating of 550watts. Outputs 1) 5.00 volts at 65amps 2) 12.00 volts at 15amps 3) 12.00 volts at 10amps 4) 5.20 volts at 15amps 5) 12.00 volts at 15amps The voltages of all 5 outputs are adjustable plus or minus 10% Combined output not to exceed 550 watts This power supply unit was used to provide supply to a 20 hard drive server installation. Unit cost new, was in the region of £500 . Take a look at the Farnell or RS catalogues! Were talking QUALITY /RELIABILITY here! Was designed to meet worldwide safety and RFI approvals. Shipping weight is 4kgs Unit dimensions are Length:300mm, Width:190mm, Height:50mm. UK shipping by City Link is £7.50 (Do not ask me to POST this item in UK!) Surface mail USA/Canada is £36.40 ($55) e-mail me for other destinations Can also despatch by UPS or Fed-Ex on YOUR account worldwide. Please view my other auction items on e-bay

Thanks in advance.

TDF.

[TheDogFather]

What im wondering is can I step one of the other lines down to 3v somehow or maybe just use another power supply to supply the 3v, what are my options ?

[Flewdefur]

i wouldnt suggest trying to step it down and use it as your main PSU, but you could look at one of the guides for running a dual PSU and use it to power your drives.

[TheDogFather]

What about if I used a Programable integrated switching regulater ?

I was thinking of the PT8139 from Texas Instruments.
Heres a few details from the PDF for it:

Output Current 0.1 to 30 Amps
Input Voltage 10.8 to 13.2 Volts
Total output voltage variation max +/- 3%v

Theres a load more details, but not sure which are relevant.

Im guessing this is only replacing, whatever is missing from the PSU, and probobally at a better spec.

TDF.

[L337 M33P]

I think that PSU would make a good Peltier supply because of the two 12V rails. You could run a peltier off both those rails in parallel. As for the voltage regulators, I think it would be a bit expensive to get one with the current specifications and more importantly LINE REGULATION AND NOISE specifications to get it to run a PC without corruption of reboots.

[palee72]

You may want to give Larva a PM.. he seems to be the resident expert in power supplies...

[TheDogFather]

I think that PSU would make a good Peltier supply because of the two 12V rails. You could run a peltier off both those rails in parallel. As for the voltage regulators, I think it would be a bit expensive to get one with the current specifications and more importantly LINE REGULATION AND NOISE specifications to get it to run a PC without corruption of reboots.

Its actually got three 12v lines, 15a/10a/15a then a 5v at 65a and a 5.2v at 15a all adjustable +or- 10%

But ive no interest in pelt's at the moment, just phasechange and more phasechange.

Im hoping they are stable, quiet enough to run everything.

I just recieved three Programable integrated switching regulater's worth $50 each so hopefully they will deliver 3.3v within the required limits.


You may want to give Larva a PM.. he seems to be the resident expert in power supplies...

Yeah ive read his stuff, and was hoping hed give me the benifit of his knowledge, ill PM him later.

Thanks Guys.