I have a self-built custom-made computer that is using a Ultra X3 1000 watt power supply. Over the years I have been reducing the power needs by adopting more energy efficient hardware. My computer is now using about 200 watts at any given time and can jump to a maximum of 360 or so when gaming or folding. So the PSU is overkill by 60% minimum.
I also have a 2560x1440 LG S-IPS LED monitor I built myself (63 watts max typical) using parts I sourced from around the globe and on eBay. The LG electronics that powers the monitor only needs a 24V 5A power brick for which I do not have yet. It is only $23 on ebay. However, I am wondering if I could use one of the empty +12V modular connectors on my PSU to supply the voltage/current to the monitor as well?
The PSU is a 85% efficient model with 70 amps on the +12V rail. I need to boost it to 24V, but I only need 5A according to the original power brick these come with.
hi
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Yes. The current through the converter is determined by the load. I doubt the monitor is pulling all 5 amps from the original supply anyway. Just throw an ammeter on the ground of the pc side and measure it to be in the safe side, but it should work without modification. With 100% efficiency the input would be, at max draw, 12v 10A, for 24v 5A. In free air inside the pc case, with fans you should be alright assuming 4A load draw
www.wago.com/infomaterial/pdf/51226738.pdf
is best paper good luck
You can develope such a converter.
- From the supply side of 12V, the maximum deliverable power is 840W (12Vx70A)
- From the demand side of 24V, you need only 120Wmax. Considering the conversion loss, the supply source is more than enough. You can even connect several converters to this 12V source.
Obviously, the indicated 5A is the maximum demand current which decide powertronic components you have to use.
Hi
From the demand side of 24V, you need only 120Wmax. Considering the conversion loss, the supply source is more than enough. You can even connect several converters to this 12V source.
You can use the 12 volts 70 Amp source to convert to 24 volts 5 Amp without any problem but if you use SMPS technique for this conversion you should take care of EMI and EMC otherwise the quality of your mother power supply may become unsuitable for your delicate application.
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