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Thread: Help with DC-DC for Mini-ITX

  1. 04-29-2002, 10:57 AM #1
    Glyn
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    Help with DC-DC for Mini-ITX

    I've just recieved one of those Via Mini-ITX motherboards, and want a DC-DC converter to power it.

    I've found the ACE-890V, but it has no 3V output.

    Is it ok to take a feed of the 12V, and reduce it with resistors?
    Or is there a better device?
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  2. 04-29-2002, 11:36 AM #2
    hornet
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    Using voltage regulator IC's would be a much better idea, do a search on maxim's website or even nationals.

    don't quote me, but i think people are using the ACE-895, it might be worth a look.
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  3. 04-29-2002, 01:10 PM #3
    Rob
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    Don't use resistors, the way they drop the voltage is by heat, you could easily make a 50 watt heater for your car if your not carefull.

    Also it'll be difficult to obtain an accureate 3.3v reference as the PC will effectivly appear to be a "resistor" with an unknown value.

    Try a voltage regulator if your not very hot on electronics(althought max current might be an issue), alternatively if your a bit mor confidence try a switch mode supply.

    Now for the blatant plug,

    Have a look at www.mp3mini.tk for more info on PSU.

    Rob
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