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xio2000a, basic power question,

Jim Lewandowski
Prodigy 20 points
Other Parts Discussed in Thread: XIO2000A

Greetings,

I recently bought a StarTech PCI Express to PCI breakout box which uses the xio2000a chip.  My application requires more power than is supplied with the given configuration, they stepdown 12V, 3A, and when I load my PCI cards the power supply is overloaded. 

My question is if I were to upgrade the power supply would the xio2000a chip be able to deal with that or is there a power limitation to this package?

I need "<36 Watts" each for 2 of my PCI cards and much less for the last.  So maybe 75 Watts total, or about 15Amps.

I'm wondering if I boost the power supply could I damage the xio2000a chip?  Currently there is a Silicon Core CX2596
Microelectronics SIMPLE SWITCHER Power Converter Corp. 150 kHz 3A Step-Down Voltage Regulator I would also need to replace.

Any help would be appreciated, since I'm not qualified to design these things!

Thanks,

Jim Lewandowski

Stanofrd University

  • 0
    Guru 319310 points

    My application requires more power than is supplied with the given configuration, they stepdown 12V, 3A, and when I load my PCI cards the power supply is overloaded.

    Not surprising, as PCI allows no more than 25 W per slot.

    if I were to upgrade the power supply would the xio2000a chip be able to deal with that or is there a power limitation to this package?

    The XIO2000A does not provide power. It just eats a little bit for its own operation; power must be supplied by external circuitry.

    The chip is not connected to 12 V, so whatever you do on that line is unlikely to affect it.

    The easiest solution for your problem would be for the PCI cards to have separate power inputs, like those fat graphics cards.

  • 0 in reply to Clemens Ladisch
    Prodigy 20 points

    Thanks for your response!  After checking with my pci cards manufacturer, the boards each take about 20W, though with 2 in the extension box I'm still over the 36W supplied by the power source.  I may try to upgrade the power source for this box if I can locate a good power chip, currently it has a:

    Silicon Core CX2596
    Microelectronics SIMPLE SWITCHER Power Converter
    Corp. 150 kHz 3A Step-Down Voltage Regulator

    This thing also has the 12V 3A rating.  There are a few PCIEx to PCI breakout box options out there but aroud $1600.  So if I can mod this one it will help us.

    Thanks again for the response.

    Jim