Forum Discussion

Eric_truite's avatar
Eric_truite
Icon for New Contributor rankNew Contributor
1 year ago
Solved

DE0-Nano - Which component is it?

Hello, I use the DE0-Nano board for several university projects and I noticed that it is heating excessively. Using an infrared camera, I observed that a component is reaching over 150°C. I suspect ...
Board Debug
  • _AK6DN_'s avatar
    _AK6DN_
    1 year ago

    It was not hard to find. The part has a U25 reference next to it. Look at the last page of the schematic ... upper left corner.

    Here it is ... it is the key part of the 5V to 9V DC-DC upconverter that supplies the LTC 2x7 connector J17.

    And for reference Terasic is not part of Intel, never has been. It is a Taiwan based totally separate company.

    • Eric_truite's avatar
      Eric_truite
      Icon for New Contributor rankNew Contributor
      1 year ago

      Hi guys,

      Yes, I know that my card is a DE0-Nano-SOC. I should have specified that it was the underside view (I didn't know there were DE0-Nano without SoC, my bad). Terasic, yes, but it's part of Intel...
      I have the documentation, thank you, because I own the product. Unless I'm mistaken, this component is not listed there. I use FPGAs to control my power electronics, not really my area of expertise.
      So I'm turning to FPGA and electronics experts to see if you have any idea what component this is, or better : the circuitry.

      It's purely hardware and quite exotic as a question, but nothing ventured, nothing gained. Perhaps the router of the DE0-Nano is watching me!

      Thanks!

      • FvM's avatar
        FvM
        Icon for Super Contributor rankSuper Contributor
        1 year ago
        The function of U25 (5V to 9V boost converter) has been explained in detail by _AK6DN_ above. 9V rail isn't used on the board, it's supplying IO connectors. If the device overheats without external load, it's most likely defective. It can be removed if you don't use 9V suppy.