Buck converter

Discussion in 'General Electronics Chat' started by meddyliol, May 23, 2014.

  1. meddyliol

    Thread Starter New Member

    May 5, 2014
    4
    0
    I bought one of these to use with a 12V supply so that I could get a variable output voltage. When I connected the 12V the output from the converter started off at about 6V and gradually increased to about 11.36V. Almost like a capacitor charging over a very very long time constant. I adjusted the output to 9V and then switched off. When I switched back on again I expected it to be 9V but no, it went back to about 6V and climbed back up again (taking about 20 minutes). Of course, there could be a fault with the converter but was wondering if anyone else had had any such problems before I send it back. I enclose an attached file showing the item.

    Thanks

    Brian
     
  2. #12

    Expert

    Nov 30, 2010
    16,261
    6,768
    No file attached, but a power supply should come up to the proper voltage in a few milliseconds.
     
  3. crutschow

    Expert

    Mar 14, 2008
    12,993
    3,227
    The power supply may require a load for proper operation. Add a 500 ohm resistor or so to the output and see what happens.
     
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