Help: Dual linear power supply with switching ATX pre-regulator

Discussion in 'The Projects Forum' started by Silvio, Jul 24, 2015.

  1. Silvio

    Thread Starter New Member

    Jul 2, 2015
    Help needed in designing an output filter for my switching power supply. I already have a 100uh inductor feeding a 3300uf cap. and another 10uh inductor in series with another 3300uf cap. This will be feeding a linear regulator. I am concerned about the noise it might generate on the linear regulator and the output. The switching frequency of my switcher is 26.4 Khz. Can anyone help me out in this design? Any suggestions will be considered
    . schematic 1 psu.PNG schematic 2 psu.PNG