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Recent content by Circlotron

  1. C

    please give any idea/concept for wrong AC Phase Sequence detecting

    Use phase A as a reference. Measure the time interval from phase B going positive to phase C going positive. That time interval will be different for forward and reverse rotation.
  2. C

    Simple relay driver circuit - Will this be reliable in the long run?

    Also NC contacts are more sensitive to vibration because of limited contact pressure.
  3. C

    Not able to getting 5V. (from 5V regulator IC)

    The input to the 7805 needs to be at least several volts higher than the output, say 8 volts minimum input.
  4. C

    [SOLVED] SG3525 oscillator asymmetry when error amp is maxed out.

    Hi Warpspeed, thanks for that. I spent the whole afternoon fiddling with it and I had some success by changing the value of the timing cap discharge resistor. Was using zero ohms with 1nF which should have been alright according to the datasheet, but now I have 390 ohms and there is a tiny...
  5. C

    [SOLVED] SG3525 oscillator asymmetry when error amp is maxed out.

    Hi all. I have an interleaved voltage-mode boost converter that uses both sides of a SG3525 to drive two MOSFETs in anti-phase for use in an automotive environment. Inductors are off the shelf 220uH powdered iron toroids. Input voltage is nominally 12V and output can vary between 15-25V. Output...

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