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Snubber Circuit

Discussion in 'General Electronics Discussion' started by MannaMan86, Jan 31, 2014.

  1. MannaMan86

    MannaMan86

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    0
    Dec 9, 2013
    I am trying to design a snubber circuit. I have a switching power supply which uses a LNK613 switch. My problem lies in the fact that when I power up an electric razor, I get an inductive kick, which messes up my power source. It spikes my voltage up and down, and I want to prevent it from going lower than 2.3V.
     
  2. Arouse1973

    Arouse1973 Adam

    5,164
    1,078
    Dec 18, 2013
    Could thisbe a loading issue from the motor?

    Adam
     
  3. MannaMan86

    MannaMan86

    19
    0
    Dec 9, 2013
    I'm assuming it's the phenomenon of the inductive kick, since the switch is turning on/off and the inductive load (electric razor motor) resists the changing electric current and spikes the voltage up/down. I would like to design a snubber, but I don't know where to connect it to. Would I hook it up to the Drain and Source of the LNK613? Also, I cannot obtain values for snubber capacitance and snubber resistance. I have never done a snubber before.
     
  4. Arouse1973

    Arouse1973 Adam

    5,164
    1,078
    Dec 18, 2013
    Put a back emf diode across the motor. Aslong as the motor only goes in the same direction. I think this will work.
     
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