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Do protective diodes on FET's make FET's one dirctional switches

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Discussion in 'Datasheets, Manuals and Component Identification' started by needToknow, Sep 19, 2012.

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  1. Sep 19, 2012 #1
    needToknow

    needToknow

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    Sep 14, 2011
    One direction is already open due to the diode. So to make a two directional switch, one needs two FET's.

    Is this correct? Thank you.
     
  2. Sep 19, 2012 #2
    Harald Kapp

    Harald Kapp Moderator Moderator

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    Nov 17, 2011
    Correct, yes. Connected in series (not in parallel as in analog switches).
    Have a look at AC photomos relays, they have exactly that kind of internal circuit.
     
    Last edited: Sep 20, 2012
  3. Sep 20, 2012 #3
    needToknow

    needToknow

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    Sep 14, 2011
    I see. Thank you very much.
     
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