Multisim assistance

Discussion in 'Homework Help' started by shapes, Feb 22, 2005.

  1. shapes

    Thread Starter New Member

    Feb 21, 2005
    4
    0
    i cant seem to get my TRIAC circuit in Multisim to operate

    it seems as tho it is not even triggering even when i connect a direct supply to the Gate

    can anyone c wat i am doin wrong in the attached drawing
     
  2. mozikluv

    AAC Fanatic!

    Jan 22, 2004
    1,437
    1
    hi

    base on the datasheet of your triac what's the gate trigger current. with your circuit you have about 17v supply and a current limiter resistor of 220ohms w/c will give you about 77ma of gate current. that current is way beyond the capability of your triac. the gate voltage for those kind of triac is usually 0.8v.

    in a real circuit you have already busted your device. :(

    have you not check the datasheet of the device you are using? even if you use simulations you still have to use the specs of the device :)
     
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