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How to reduce leakage current in zener diode?

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Discussion in 'General Electronics Discussion' started by Ankit.kumar, Sep 6, 2012.

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  1. Sep 6, 2012 #1
    Ankit.kumar

    Ankit.kumar

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    Aug 8, 2012
    Hii,

    Am working as a intern in a company and my task is to reduce the leakage current of zener diode using hspice. Can anyone suggest me some way to solve this leakage current problem.

    Thanks
     
  2. Sep 6, 2012 #2
    (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

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    Jan 21, 2010
    Change the model of the zener so that it has zero leakage.

    Problem solved!

    Of course, in the real world it may not be that simple...

    And what do you mean by leakage? Do you mean you want to more defined knee? If so, there are a large number of options, starting with things like a TL431.

    Or is it that too much current passes through the zener? Perhaps a higher value resistor in series? Perhaps use a series instead of shunt regulator?

    More details might assist us in assisting you.
     
  3. Sep 6, 2012 #3
    Ankit.kumar

    Ankit.kumar

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    0
    Aug 8, 2012
    Thanks steve

    i am not sure what exactly my boss want me to do...So may be i will discuss this things which u suggested to my boss and then see what he need. thanks
     
  4. Sep 7, 2012 #4
    Ankit.kumar

    Ankit.kumar

    5
    0
    Aug 8, 2012
    Hii steve,

    Below is a subcircuit of a zener diode. But using it in Hspice is showing lots of error. Can you help me to change this subcircuit to Hspice?

    *1 N5071 TEMPERATURE COMPENSATED MODEL
    .SUBCKT 1N5071 1 5
    D1 13 DFOR
    D2 4 2 DBLOCK
    IC 1 2 17.8
    D3 4 1 DLEAK
    *
    RS 3 4 .119 TC=-7E-3,-5E-7
    RC 2 1 .81 TC=6.52E-4,-3.46E-7
    .MODEL DFOR D(IS=4.01E-13 N=1.21 RS=O
    + EG=.958 XTI=6.5)
    .MODEL DBLOCK D(IS=lE-12 N=.73 RS=O EG=.1
    + XTI=-3.86 CJO=O)
    .MODEL DLEAK D(IS=9.93E-11 Nz58.13 EG=11.41
    + XTI =321)
    ENDS
     
  5. Sep 7, 2012 #5
    (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

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    2,840
    Jan 21, 2010
    Not at all. I tend to work in reality when I want real results.

    What happens in reality?
     
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