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5.6V Zenner Diode - LTspice Model Need

Discussion in 'Circuit Simulation & PCB Design' started by Suraj143, Oct 15, 2017.

  1. Suraj143

    Suraj143 Active Member

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    Can somebody give me 5.6V zenner diode for LTspice, There is no any 5.6V zenner model.
    Version 4.23K
     
  2. MikeMl

    MikeMl Well-Known Member Most Helpful Member

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    Place a generic Zener from the default lib on your page. Click on the letter D. Edit the text box to replace "D" with "Z5p6" ( do not click on the body of the Zener symbol itself).

    Now paste the string on the next line into the text box with comes from clicking on .OP

    .model Z5p6 D(Is=1.5n Rs=.5 Cjo=185p nbv=3 bv=5.6 Ibv=1m)

    The .model statement has to be placed somewhere on the schematic. See here:

    54.png
     
    • Informative Informative x 1
  3. crutschow

    crutschow Well-Known Member Most Helpful Member

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    My LTspice IV has two 5.6V Zener models:

    upload_2017-10-15_21-59-8.png
     
  4. dave

    Dave New Member

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  5. Suraj143

    Suraj143 Active Member

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    Hi I cannot find .OP Where is it?
     
  6. Suraj143

    Suraj143 Active Member

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    Can you tell me whats the version? My one is LT spice IV version 4.23K.
     
  7. crutschow

    crutschow Well-Known Member Most Helpful Member

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    Mine is 4.22k.
     
  8. alec_t

    alec_t Well-Known Member Most Helpful Member

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    .OP is at the top right of your screen.
     
  9. Pommie

    Pommie Well-Known Member Most Helpful Member

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    I've got the most up to date LTspice XVII and it hasn't got a 5.6V zener.

    Mike.
     
  10. crutschow

    crutschow Well-Known Member Most Helpful Member

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    Apparently, for some odd reason, they eliminated those Zeners in later editions of LTspice.
     
  11. GromTag

    GromTag Active Member

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    Favoring towards adjustable reference devices instead of continued adding per individual Zener? (Referring to the programs possible reduction of size and continuous updates by adding list of models "out of the box")
    The only reason to remove models instead of updating them regarding in thoughts.
     
  12. crutschow

    crutschow Well-Known Member Most Helpful Member

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    Here's my LTspice model for the D1N752 5.6V Zener:
    You can put it in the standard.dio file in the LTspice cmp library

    .MODEL D1N752 D(IS=1E-11 RS=6.168 N=1.27 TT=5E-8 CJO=3.766E-10 VJ=0.75 M=0.33 BV=5.477 IBV=0.01 type=zener vpk=5.6)
     
  13. Suraj143

    Suraj143 Active Member

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    Thank you very much.
     
  14. ci139

    ci139 Active Member

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    the target app./env. defines what you need (here is moderate to low frequency v.)
    in some occasions you can just tile the number of 2N2222-s with BC or BE or EC tied together apx 700mV drop for each
     

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