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  1. #1
    Junior Member level 3
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    tl431 spice model

    Does someone have a SPICE model for the TL431/LM431/KA431 shunt regulator?

    Thanks.

  2. #2
    sick_man
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    lm431 spice model

    h*tp://w8w.fairchildsemi.com/models/spice/

    try here



  3. #3
    sick_man
    Guest

    tl431 spice

    this is how i got it


    i open a new browser

    go to google.com

    and type lm431 spice model

    sometimes caps and space between lm and the number etc make a big dif too what reply you get from an engine

    google is the best
    the rest use it as an engine hehehe



  4. #4
    Junior Member level 3
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    tl431 pspice

    Hi, I found it in a library I discharged form TI ages ago (and now not available, I'm thinking to crate a public depository for those libraries, maybe on the FM...).

    Thanks for your effort.

    P.S. I agre in your opinion on Google.



  5. #5
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    lm431 spice

    Hi,I need the TL431 Spice model too.
    can you please post in FM or send to me as PM.

    Thanks a lot!

    Sonic



  6. #6
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    tl431 pspice model

    hi guys,here's the model for TL431 from Intusoft:

    *SRC=TL431;TL431;Voltage Ref.;;
    *SYM=TL431
    .SUBCKT TL431 7 6 11
    * K A FDBK
    .MODEL DCLAMP D (IS=13.5N RS=25M N=1.59
    + CJO=45P VJ=.75 M=.302 TT=50.4N BV=34V IBV=1MA)
    V1 1 6 2.495
    R1 6 2 15.6
    C1 2 6 .5U
    R2 2 3 100
    C2 3 4 .08U
    R3 4 6 10
    G2 6 8 3 6 1.73
    D1 5 8 DCLAMP
    D2 7 8 DCLAMP
    V4 5 6 2
    G1 6 2 1 11 0.11
    .ENDS



  7. #7
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    Re: tl431 pspice model

    I find this post because I was researching a spice model for TL431. The model's Javier from Intusoft, it's not a good model because it can't simulate a shunt regulator for example.
    But I find here a good spice model developed by Eugene Dvoskin.

    I simulated a shunt regulator in LTspice with Eugene Dvoskin's Model. And it was in harmony with the theory (VZ = VREF (1 + R1/R2) + IREF*R1).

    I give you the .spice
    Code:
    .subckt TL431ED K A ADJ
    Q1 K ADJ N005 0 QN_ED
    Q7 N003 N003 N001 0 QP_ED
    D1 A N004 D_ED
    Q8 N004 N003 N002 0 QP_ED
    R4 N005 N009 3.28k
    R2 N009 N012 2.4k
    R3 N009 N010 7.2k
    R1 N014 A 800
    R5 N006 N011 4k
    R7 K N001 800
    R8 K N002 800
    R6 N013 N012 1k
    R9 N008 N007 150
    R10 N008 A 10k
    D2 A K D_ED
    C1 K N004 10p
    C2 N010 N011 20p
    Q2 N012 N012 A 0 QN_ED area=1.2
    Q3 N010 N012 N014 0 QN_ED area=2.2
    Q5 N011 N010 A 0 QN_ED
    Q9 K N004 N007 0 QN_ED
    Q10 K N008 A 0 QN_ED area=5
    Q4 N003 N005 N006 0 QN_ED
    Q6 N004 N013 A 0 QN_ED area=0.5
    Q11 N004 N004 ADJ 0 QN_ED
    .model D D
    .lib C:\PROGRA~1\LTC\LTSPIC~1\lib\cmp\standard.dio
    .model NPN NPN
    .model PNP PNP
    .lib C:\PROGRA~1\LTC\LTSPIC~1\lib\cmp\standard.bjt
    .model QN_ED NPN(BF=140 Cje=1p Cjc=2p Rb=40 VAF=80 VAR=50 KF=3.2e-16 AF=1)
    .model QP_ED PNP(BF=60 Cje=1p Cjc=3p Rb=80 VAF=70 VAR=40)
    .MODEL D_ED D(Rs=5 CJ0=4.0p)
    * Model developed by Eugene Dvoskin --> "http://www.audio-perfection.com"  02/05/2012\nThis TL431 model has been developed from schematic in the datasheet\nhttp://www.ti.com/lit/ds/symlink/tl431.pdf\nIt matches most of DC, AC, Transient, Stability and Noise performance of TI TL431\nNo attempts were made to cover Temperature dependences
    .backanno
    .end