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TINA/Spice/TL431: SPICE Model

Part Number: TL431
Other Parts Discussed in Thread: TINA-TI,

Tool/software: TINA-TI or Spice Models

Hi There

I try to import TL431 model downloaded from TI website to LTSPICE

The model is "TL431.lib"

I need to know the pin-out sequence for the model.

So technicallly, on the linecode .SUBCKT TL431 and .SUBCKT TL431_H8 (what is the 1 2 3 4 port) ? Which one is cathode, anode, reference and N/C ?

ASAP, please

Kiet Pham at Teledyne

650-861-8736

kpham@teledyne.com

.SUBCKT TL431 7 6 11

* K A FDBK

R_R18 0 N16955548 1 TC=0,0

C_C17 N16955362 0 1n

C_C18 2 6 0.5u

D_D11 N16976181 N16975344 DCLAMP

C_C19 3 4 0.08u

E_E23 2 N16955404 VALUE { {I(V_V16)*15.6} }

C_C22 N16955548 0 1n

R_R13 N16955401 N16955404 1 TC=0,0

E_E27 VREF 0 VALUE { IF(V(11,0)<2.495,V(11,0),2.495) }

V_V16 N16955401 6 0Vdc

R_R14 0 N16955362 1 TC=0,0

X_H8 7 N169559021 IKA 6 TL431_H8

E_E24 4 N16955473 VALUE { {I(V_V17)*10} }

E_E28 N16955936 0 11 6 1

V_V7 N16976181 6 2

G_ABM2I2 6 N16975344 VALUE { IF((V(3)-V(6))< 0 , 1.73*(V(3)-V(6)) -1U ,

+ -1U) }

R_R15 N16955470 N16955473 1 TC=0,0

V_V17 N16955470 6 0Vdc

G_G4 6 2 VREF N16955936 0.11

R_R16 0 N16955493 1 TC=0,0

D_D12 N169559021 N16975344 DCLAMP

R_R17 N16955529 N16955532 1 TC=0,0

C_C21 N16955493 0 1n

E_E25 3 N16955532 VALUE { {I(V_V18)*100} }

V_V18 N16955529 2 0Vdc

V_V19 N16985445 0 0Vdc

.ENDS

*$

.subckt TL431_H8 1 2 3 4

H_H8 3 4 VH_H8 1

VH_H8 1 2 0V

.ends TL431_H8

*$

.model DCLAMP d

+ is=1.35e-011

+ rs=0.005

+ n=0.001

+ cjo=4.5e-011

+ vj=0.75

+ m=0.302

+ tt=5.04e-008

+ bv=100

+ ibv=0.001

*$

  • Kiet,
    Please open the model file with a text editor like Notepad.
    The labels you are looking for are in text above the .SUBCKT statement.
    Regards,
    John
  • Hi John
    I have opened the model on text editor, and the model does NOT tell me the pin out sequence or any label
    See below

    .SUBCKT TL431 7 6 11
    * K A FDBK
    R_R18 0 N16955548 1 TC=0,0
    C_C17 N16955362 0 1n
    C_C18 2 6 0.5u
    D_D11 N16976181 N16975344 DCLAMP
    C_C19 3 4 0.08u
    E_E23 2 N16955404 VALUE { {I(V_V16)*15.6} }
    C_C22 N16955548 0 1n
    R_R13 N16955401 N16955404 1 TC=0,0
    E_E27 VREF 0 VALUE { IF(V(11,0)<2.495,V(11,0),2.495) }
    V_V16 N16955401 6 0Vdc
    R_R14 0 N16955362 1 TC=0,0
    X_H8 7 N169559021 IKA 6 TL431_H8
    E_E24 4 N16955473 VALUE { {I(V_V17)*10} }
    E_E28 N16955936 0 11 6 1
    V_V7 N16976181 6 2
    G_ABM2I2 6 N16975344 VALUE { IF((V(3)-V(6))< 0 , 1.73*(V(3)-V(6)) -1U ,
    + -1U) }
    R_R15 N16955470 N16955473 1 TC=0,0
    V_V17 N16955470 6 0Vdc
    G_G4 6 2 VREF N16955936 0.11
    R_R16 0 N16955493 1 TC=0,0
    D_D12 N169559021 N16975344 DCLAMP
    R_R17 N16955529 N16955532 1 TC=0,0
    C_C21 N16955493 0 1n
    E_E25 3 N16955532 VALUE { {I(V_V18)*100} }
    V_V18 N16955529 2 0Vdc
    V_V19 N16985445 0 0Vdc
    .ENDS
    *$
    .subckt TL431_H8 1 2 3 4
    H_H8 3 4 VH_H8 1
    VH_H8 1 2 0V
    .ends TL431_H8
    *$
    .model DCLAMP d
    + is=1.35e-011
    + rs=0.005
    + n=0.001
    + cjo=4.5e-011
    + vj=0.75
    + m=0.302
    + tt=5.04e-008
    + bv=100
    + ibv=0.001
    *$
  • Hi Kiet,

    Here is the order as specified by the model file

    .SUBCKT TL431 7 6 11
    * K A FDBK

    This means
    7 = K
    6 = A
    11 = FDBK
  • Pin-out.pdfHi Nikhil

    I assume K is cathode and A is Anode

    how about FDBK (feedback ? )

    Cna you please help to map out the pin-out sequence for LT431 ?

    See attached for outline drawing

    Thanks

    Kiet

  • Your understanding about A and K is correct.
    FDBK is the REF pin in the IC.