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Original question:

LM4030: Errors in creating spice modle in MULTISIM 14.0 with file "LM4030_NA2P5_TRANS.lib"

LM4030: SPICE Model does not work

Dragu Eduard Stefan
Prodigy 10 points
Part Number: LM4030
Other Parts Discussed in Thread: TINA-TI

Hello, 

 I try to simulate LM4030 in LTSpice using the models for version A, B , C of LM4030 and I get an error that says: Unknown parameter: _u1. Would you please give me a subckt SPICE description that works? Thank you.

  • 0
    TI__Expert 7090 points

    Hello,

    This model was created to work with pspice, tina-ti and, pspice for TI. This might be the reason it is not importing to LTSpice correctly.

    Can you try this circuit?

    .SUBCKT LM4030_NA2P5 V+ V- PARAMS: TOL=0
    Q_Q1 V+ N05344 V- NPN1X 10
    .MODEL NPN1X NPN
    V_VREF N06402 V- 1.25V
    E_U1 N05344 0 VALUE {LIMIT(V(N06047,N06402)*1E6,-15V,+15V)} R_U1 N06047
    + N06402 1G
    R_R2 N06047 V+ {IF(TOL==0,11K,IF(TOL>0,11.01K, 10.99K))}
    R_R3 V- N06047 11K TC=0,0
    .ENDS LM4030_NA2P5
    *$

    If that does not work I would recommend to use the model with pspice for TI available for free.

    https://www.ti.com/tool/PSPICE-FOR-TI