Hi,

I want your help for desiging my schematic in lt spice 4 which include IRF540 MOSFET i have searched in LT spice yahoo group but i don't get it.

please help me to find
thanks

 

Hello,

Have a look here:
http://www.irf.com/product-info/models/spice/

More can be found here:
http://homepages.which.net/~paul.hills/Circuits/Spice/ModelIndex.html

Bertus

 

I found this but how to use it with any symbol or lib file??

.SUBCKT irf5nj540 1 2 3
**************************************
* Model Generated by MODPEX *
*Copyright(c) Symmetry Design Systems*
* All Rights Reserved *
* UNPUBLISHED LICENSED SOFTWARE *
* Contains Proprietary Information *
* Which is The Property of *
* SYMMETRY OR ITS LICENSORS *
*Commercial Use or Resale Restricted *
* by Symmetry License Agreement *
**************************************
* Model generated on Nov 26, 01
* MODEL FORMAT: SPICE3
* Symmetry POWER MOS Model (Version 1.0)
* External Node Designations
* Node 1 -> Drain
* Node 2 -> Gate
* Node 3 -> Source
M1 9 7 8 8 MM L=100u W=100u
.MODEL MM NMOS LEVEL=1 IS=1e-32
+VTO=4.30281 LAMBDA=0.358584 KP=38.2823
+CGSO=1.31227e-05 CGDO=7.02817e-07
RS 8 3 0.0398646
D1 3 1 MD
.MODEL MD D IS=8.24365e-12 RS=0.00750597 N=1.11224 BV=100
+IBV=0.00025 EG=1.2 XTI=4 TT=0
+CJO=9.16368e-10 VJ=0.748335 M=0.467972 FC=0.5
RDS 3 1 1e+06
RD 9 1 0.0001
RG 2 7 4.87532
D2 4 5 MD1
* Default values used in MD1:
* RS=0 EG=1.11 XTI=3.0 TT=0
* BV=infinite IBV=1mA
.MODEL MD1 D IS=1e-32 N=50
+CJO=2.4738e-09 VJ=0.5 M=0.782135 FC=1e-08
D3 0 5 MD2
* Default values used in MD2:
* EG=1.11 XTI=3.0 TT=0 CJO=0
* BV=infinite IBV=1mA
.MODEL MD2 D IS=1e-10 N=0.4 RS=3e-06
RL 5 10 1
FI2 7 9 VFI2 -1
VFI2 4 0 0
EV16 10 0 9 7 1
CAP 11 10 4.837e-09
FI1 7 9 VFI1 -1
VFI1 11 6 0
RCAP 6 10 1
D4 0 6 MD3
* Default values used in MD3:
* EG=1.11 XTI=3.0 TT=0 CJO=0
* RS=0 BV=infinite IBV=1mA
.MODEL MD3 D IS=1e-10 N=0.4
.ENDS irf5nj540