Lewispaul: Created page with "'''I want to use a specific MOSFET for simulation, now I can't find any model for LTspice. I just found a datasheet - is there a realistic possibility to transfer the values i..."

2012-12-18T17:40:31Z

Created page with "'''I want to use a specific MOSFET for simulation, now I can't find any model for LTspice. I just found a datasheet - is there a realistic possibility to transfer the values i..."

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'''I want to use a specific MOSFET for simulation, now I can't find any model for LTspice. I just found a datasheet - is there a realistic possibility to transfer the values into LTspice so that I have my own model of this MOSFET? The name of the MOSFET I want to use is Si1499DH.'''

.model Si1499DH VDMOS pchan
+ Vto=-0.85 Kp=9 Rg=9 Rd=30m Rs=12m
+ Cgdmax=0n5 Cgdmin=0n1 Cgs=0n5
+ Cjo=80p Is=25p Rb=50m N=1.13

This is based on a starting point of the Si3445DV, which exists
in LTspice, and then using the data sheet values to modify the
existing model, which is about twice the die area, but is other-
wise very similar. It is not tested, but is an educated guess
from past experience.

As a second alternative, you could select the existing Si3445DV,
which comes with LTspice, and add an "M" multiplier parameter to
scale the die area by 0.5 or 0.6. Ctrl-right-mouse-button click
on the MOSFET and then edit the Value2 attribute to be M=0.5.

Modifying an existing SPICE model - Revision history

Lewispaul: Created page with "'''I want to use a specific MOSFET for simulation, now I can't find any model for LTspice. I just found a datasheet - is there a realistic possibility to transfer the values i..."