How to use FQP3N30/FQP3P20 and other MOSFET .subckt spice models in LTSpice

[808eengr]

There are many mosfet models out there that are in a PSpice format and are .subckt. No worry they can still be used in LTSpice really easily. There are countless models from IRF, Fairchild/ON, Diodes Inc/Zetex, Exicon....
They all have a line that starts something like

.SUBCKT FQP3N30 2 1 3

1. First add the proper NMOS or PMOS component.
2. CTRL+Right Click the component
3. Change the Prefix box by adding an X (see screenshot)
4. Change the Value to the name in the .subckt line (see screenshot)
5. Add a .inc statement with a .txt or .lib file with the .subckt models that can be downloaded, or copy the text and place it on the file itself

Attached a zip with example of FQP3N30 and FQP3P20 in an example circuit described on PassDIY to calculate Vgs.

 

[UltimateX86]

Hi

what is the FC parameter you commented ?

thanks