LT Spice subcircuit models needed

Discussion in 'Programmer's Corner' started by pmartin, Jan 7, 2016.

  1. pmartin

    Thread Starter New Member

    Oct 4, 2015
    I am trying to use LT Spice to model a mixed digital and analog circuit. I have Spice models for most components, and I can make my own for stuff like obscure germanium zener diodes using spec sheets to parameterize standard models, but I find myself stuck on more complex subcircuits.

    I am using a Fairchild FAN7371 hi-side driver (but I could switch to a FAN73711) and have asked Fairchild for a LTSpice model. They apparently supply these only to big customers, not hobby guys. I got a Bspice model (not encrypted) and can use it in LTspice except it depends on other Bspice models I do not have.

    So who has the models for such things? I will need to choose and model a low-side driver and some opto-isolator chips that also seem to be hard targets for finding the Spice models.

    Thanks for any help.
  2. crutschow


    Mar 14, 2008
    Unfortunately a lot of ICs don't have Spice models so it's sort of hit and miss as to whether you can find one.
    Typically I just do a Google search for the part number with "spice model" as a suffix.