How to add the spice model in Qspice for UCC21750-Q1?
The spice model is available at : UCC21750 data sheet, product information and support | TI.com
Mike Engelhardt has a tutorial about “Importing 3rd Party Models into QSPICE”
QSPICE™ Simulator - Qorvo - VIDEOS
For UCC21750, you have to download UCC21750 Unencrypted PSPICE Transient Model
The PSpice Transient Model is a package with PSpice simulation project but its library file is encrypted. You need the unencrypted version for Qspice.
Can we use IBIS model in Qspice ?
For example : ADuM3123 | data sheet and product info Isolated Precision Gate Driver, 4 A Output | Analog Devices