I'm designing a 12V 1A ZETA-topology power converter and used the design in appnote "slyt372.pdf" as a reference. Building the reference circuit in TINA-TI with the MBRS340T3 diode included in the TINA library simulates fine, ~5mV ripple, perfect.
For my application, I'm looking to use a B240 diode instead, so I imported the model into TINA-TI and saw a massive unexpected 100mV oscillation in the results.
Ultimately through troubleshooting I found that the oscillation occurs when the Rs of the diode model is lower than something like 50mOhms, and I'm not too sure why. I also found that the MBRS340T3 model parameters in the TINA-TI library do not match the parameters found in the manufacturer-provided spice models (found here: https://www.onsemi.com/support/design-resources/models?rpn=MBRS340