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TINA-TI: TINA-TI: Conflicting simulation results between manufacturer SPICE models & TINA-TI model library

Part Number: TINA-TI

Hey there,

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:

  • Hello Rick,   

    Thank you for your inquiry about TINA.  Since TINA is a DesignSoft/TINA program, questions are handled by using the DesignSoft support page:  . 

    The DesignSoft/TINA team is very helpful and this is the most direct way for TINA support.  Please advise by Reply when the issue has been resolved.    



  • Hi Rick,

    I have observed the same. I would import crtitical components by hand using the "New Macro Wizard" tool. Or at least check and modify the SPICE parameters in the "Catalog Editor".

    I aggree that this is kind of annoying sometimes as some of the parameters are very obviously wrong.