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Original question:

UCC27518: Unencrypted PSpice Transient Model is broken

UCC27518: Unencrypted pspice model is broken

Tim Giles
Prodigy 20 points
Part Number: UCC27518
Other Parts Discussed in Thread: UCC27519, UCC27517,

Tool/software:

Can this be fixed?

The unencrypted model is still broken...

Specifically this line (at least) is incorrect

** X_U1_U4 U1_UVLO U1_EN_OK U1_INM_OK DRV AND3 ** 'AND3' is not defined.

(in .SUBCKT UCC27519 IN+ EN VDD OUT GND)

Thanks

Tim

  • 0
    TI__Genius 14145 points

    Hey Tim,

    We have not had the opportunity to fix this model. I have brought this back up to my management to get time allocated to do so but I do not have a timeline on getting this fixed yet. For now, please use the UCC27517 model and the suggestions from the previous thread.

    Thank you,

    William Moore

  • 0 in reply to William Moore
    Prodigy 20 points

    No worries William. I had already tried the UCC27517. The unencrypted version for that part also has an error in it, and though that is easily spotted and fixed, the model itself seems to have poor convergence, making the simulation difficult to run. I can't spend any more time on it right now, so we'll probably use a Diodes inc part initiall; in theory the TI parts could be alternates. I don't really understand why TI uses encrypted models (which presumably DO work) and then not checking the unencrypted parts. (I guess there's very little commercial benefit is the real answer!). Thanks for responding so quickly though. 

  • 0 in reply to Tim Giles
    TI__Genius 14145 points

    Hey Tim,

    Thanks for making us aware of the issues with the UCC27517 model as well. We will put it in our plans to correct as well. In the future, more of our focus will be on creating unencrypted models as we release new parts.

    What is it that you need to verify on the UCC27518 in order to use the TI part as opposed to the Diodes part?

    Thank you,

    William Moore