UCC28070: UCC28070 simplis model

Hello Norman,

Please refer to this previous E2E thread concerning an unreleased Simplis model for the UCC28070: https://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/996498/ucc28070-simplis-model-for-ucc28070 

It is not clear whether that model has been thoroughly debugged or not, but you can give it a try.

Regard,
Ulrich

Hi Ulrich,

Seems like both the start-up and ac model model is running, question is, will i get thesame result as the Spice model for the AC and start-up analysis?

Do you also have the simplis transient model, we are designing a new PFC ckt usingUCC28070 and I wanted to get simulation results first before going into actual lay-out. This will help me focus on using the part instead of looking at other similar devices from different vendor.

Thanks,

Norman

Hello Norman,

Since a transient model was not included in the .zip file, I suspect that TI may not have such a model but I need to find someone within TI who has access to unreleased models to verify. I may not get a reply right away, so please allow me a few days to search for this.

Regards,
Ulrich   

Thanks Ulrich, hoping to get feedback soon. By the way, if i do dynamic load on the o/p using the start-up model, will I expect an accurate results? or I will need a real "transient model" to get what I really need to see during dynamic loads?

Thanks,

Norman

Hello Norman,

I finally got access to the modeling repository, and I confirm that the AC model and the Startup model are the only two Simplis models available for UCC28070.  Since startup is a fairly dynamic process, I imagine that that model should also be able to handle dynamic loading after startup is complete, although it may take a long time to simulate.  

As mentioned earlier, these two Simplis models are unreleased and as such I cannot vouch for their accuracy or completeness.
They are provided to you "as is" and hopefully will result in useful simulations for your application.

At this point, I will need to close this thread.
Regards,
Ulrich

Thanks Ulrich, do I expect a formal TI release for these 2 simplis models so we can rely on the results moving forward? it really helps a lot on my side to tune out the loop and see the start-up behavior and even see the dynamic response but I'm just worried on the results since TI is confirming it's accuracy.

Thanks Ulrich, do I expect a formal TI release for these 2 simplis models so we can rely on the results moving forward? it really helps a lot on my side to tune out the loop and see the start-up behavior and even see the dynamic response but I'm just worried on the results since TI is not confirming it's accuracy.

Understood, thanks Ulrich, by the way do you have running PSPICE ckt for both start-up and average models. I'll just probably need to learn how to use it but will help me a lot if i can have a working spice simulations for both start-up and average models for UCC28070 for my reference, i'll start with that

Thanks,

Norman