Tool/software:
Hi All,
I am simulating the TPS54394 in PSpice for TI.
I started the simulation with the sample data, but it did not work properly.
The output current and output voltage results indicated by the arrows below are incorrect.
I ran the simulation as is. Do I need to do any additional settings?
Best Regards,
Ishiwata
Hi Ishiwata,
Sorry for late response, as our team supporting this part is having Chinese holiday and will be back on 2/5, I think my colleagues missed this thread previously as it was a question for Pspice model team at the beginning.
I just quickly checked the simulation and it seems related with the simulation setup. I just changed the RELTOL (relative accuracy of V's and I's) from 0.01 to 0.002 and the results seems much better. I think further improving the accuracy could get the results even better but there's trade off for simulation speed.
As the downloaded model from TI.com has read-only simulation profile, you can't directly edit it. Firstly you could click the button "New Simulation Profile". In the pop-up window, give a name for the new profile and select inherit from "Startup-fast-trans" (the original simulation profile in downloaded model). That copies all the parameters from the original simulation profile to the new one. And then you could click the "Edit Simulation Profile" button and it is able to edit the new built simulation profile.
I didn't finish the whole simulation. Below is the simulation waveform. You could see that the waveform got better. 0.002 or 0.001 is the spec which I used when building some other Pspice models myself in new products development. I assumed that 0.001 would be better, but it's true that would take longer simulation time.
Thanks,
Andrew
