Simulation error in UCC28070

Ali Sadeghian

Part Number: UCC28070
Other Parts Discussed in Thread: TINA-TI

Tool/software: TINA-TI or Spice Models

Hi,

I have simulated UCC 28070 using the unencrypted version of the spice model (transient model) but not able to run the simulation and get the result. Please. I have attached the simulation file (SIMPLIS and LTspice) here and I will be appreciate if someone can take a look at those and find the potential problem.

Thanks,

Ali

over 6 years ago

0 Herman Theodorus over 6 years ago

TI__Genius 9775 points

Hi Ali,

FYI, We're looking into this.

Herman

0 Arpan Gupta over 6 years ago

TI__Expert 3140 points

Hi Ali,

The unencrypted PSPICE model can be imported in SIMETRIX (not in SIMPLIS). Please double check on that.

Also, I observed the connections are not proper in your design. Could you please refer to the below thread to understand the model usage?

https://e2e.ti.com/support/tools/sim-hw-system-design/f/234/p/785772/2908037#2908037

Kindly note that the model is derived from Average model. We will not observe switching pulses at GDA & GDB pins. Hence, instead of using MOSFETs, we need to use BOOST_AVG module in our design. If you have any doubt, please refer to the released PSpice transient test schematic.

Thanks & Regards,

Arpan Gupta

0 Ali Sadeghian over 6 years ago in reply to Arpan Gupta

Prodigy 20 points

Arpan,

Thanks for your reply. I used the SIMETRIX for the simulation as you suggested but still have the problem.

Is using the BOOST-AVG model is the only way I can use for simulation?

Thanks,

0 Arpan Gupta over 6 years ago in reply to Ali Sadeghian

TI__Expert 3140 points

Hi Ali,

Yes, the transient model has some limitations. We need to use BOOST_AVG module to make it work.

Thanks & Regards,

Arpan Gupta

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Simulation error in UCC28070