UCC28180: PSpice Model Help (TINA-TI) - Urgent :P

Hello Patrick Chew,

The frequency input is set by double clicking on the UCC28180 transient model.
This is the only access you have to the macro model.

The model itself is locked.

VCC is not part of the simulation and so there is no VCC input requirement.

Regards

John

Hi John,

Thanks for your reply. I do have few questions would like to check with you.

1.  In the UCC28180 TINA-TI Transient Reference Design, it does includes the BOOSTCCMDCM, so I would like to check with you it, this model itself is the Boost Diode and MOSFET (series diode and shunt MOSFET) , am I right? 
2. I read the other forum, if i replace BOOStCCMDCM model with other SPICE model, the transient analysis might not be accurate, does it valid? 
3. I did change the macro FREQ from 160kHz to 20kHz, but the fsw (Gate freq) doesnt seem to change. 

Thanks. 

Hi Patrick Chew,

1. I believe you are correct. The BOOSTCCMDCM is is the boost fet and diode switch model.

2 The PSPICE model is an average model used for time independent modelling such as Bode plots. It will not work in a transient analysis which shows variation over time.

3. This like a sounds serious defect. Did you make any other changes to the schematic ?
I will check if I get the same results.

Regards

John

Hi John, 

Thanks for your reply. 

I fixed the other parameter while sweeping the FREQ input. Nothing has changed, I would expect GATE PWM freq varied when i change the FREQ setting, is that right? 

Just out of curiosity, what does the other people do when they wanted to design PFC using UCC28180? Do they get the design using WeBench and then straight build the PFC board; optimize the performance on the board later?