• State Resolved
  • Locked Locked
  • Replies 1 reply
  • Subscribers 63 subscribers
  • Views 417 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

UCC28180: Gate waveform in simulation

Hirotsugu Kobayashi
Mastermind 9530 points
Part Number: UCC28180

Hi, team.

The gate waveform (Vg) of the UCC28180 reference design (SLUM529) is as attached.

Is this waveform correct?

How do I get the correct waveform?

  • 0
    TI__Mastermind 31580 points

    Hi Hirotsugu-san,

    The model for the UCC28180 is an averaged model and not a switching model. The average model is like a mathematical model for the controller and the power stage is also an average model, so you will not see a PWM gate drive signal.

    TI does not have a switching model for the UCC28180 PFC controller because the simulation times can be very long due to the fact that the switching frequency can be in the region of 100kHz but becaus ethe AC line frequency is low, 50/60Hz and the voltage loop is slow, 10Hz BW it can take a very long time to simulate the circuit and get it into regulation.

    The average mode provides much quicker simulation times.

    Regards

    Peter