• State TI Thinks Resolved
  • Locked Locked
  • Replies 1 reply
  • Answers 1 answer
  • Subscribers 63 subscribers
  • Views 129 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

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.

TPS53353EVM-744: Why the converter can operate normally even I remove the ripple injection circuit?

Jayden Li
Intellectual 2205 points
Part Number: TPS53353EVM-744

I removed the ripple injection circuit and want to verify the stability, pulse burst phenomenon should occur because the stability condition is not satisfied. However, the converter still operates normally and no pulse burst phenomenon occur. Only the jitter performance is damaged. I also simulated in PSpice with the model provided in ti.com and the result is same. This result which is not consistent with theory really confused me.

  • 0
    TI__Mastermind 35115 points

    Hi Jayden,

    Even though the switching is stable without the RCC in steady state, there may be low phase margin in the loop. With low phase margin you would see output oscillations and bursting behavior during a load transient. I tried this out myself and do see this with a 10A load step with 1µs rise/fall time.

    Anthony