• State TI Thinks Resolved
  • Locked Locked
  • Replies 2 replies
  • Answers 1 answer
  • Subscribers 82 subscribers
  • Views 467 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.

TMS320F28377D: HRPWM jitter under certain circumstances

Brian Wang0
Expert 5200 points
Part Number: TMS320F28377D
Other Parts Discussed in Thread: C2000WARE

Hi Champs,

As far as know, we have fixed the know HRPWM jitter issue(in previous f28035) in our latest devices. However, I did received a feedback from my customer that they can still observe the HRPWM jitter problem in F28377D under certain circumstances.

1. If CMPA and CMPB are used at the same time, the jitter will appear.

2. If phase synchronous is used for multiple phase shifting, the jitter will appear.

3. If B is generated by inverting channel A, the jitter will appear.

I am still trying to repeat their test on my Launchpad. Just want to make sure whether this is a know problem from your side?

Regards,

Brian

  • 0
    TI__Mastermind 24095 points

    Hi,

    There is one example in C2000Ware with both PWMA and PWMB configured for HRPWM, with high resolution deadband included as well.
    C:\ti\c2000\C2000Ware_1_00_06_00\device_support\f2837xd\examples\cpu1\hrpwm_deadband_sfo_v8
    With the method described in the example, there is no jitter expected. Please try this and see if you are able to resolve the issue.

  • 0 in reply to Subrahmanya
    TI__Mastermind 24095 points
    Hi,

    I presume your issue is resolved with above example. If not, please provide more details or feel free to post a new thread if there is any other issue.