• State Resolved
  • Locked Locked
  • Replies 4 replies
  • Answers 1 answer
  • Subscribers 16 subscribers
  • Views 1003 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.

SN6505A: About disorder of switching issue

Tsukui Yusuke
Guru 21930 points
Part Number: SN6505A

Hi,

Switching disturbance of D1/D2 is occurring on customer's board.
Could you check the attached file?

SN6505A.pdf

Is there a possibility that On time is doubled or shortened due to noise?
I would like your advice on this issue.

Best Regards,
Yusuke

  • 0
    TI__Expert 6955 points

    Yusuke -san,

    I haven't seen this before and I have not heard of noise affecting the on-time. I see in the included PDF that current starts to ripple after the on-time anomaly. Does any event in the system occur at the same time of the anomaly such as the addition of extra load? Do you know the ambient temperature that the system is operating in? Also, would you be able to provide a schematic? This would help me view other components that may be influencing this behavior. 

    Respectfully,

    Lucas Schulte

  • 0
    Guru 21930 points

    Lucas-san,

     

    Thank you for your response.

    "Does any event in the system occur at the same time of the anomaly such as the addition of extra load?

    Do you know the ambient temperature that the system is operating in? "

    →I'll check it and get back to you.

    　By the way, If the noise is applied to the VCC or CLK pin, do you happen is such a phenomenon?

     

    I would like to send the customer schematic to you.

    My e-mail address : tsukui-y@macnica.co.jp

     

    Best Regards,

    Yusuke

  • 0 in reply to Tsukui Yusuke
    TI__Expert 6955 points
    Yusuke-san,

    I have emailed you a request for the schematics. At this time we will continue to investigate the issue and post the resolution on e2e.

    Respectfully,
    Lucas Schulte
  • 0 in reply to Lucas Schulte9
    TI__Genius 17100 points
    Yusuke-san, all,

    TI is reviewing schematics and measurements provided for this case. Potential solutions are in discussion and will be posted once resolved.


    Thank you,
    Manuel Chavez