• State TI Thinks Resolved
  • Locked Locked
  • Replies 1 reply
  • Answers 1 answer
  • Subscribers 33 subscribers
  • Views 383 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.

Original question:

HD3SS3220: ID pin not going low

HD3SS3220: Pull-up from Vbus_det

TISL
Expert 4630 points
Part Number: HD3SS3220

Dear e2e Support,

My customer is facing the same issue as this post, using our IC in DRP mode: it works only when the pull-up from Vbus_det is removed.

Is there a mistake  in our datasheet?

Should we use a different pull-up?

Regards,

  • 0
    TI__Expert 4325 points
    Hi,
    The datasheet is correct. Most likely the customer is not properly controlling VBUS. VBUS cannot be always present. Per Type-C spec, VBUS must be disabled while there is no connection. It can only be enabled when the CC pin detects device attachment when port is a source
    (DFP), or dual-role (DRP) acting as source (DFP). VBUS power switch enable (active low) should be controlled by the ID pin of the HD3SS3220 for proper operation.
    Regards,
    Brian