• State Resolved
  • Locked Locked
  • Replies 1 reply
  • Subscribers 32 subscribers
  • Views 407 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.

HD3SS2522 CC and Vconn question

kerr chang
Genius 4075 points
Other Parts Discussed in Thread: HD3SS2522

Hi Sir

              I have two question on for and Vconn on HD3SS2522.

1 : HD3SS2522 have mode pin to setting current , Why HD3SS2522 EVM need put pull high resistance on CC pin ? ( ex : R15 - R20 )

2 : If CC pin change to Vconn , Vconn is 5V , but CC pin pull high resistance is connector to 3.3V , When CC change to Vconn ,

     I think 3.3V will be Broken by 5V , How about your idea?  

Thank you so much

  • 0
    TI__Mastermind 36085 points
    Hello,

    The pull-ups are in order to provide an appropiate signaling for USB standard current, 1.5A and 3Amps, using 36KOhms, 12KOhms & 4.7KOhms respectively.

    When VCONN is on you only have a leakage current from the CC pin to 3.3V flowing thru the CC resistor, but you won't broke 3.3V, since the leakage current would be 1.7V/CCResistor.

    Regards,
    Diego.