• State Resolved
  • Locked Locked
  • Replies 1 reply
  • Subscribers 63 subscribers
  • Views 148 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.

USB 5V Output

Jared Becker
Genius 11845 points

Hi Team,

I am trying to use a dedicated USB charger (AC to DC wall wart + USB cable) to create 5V and connect to a board that will drive LEDs. On the board with the LEDs, do I need a device that will allow the USB charger to provide current to my board? Essentially, does my LED board need to perform some sort of handshake with the USB wall wart in order to receive power? If the answer is "yes", and you have a recommendation, that would be greatly appreciated.

Thank you!

Jared

  • 0
    TI__Expert 6430 points
    Hi Jared,

    It depends on what kind of port you have in your board.

    If it's a micro B or mini B type of port then you need nothing for handshake. Type-B port have 5V available at all the time. However, if you need more than 500mA then you might need BC1.2 support, BC1.2 is not required for currents less than 500mA in a Type-B port.

    If it's a USB Type-C port then you need to have a basic pull-down of 5.1K on both the CC lines as long as the VBUS voltage is limited to 5V, for higher VBUS voltages you'll need PD controllers.

    Please let me know if you have further questions.

    Thanks,
    Rahul