• State TI Thinks Resolved
  • Locked Locked
  • Replies 1 reply
  • Answers 1 answer
  • Subscribers 33 subscribers
  • Views 338 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.

SN65LBC172A: Interface forum

Jeston Mitchell
Prodigy 80 points
Part Number: SN65LBC172A


Hi Team,

I am working with a customer that has questions regarding the short-circuit protection behavior of the SN65LBC172A.

  1. Is a short-circuit condition defined as the condition in which the output current is either sourcing or sinking ≥ 200mA?
  2. When in short-circuit protection, are the outputs being brought into high-Z state?
  3. How long does it take for the SN65LBC172A to recover from a short-circuit condition?

Thanks in advance for your help.

  • 0
    TI__Mastermind 25705 points

    Jeston,

    The short-circuit condition happens when the pin is forced by an external voltage source. For example, if the output pin is set low but pulled high externally, it will sink current. The spec says this sinking current is limited to 200mA max as long as the voltage is less than 12V.

    The output is not in hi-Z but is driving. 

    What happens next depending if the thermal protection is triggered. If the power dissipation doesn't generate enough heat, the device could stay in the short-circuit condition forever.

    Please let me know if you have more questions.

    Regards,

    Hao