• State TI Thinks Resolved
  • Locked Locked
  • Replies 1 reply
  • Answers 1 answer
  • Subscribers 63 subscribers
  • Views 551 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.

LM317: Power supply with LM317

Shelton Li
Prodigy 100 points
Part Number: LM317

Hi team,

There has a question about LM317.

If the LM317 shuts off the input and the output is connected to 18V power, is it possible to do this?

Thanks.

  • 0
    TI__Genius 12511 points

    Hi Shelton,

    The LM317 has no ability to power down a voltage rail.

    Are you saying if the input is brought to 0V and the output is set at 18V causing a reverse voltage condition?

    If so, this will cause a reverse current to flow out from the input pin of the device. Anything on the input rail that cannot sink current may be damaged. As for the LM317 itself, it is a bipolar device, however at 18V of reverse voltage an external protection diode would be recommended in order to protect the device from the condition.

    Regards,

    John