• State Resolved
  • Locked Locked
  • Replies 3 replies
  • Answers 1 answer
  • Subscribers 62 subscribers
  • Views 268 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.

TPS84250: Light load and rapid Vin drop

Seyedkaveh Mazloomi
Prodigy 50 points
Part Number: TPS84250

Would the following scenario damage the TPS84250 ?

There is a very light load connected to the module and input voltage is disconnected and other circuitry drain the input capacitors faster than the output is dropping. Datasheet says maximum Vout could not exceed input voltage level. So, I was wondering if this scenario where Vout is higher than Vin would damage the module?

What would be a fix / mitigation for this?

  • 0
    TI__Expert 8130 points

    Hi Seyedkaveh,

    Let's make sure I am understanding your scenario correctly. Are you wondering if the part is safe when the input source voltage is "hot-swap" or instantly removed?

    But, for instance, if you have a battery application, where the output is connected to a battery, then hat can cause some problems and there is a possibility of damaging the part. Reverse current happens when there is a higher voltage at the output of a system than at the input. Take a look at a similar post where I believe it can be helpful to your question.

    Regards,
    Alejandro

  • 0 in reply to iAlejandro
    Prodigy 50 points

    Hi,

    Yes, That's pretty much what I'm talking about. Which one of the following is preferred?

    1: Add a diode in series between the output pin and the capacitor, with A on Vout and K on Cap

    or

    2: Have a low Vf diode in parallel with the module with the A on Vout ans K on Vin

  • 0 in reply to Seyedkaveh Mazloomi
    TI__Expert 8130 points

    Seyedkabeh, option 1.

    Regards,
    Alejandro