• State TI Thinks Resolved
  • Locked Locked
  • Replies 3 replies
  • Answers 2 answers
  • Subscribers 13 subscribers
  • Views 522 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.

SN6507: Short Circuit protection

Yang Wu
Expert 3320 points
Part Number: SN6507

Tool/software:

Hi team,

My customer tested short circuit on SN6507 EVM in room temp. It found IC temp can be up to 120 degrees during short circuit. Is this normal behavior? measure the SS pin voltage and found it's ~1.3V and then becomes 0 when short circuit happens.

In addition, how to understand "voltage dip is lower than 2.5 V"? does it mean voltage drop (Vt2 - Vt1 < 2.5V) lower than 2.5V? Because when there has no short circuit condition, the SS pin voltage is always 1.3V.

thanks a lot.

Best regards,

Yang

  • 0
    TI__Guru 55815 points

    Hi Yang,

    Thank you for reaching out.

    Yes, the temperature is expected to increase during short-circuit condition due to an increase current.

    Regarding the voltage at SS pin, please ignore the voltage observed. Based on how the output is shorted, it could create a soft-short or a hard-short.
    Let me know if you have any other questions, thanks.


    Regards,
    Koteshwar Rao

  • 0 in reply to Koteshwar Rao
    TI__Expert 3320 points

    Hi Koteshwar,

    Thanks for your reply. You said the temperature is expected to increase during short-circuit condition due to an increase current. now customer found it's 120 degrees in room temp. the max Ta will be 85 degrees which will case Tj > 150 degrees. Does there has temp shutdown to protect the device? 

    Best regards,

    Yang

  • 0 in reply to Yang Wu
    TI__Guru 55815 points

    Hi Yang,

    Yes, the device has thermal shutdown (TSD) feature. Please see below snapshot from datasheet.

    Please note that occasional short circuit conditions and temperature increases are not a concern, sustained operation in those conditions could lead to a device damage. Please make sure customer removes the short circuit once it is detected and doesn't leave it as is for long periods. Thanks.


    Regards,
    Koteshwar Rao