• State TI Thinks Resolved
  • Locked Locked
  • Replies 2 replies
  • Answers 1 answer
  • Subscribers 16 subscribers
  • Views 318 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.

TS3A27518E: leakage issue on VCC from NO6 pin

user4760726
Intellectual 1195 points
Part Number: TS3A27518E

Hi Team, 

One of my customers encounters an leakage issue on VCC pin. In the scenario of VCC is off, EN is pulling down, IN1 and IN2 are low, customer can see the leakage on VCC pin. is it something expected? if so, don't we have some kind of protection (i.e. diode) inside the IC? Please advised.

Best Regards,

Leroy Song

  • 0
    TI__Expert 5660 points

    Hi Leroy,

    Thanks for reaching out.

    Could you describe more about the "leakage" you are seeing? What is the measured amount of leakage? When the leakage is observed, what is the status of the system? Is there a voltage present on the I/O pins while VCC is powered off? What is the measured current into this I/O pin?

    There is internal protection circuitry for isolation in power-down, but keep in mind that the maximum I/O clamp current is -50 mA (in absolute maximum ratings). If this current is exceeded, the device may not functionally operate or the system may be back-powered (through leakage current at VCC).

    If this current limit is exceeded in the customer's application, you may want to add a current-limiting resistor so that the current at the I/O pins remains within specification.

    Best regards,
    Kate

  • 0
    TI__Expert 5660 points

    Hi Leroy,

    Just checking in to see if this answered your question. I will close the thread for now but please feel free to reach out if you have any additional questions.

    Best regards,
    Kate