• State
  • Locked Locked
  • Replies 1 reply
  • Subscribers 62 subscribers
  • Views 306 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.

TPS65930 and non-rechargeable coin cell protection

Richard Borrell
Prodigy 10 points
Other Parts Discussed in Thread: TPS65930

Hello, my question is regarding a non-rechargeable lithium coin cell used as the backup battery for the TPS65930. My product is currently undergoing IEC 60601 testing and the examiners have indicated that there should be a diode between the coin cell and the TPS65930 device to prevent current flowing back in to the battery.

I have no problem adding a schottky diode, but I wondered if there some features of the TPS65930 that deem this unnecessary, and save me from updating the circuit board, again.

Thank you.

  • 0
    TI__Intellectual 1915 points

    Hi, the backup battery charger is disabled by default and require a SW write to turn it on. So there should not be any back current going inside the backup battery. But since a write to this bit is not protected by precaution I'd suggest placing the diode on PCB to prevent any issue.

    Best regards, Alain.