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  • TI Thinks Resolved

TPS61099: Reverse voltage protection

Expert 5665 points

Replies: 2

Views: 24

Part Number: TPS61099

Hi

The input to the TPS61099 is a 1.4V coin cell battery.  I'm considering adding a pfet at the input for reverse voltage protection but is this even necessary

since the TPS61099 device has UVLO?

Please comment

-Kelvin

  • Hi Kevin:

    Do you concern about customer connect the battery upside down? 

    It's recommend to avoid this risk from mechanical, not only protect the circuit, also guide the end customer the right way.

    If it's need, you could add an idea diode between battery and Vin. Yes, a PFET could help do that.

    But I afraid the UVLO can't protect the battery, as there is a diode integrated the IC from GND to Vin. It allow the native current, and may damage the IC and battery.

    Best Regards

    Minqiu

  • In reply to Minqiu Xie:

    Hi Kevin:

    As long time no hear from your side, I assume the issue is solved. I'll close this post. If you have further question, just reply in below. Thank you!

    Best Regards

    Minqiu

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