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TPS61099: Reverse voltage protection

Kelvin Le THS
Expert 6475 points
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

  • 0
    TI__Mastermind 21565 points

    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.

  • 0 in reply to Minqiu Xie
    TI__Mastermind 21565 points

    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!