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Original question:

TPS3619: Backup battery switchover problem

TPS3619: enable the freshness seal

senthil kumar
Prodigy 10 points
Part Number: TPS3619

Tool/software:

1) do we need to use separate  timer circuit to get 35ms pulse to VDD to enable freshness sea?
2) During this enable freshness seal, need to maintain less than 35ms on Vdd,  without connecting other pins, PFI, PFO, Vbat. ,is this correct? 

Thanks

Senthilkumar

  • 0
    TI__Mastermind 18820 points

    Hi Senthilkumar,

    A timer circuit is not necessary, utilizing a function generator will work as well.

    The PFI and VBat has to be connected too the VDD and Batt respectively. The other pins not covered by battery freshness seal instruction on the datasheet can be floating.

    Jesse