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TPS3851: Question for CWD capacitor value

Lee, Sam
Expert 6025 points
Part Number: TPS3851

Hi team,

A customer wants to confirm the followings.

-. Is it possible to use larger capacitor value than the spec (<1uF) recommended in TPS3851 datahseet?

-. If so, what is max value? And is it possible to use the same equation as following?

twd(standard) = 3.23 x Ccwd(nF) + 0.381(ms)

twd(extended) = 77.4 x Ccwn(nF) + 55(ms)

Thanks,

Best Regards,

Sam Lee

  • 0
    TI__Genius 12630 points
    Sam,

    It is not possible to use a capacitor larger than the recommended value of 1uF. This is because any larger value won't be able to discharge within the allowed watchdog window thus the device will reset. TPS3851 is designed and tested for capacitors between 100pF and 1uF.

    Let me know if you need anything else! Thanks

    -Michael