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UCC28063: PIN9 FLOATING

Patty Chuang
Intellectual 1155 points
Part Number: UCC28063

Hi,

Is it okay to leave pin9 floating? Thank you!

Best Regards,

Patty Chuang

  • 0
    TI__Mastermind 26710 points

    Hello Patty,

    Yes, pin9 (PWMCNTL) of the UCC28063 can be left floating (unconnected) if this feature is not used.
    It does not require any pull-up or pull-down resistor on this pin for the IC to function.

    If someone wishes to observe signal toggling of this pin, for whatever reason even if the PWMCNTL function is unused, I recommend to apply a high-resistance pull-up to VDD, on order of 1Megohm or so, to avoid any significant loading of the VDD rail. 

    Regards,
    Ulrich