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UCC27710: Power supply requirement

Takeshi Sasaki
Expert 4480 points
Part Number: UCC27710

Hi team,

Does UCC27710 have any power sequence, timing, any dv/dt requirement to turn on and off for VDD and VHB?

Best regards,

Takeshi Sasaki

  • +1
    TI__Mastermind 22995 points

    Hello Takeshi,

    There is a recommended power sequence to achieve a predicable behavior of the driver outputs relative to the controller signals to the driver.

    We recommend that the VDD power up first, before the LI and HI driver inputs so that the driver output responds to the initial control signals. Target VDD powering up and stabilize at least 5-10us before the driver input signals to allow the driver to be above the UVLO threshold and beyond any UVLO delay times.

    Section 9.2.2.3 in the datasheet recommends a VDD rising time of 20us or longer to avoid any unexpected driver output behavior. The HB bias rising time can also be limited by the boot resistor and is recommended to be beyond 20us if possible.

    Regards,