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UCC21225A: Need help getting the UCC21225A PSpice model and schematic working at 1MHz vs 100kHz.

Joseph Sanchez
Intellectual 360 points
Part Number: UCC21225A

Need help getting the UCC21225A PSpice model and schematic working at 1MHz vs 100kHz.

  • 0
    Intellectual 360 points

    Figured it out.  Just need to tweak the DT resistor.

  • 0 in reply to Joseph Sanchez
    TI__Guru**** 189401 points

    Hi, Joseph,

    Thanks for letting us know!

    By the way, if you're using a large value DT resistor, please heed this advice in the data sheet:

    "It should be noted that the UCC21225A dead time setting is decided by the DT pin configuration (See Programmable Dead Time (DT) Pin), and it cannot automatically fine-tune the dead time based on system conditions. It is recommended to parallel a ceramic capacitor, 2.2-nF or above, close to DT pin to achieve better noise immunity and dead time matching.

    Let us know if you have any other questions.