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Original question:

UCC3895: UCC3895

UCC3895: UCC3895

Thomas Flack
Prodigy 50 points
Part Number: UCC3895

I am designing a PSFB using the UCC3895. I'm looking at SLUS157Q, page 8 of the data sheet "OUTPUTS". I see High Output = 250mv TYP, and Low output = 150mv Type.

These parameters are stated for ALL OUTPUT. I don't think this covers OUTA,B,C,D. This does not meet CMOS levels. Please confirm I am reading this correctly.

Thanks

  • 0
    TI__Genius 9790 points

    Hi, Flack

    The output structure of OUTA/B/C/D pin is based on totem-pole, output = 250mv TYP, and Low output = 150mv Type are tested with 10mA source current and sink current.

    it means the pull high resistance is 25ohm of pull low resistance is 15ohm. So UCC3895 cannot drive power MOSFET directly. .

    Yunsheng