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UCC27511A: Resistor between the OUTH pin and OUTL pin

Shuji Ishiwata
Mastermind 7825 points
Part Number: UCC27511A

Tool/software:


Hi All,


I have a question about how to select R1 and R2, which are listed on the datasheet.
I would like to drive an N-ch FET with as little delay as possible. In that case, should both R1 and R2 be set to 0 Ω?


Best Regards,
Ishiwata

  • 0
    TI__Expert 8660 points

    Hi Ishiwata-san,

    Selecting R1 and R2 is a very iterative process. I would start off with 0ohm and test on bench to see if there's any overshooting or undershooting. If there is any overshooting/undershooting, then increase the resistance until you find the balance between rise/fall time and overshoot/undershoot (as long as it's within the abs max specs).

    Here's an app note covering gate resistors: https://www.ti.com/lit/ab/slla385a/slla385a.pdf

    Thanks,
    Rubas