• State TI Thinks Resolved
  • Locked Locked
  • Replies 1 reply
  • Answers 1 answer
  • Subscribers 30 subscribers
  • Views 376 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

DRV8301: Maximum gate driving current design

user6172187
Prodigy 90 points
Part Number: DRV8301

Hi,

I am looking into some gate drive control register, about the gate current setting, how will if affect our design if we choose different driver current? 

Thanks

  • 0
    TI__Guru 65390 points

    Hello,

    Thanks for posting on the MD forum!

    You need to check the signals of your FET, measure using a scope from Gate to Source and check if there is any overshoot/undershoot/ringing.

    Also please check the rise time and fall time of your switch node and see if it's acceptable.

    Raising or lowering the gate current will speed up or slow down your output rise time. If it becomes too fast then you could have ringing issues or overshoot/undershoot which is undesireable.

    If the gate current is too low then you may stay in the resistive region of the FET turn ON/OFF too long and your FETs will heat excessively.

    This post discusses this more: https://e2e.ti.com/support/motor-drivers/f/38/t/796378

    Regards,

    -Adam