• State TI Thinks Resolved
  • Locked Locked
  • Replies 1 reply
  • Answers 1 answer
  • Subscribers 63 subscribers
  • Views 154 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

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.

UCC21540: UCC21540 question

Maor Matityahu
Intellectual 600 points
Part Number: UCC21540

Hello,

I am using the UCC21540DW driver for boost converter to drive top side cooling SIC fets.

The fets have 2 ohm gate resistor inside them.

Can i remove the external gate resistors (to make the layout more effective and small)?

Thank you

  • 0
    TI__Expert 8446 points

    Hi Maor,

    I do agree that making the layout more small would have a better performance, but there are a couple of things to consider.

    Although the FETs have gate resistance, we strongly recommend to have a gate resistor socket there even if a 0 ohm resistor is being used. This gate resistance is one important knob for optimizing the performance of the switching stage. To add to this, adding a little gate resistance externally will prevent noise from the gate of the FET from directly propagating into the gate driver which could potentially damage the device. With a small amount of external gate resistance, it can protect the gate driver from potential damage.

    Hope this was helpful!

    Regards,

    Hiroki