UCC21750: Ferrite bead in gate source loop

Hi Anoop,

Thanks for reaching out. Yes, using a Ferrite Bead is highly recommended especially in a high power, fast switching application. It is used to reduce gate ringing and acts like a low resistance value during normal operation. Example part number would be MPZ1608S101A. Place it as close to gate as possible.

Yes, it does add inductance but has been seen to help reduce excessive ringing. Hence choosing one with low R and low X value during normal operation and high R during high frequency operation would be a good practice. Another good option is for the customer to choose to have a footprint for the ferrite bead and choose to use it in case of excessive ringing or can choose not to use it if the ringing isn't that severe.

For more details, please read the app note on ferrite bead by one of our experts:

https://www.ti.com/lit/an/sluaai2/sluaai2.pdf?ts=1690555537187&ref_url=https%253A%252F%252Fwww.google.com%252F

Hope this helps!

Best,

Pratik

Thanks pratik for your time, your explanations are excellent