UCC24610 POWER DESIGN REVIEW

Hello,

I reviewed the schematic and the UCC24610 looks O.K.  I gave the UCC28740 flyback a quick review and you might consider using an RCD clamp instead of a TVS clamp.  The following link will bring you to an application note that gives tips and tricks to design flyback controllers that have primary fault sensing.  This application note discusses why you should use  an RCD clamp over a TVS clamp.  There is even tips on how setup your snubber across the output rectifier.

https://www.ti.com/lit/pdf/sluaac5

If you need further support with this UCC28740 flyback design, you should repost in the e2e with UCC28740 in thread title, so the appropriate applications engineer can help provide support.

Regards,

Thank you!

Hello,

Thank your letting me know that the advice helped you.

Regards,

Hello,

Thank you again. We implemented the changes, and would like your feedback whenever you have a moment.

Best,

Jonathan

2425.03092024PS.PDF

Hello,

Your inquiry has been received and is under review.

Regards,

Hello,

I reviewed the schematic and it looks like you have added the changes that were recommended.

Please use application note sluaac5 to adjust the RCD clamp and snubber across the SR. 

https://www.ti.com/lit/pdf/sluaac5

Regards,

Hello,

Appreciate the specific feedback. We will make the adjustments.

Best,

Jonathan

Hello,

Thanks for letting me know.

Regards,

Hello,

When you have a moment can you review the adjustments to the RCD clamp and snubber across the SR? 

Best

GE_Power_Supply_Mar_18_24.pdf

Hello,

I reviewed the schematic and placement of the components seem correct.   There is an RCD clamp on the primary switch node and SR across SR FET. You know have to evaluate the circuit to see if adjustments are needed.  Application note sluaac5 should give guidance on how to accomplish this.

You had mentioned that you wanted me to check the RCD clamp across the secondary.  There is not one present.  You can apply one to the secondary switch node if you want.  You should be able apply it similarly to on the primary side.  The object is to clamp the leakage energy and protect the FET.

Regards,