• State Resolved
  • Locked Locked
  • Replies 3 replies
  • Subscribers 62 subscribers
  • Views 179 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.

UCC28065: UCC28065;Applicationnote;Convert UCC28064A EVM to Higher Switching Frequency Using UCC28065

fujita michitaka
Prodigy 160 points
Part Number: UCC28065
Other Parts Discussed in Thread: UCC28064A,

Hi TI team,

Application note;Convert UCC28064A EVM to Higher Switching Frequency Using UCC28065

Is there an application note for the 700W module?

Best regards.

  • 0
    TI__Genius 10555 points

    Hello, the process in the app note of converting the UCC28064A EVM 300W design to using the UCC28065 at higher frequency would also apply to a 700W design looking to do the same.

    Here is a 700W reference design based on the UCC28064A : www.ti.com/tool/PMP21366

  • 0 in reply to Ray DiCecco
    Prodigy 160 points

    Thank you for your reply.

    Do you know the constants of parts that can be changed when the 700W module is changed to ucc28065?

    For 300W module,the constants of the parts in the table below can be changed.

    Excerpt from application note;Convert UCC28064A EVM to Higher Switching Frequency Using UCC28065.

    Best regards.

  • 0 in reply to fujita michitaka
    TI__Genius 10555 points

    My impression was that you were interested in changing an existing 700W design which is using a UCC28064A to one using a UCC28065. If you are actually looking to modify the UCC28064A EVM to accommodate a 700W design, then it's bit more extensive than changing out just those few components to take advantage of the higher switching frequency that the UCC28065 offers over the UCC28064A.  Primary factor is the higher power level will require larger FETs, modifying the input current sense resistor and likely changing the boost inductors as well as the output capacitors.

    If that is your intent, then I suggest you start with the UCC28064A Webench tool to get the correct component values for 700W. I believe you will then be able to use the same values provided in the app note for Rtset, Rbrst and Rphb, but you should then use the UCC28065 Excel tool to verify other component values based on your desired results. The STF33N60M6 FETs may still be adequate but there likely are better choices.

    Webench design tool for UCC28064A which will give you a complete BOM and schematic.  https://www.ti.com/product/UCC28064A?keyMatch=UCC28064A&tisearch=search-everything&usecase=GPN#design-development##design-tools-simulation

    UCC28065 Excel design tool https://www.ti.com/lit/zip/sluc645