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UCC28064A: How to meet Level VII?

Chris Wang
Prodigy 90 points
Part Number: UCC28064A
Other Parts Discussed in Thread: TIDA-010015, , UCC25640

Tool/software:

The design of TIDA-010015 has a no load power of approximately 200mW, which does not meet the Level VII no-load loss requirement of within 150mW.

How to improve the design of TIDA-010015 to meet the requirement of Level VII no load power within 150mW?

Thank you.

  • 0
    TI__Guru 50090 points

    Hi Chris,

    As I shared in the other post, the UCC256614 can disabled the PFC controller when the UCC256614 enters into burst mode as shown here:

    I hope this answers your question. 

  • 0 in reply to JCHK
    Prodigy 90 points

    Is there any way for the UCC28064A+UCC25630 to meet the Level VII no-load power requirement of 150mW?

  • 0 in reply to Chris Wang
    TI__Guru 50090 points

    If you tie VSENSE to GND, you will achieve the minimum standby power with the LLC still running. WIth this, the two IC's alone should be under the 150mW requirement, but I am not sure about the rest of your system. If you have an auxiliary supply and an MCU, you can put the LLC into a standby mode as well. 

    Note: the UCC25630 series is not recommended for new designs. The UCC25640 is pin to pin but a few component changes are required as per this application note.