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UCC27714: HB-HS inter-shoot for UCC27714

Yuxi Liu(Tony)
Expert 3070 points
Part Number: UCC27714
Other Parts Discussed in Thread: UCC28951,

Hi TIer

My customer EDAN is follow slua560d to design 2KV/2000W output Phase-Shifted Full-Bridge Power supply.

They were designed using the UCC28951+UCC27714, and they have been tested several times "HB-HS inter-shoot for UCC27714".

They want to find out why and see if this design is mature and ready to use? Do we have other 2KV/2000W PSFB solution can promote?

In addition, the customer would like to know how to adjust the chip's peripheral circuitry to modify the operating duty cycle of the UCC28951.

Thank you very much.

28951 and 27714 also in primary side, BUS voltage is 400V after PFC.

Schematic is show in attachment.

Could you help me check is there any reason will tend UCC27714 to be HB-HS inter-shoot . Do we have some improve methods?

  • 0
    TI__Genius 14145 points

    Hey Tony,

    Thank you for reaching out regarding your questions with the UCC27714.

    I am the applications engineer that support the UCC27714 and cannot comment on the operation of the UCC28951. You will need to create a separate thread tagging that product for that team to follow up and provide support for that.

    For the UCC27714, I do not see any issues with the schematic other than VDD being 18V with the 5.1 Ohm series resistor. This part is rated at 20V Absolute Max on the VDD pin. So it would be good to measure that and be sure that that is not getting violated.

    SLUA560D is a reference design that is for 600W. So, the system would need to be designed accordingly to support 2kW. We do not have a reference design that I am aware of for that exact setup of 2kW/2kV.

    Can you please explain what you mean or share scope captures for HB-HS inter-shoot?

    Let me know if you have any further questions.

    Thank you,

    William Moore

  • 0 in reply to William Moore
    TI__Genius 14145 points

    Hey Tony,

    Have you been able to find a resolution to this? If so, please let me know what you have found. If not, please update me on the status of the issue.

    Thank you,

    William Moore

  • 0 in reply to William Moore
    TI__Genius 14145 points

    Hey Tony,

    I am going to mark this closed at this time. If you do have updates, questions, or responses to my above questions, please feel free to reopen this thread.

    Thank you,

    William Moore