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UCC29910A: for a Single-phase 460Vac Buck APFC

Viktorija Cecil
Mastermind 18491 points
Part Number: UCC29910A
Other Parts Discussed in Thread: UCC28070

I am evaluating UCC29910A for a Single-phase 460Vac  Buck APFC, 1kW, output 300V. Do you have any design concerns or comments of using UCC299110A for my chase?

Thanks

Viktorija

  • 0
    TI__Mastermind 27145 points

    Hi Viktorija,

    1kW output power is too high for a single phase buck PFC topology. I would suggest using an interleaved CCM PFC such as UCC28070 and use a downstream DC/DC converter to obtain 300Vdc output.

    Best Regards,

    Ben Lough

  • 0 in reply to Benjamin Lough
    TI__Mastermind 18491 points

    Thanks for the reply. Customer is asking:

    If I use UCC28070, it becomes a boost APFC+ DC/DC Buck, two-stage may increase cost and reduce efficiency.

    Right now, I still focus on one-stage Buck APFC approach with 500W target first. Do you think using UCC299110A to achieve 500W/300V output is okay?

    Thanks

    Viktorija

  • 0 in reply to Viktorija Cecil
    TI__Mastermind 27145 points

    Hi Viktorija,

    I don't think buck PFC is a good choice for this application, Buck PFC does not conduct when the instantaneous AC input voltage is less than the DC output voltage. With a 460Vac input and 300V output, the conduction angle will be quite narrow and will make it challenging to achieve good power factor. 

    Best Regards,

    Ben Lough