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UCD3138PFCEVM-026: How to make UCD3138PFCEVM-026 work at input line frequencies up to 800Hz?

Wen qs
Prodigy 10 points
Part Number: UCD3138PFCEVM-026
Other Parts Discussed in Thread: UCD3138A

Hello there，

Can evaluation board UCD3138PFCEVM-026 work at high frequency input line voltage, such as 400Hz and 800Hz ?

If can, are there some modification needed for the source code?

My mailbox is hswqs@yeah.net, look forward to your mail, thank you!

  • 0
    TI__Genius 13570 points

    Hi, QS,

    It is possible for UCD to control PFC with 400Hz line frequency. To do that, it needs fast ADC sampling  rate which can be provided by UCD3138A. But regarding to 800Hz, it will be challenging because of too fast line frequency.

    In source code, you need change ADC sampling rate,  and speed up standard_interrupt, and voltage control loop, and so on.

    Regards,

    Sean