UCC28063 maximum frequency limitation

Kuo Nowal

Expert 2315 points

Other Parts Discussed in Thread: UCC28063

Hi sir,

May I know what condition UCC28063 frequency will be limitation ?
UCC28063 have maximum output frequency?

over 9 years ago

0 John Griffin1 over 9 years ago

TI__Mastermind 34465 points

The UCC28063 is a transition mode pfc controller and it does not have a fixed
switching frequency. The frequency varies with input voltage and with the load.
The maximum switching frequency will occur at max Vac and light load.
Max frequency occurs close to the AC zero crossings
It is normally of the order of a few 100kHz

Hope this helps.

Regards,

John

0 Kuo Nowal over 9 years ago in reply to John Griffin1

Expert 2315 points

Hi sir,

Thanks for your reply.
BTW, Could you help us to comment we switch frequency when we run univerial 90Vac~264Vac?

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UCC28063 maximum frequency limitation