UCC28064A: UCC28064A PFC choke ZCD polarity dots

Hsu cheng

Part Number: UCC28064A
Other Parts Discussed in Thread: TIDA-010015

How does the UCC28064A PFC inductor ZCD winding polarity be labeled? I use Webench to simulate the result is the same two points, but in other reference designs there are two opposites.

over 5 years ago

0 Hong Huang over 5 years ago

TI__Guru 53495 points

The polarities in your attached picture are correct. You can also refer to the TIDA-010015 for correct polarities on this link:

www.ti.com/.../tidrxc4.pdf

Webench model is correct. Polarity dot connects to ZCD1, or ZCD2, and polarity non-dot to GND. So they are the same to your picture and to TIDA-010015.

There are no differences.

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UCC28064A: UCC28064A PFC choke ZCD polarity dots