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UCC28070: Design bridgeless PFC with UCC28070 - Patent issue

Part Number: UCC28070

Hi,

I am an R&D engineer in a company that produce AC-DC power supply.

We want to design 750W power supply.

We want to use the bridgeless PFC proposed in one TI AN https://www.ti.com.cn/cn/lit/an/slua517/slua517.pdf?ts=1607408093230&ref_url=https%253A%252F%252Fwww.google.com%252F

We want to check if own company developed and using this circuit topology have any problem with Delta patent as I known Delta own many patents on Bridgeless boost PFC.

Even though the AN used UCC28070 (TI PFC controller IC), but the circuit topology is quite similar to Delta patents on Bridgeless PFC.

Thank you.