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LM25149-Q1: Question about Errata in preliminary datasheet

Part Number: LM25149-Q1

Hello Team,

I have a question about Errata of preliminary datasheet.

Q. I'm not sure the technical reason why external boot diode is needed for the workaround of this.

Can you describe detail about the relationship between the external boot diode and the zero-cross detection shift?

Thanks,

Yuta Kurimoto