Question for Application note AN5734.

shinba · ‎2024-03-11

My company designs circuits and artwork upon request from customers.

We are considering this project based on a customer's request to change the laser power supply to be compatible with worldwide use.

While considering various things, I am also considering a PFC circuit with L4985.

AN5734 : Table 4 on page 27

Is the relationship between Wire type and Wire diameter correct?

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Windings Start pins End pins Number of turns Wire type Wire diameter

PRIM 5 2 70 Single – G2 Litz 0.2Ø x 30

AUX 9 11 5 (spaced) Litz – G2 0.28Ø

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Do you have any information on transformers?

Best regards.

Peter BENSCH · ‎2024-03-12

Welcome @shinba, to the community!

Why exactly do you think the information on wire diameter and wire type is incorrect?

Regards
/Peter

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shinba · ‎2024-03-13

The wire type on the PRIM side is single Grade 2, but the wire diameter is Litz wire.

Also, the wire type on the AUX side is grade 2 Litz wire, but the wire diameter is 0.28Φ.

Is this correct.

Best regards.