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LNK3209 feedback for low standby power

Posted by: treez on

Hi,

Is the attached a good way to do feedback for LNK3209 when low standby power is wanted?.

Also want a fairly accurate 24V

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LNK3209 opto feedback.jpg 117.48 KB

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Submitted by PI-Elex on 05/17/2023

Hi treez,

 

Thank you for using PI Product.

 

As for your inquiry, it would be best to still include R5, C3, and D2 below as shown in the Applications Example from the datasheet. R5 supplies the BYPASS pin externally for significantly lower no-load input power and increased efficiency over all load conditions.

Also, you may remove R10 in your schematic, since your feedback divider R3 and R4 already acts as the pre-load.

 

Regards,

Image removed.