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LNK6776-HP with opto feedback

Posted by: treez on

Hi,

Can we use LNK6776-HP with a feedback optocoupler...presumbaly we can, and can just connect it common collector and into a divider into the FB pin...normal TL431 error amp circuit on secondary side?

Which one, Innoswitch, or Lnk6xx6-HP, is better able to be fitted directly below the flyback transformer? (and not suffer noise issues)

Comments

Submitted by PI-Elex on 05/03/2023

Hi treez,

 

Thank you for showing interest with PI products.

As for your inquiry, may I know why do you need feedback optocoupler for your design?

Upon checking LNK6776-HP datasheet, it's intended to eliminate optocoupler and all secondary control circuitry that dramatically simplify power supply designs.

If you want an optocoupler based design, you may check DER-453 here https://www.power.com/sites/default/files/documents/der453.pdf

 

Let me know if you have further inquiries/clarifications.

 

Regards,