Opto coupler selection for LNK TN family switcher (buck converter)
Hi all,
I'm designing a small smps based on LNK3204 or LNK304. For this I choose the opto-coupler feedback as described on page pp.6 (https://www.power.com/sites/default/files/product-docs/lnk302_304-306.pdf)
The question is : What are the opto coupler parameters selection (CTR, Ton/Toff, Vf, ... etc) ?
Best regards,
Comments
Hi,
Thanks for the Toshiba reference. Could you be so kind to point me some calculation on regulation process where CTR opto-isolator is involved inLNK Family controllers ?
The input current Ifb of your LNK Famly is something Ifb=49uA, please could you provide us some equations or best any Spice model of the controller in order to simulate the overall regulation behaviour
Best regards, H
Hi Bibha,
Good day!
Please attach file for your reference.
Thanks
Regards
PI-Chloe
Attachment | Size |
---|---|
Opto Feedback.png | 40.8 KB |
Hi,
For an optocoupler feedback design, you'd want a fast Ton/Toff with high CTR. You can refer to the link below if you want more details regarding optocoupler selection.
Link:
https://toshiba.semicon-storage.com/info/docget.jsp?did=13438
Regards,
PI Jodec