LNK306: soft-start with optocoupler ?
Posted by: M.gaschet
on
Hi,
I'm not sure if this question has already been posted since there is no Search Tool ??
Is there a way to implement a soft-start using a LNK306 in a High-Side Buck - Opto FB topology ?
Thanks
Maxime
Maxime -
You should be able to setup a soft start feature in your application by placing a cap across your output zener diode. This will provide additional current through the opto-LED before the zener diode turns on.
As a side note, if your application doesn't specifically require the high-side configuration, conducted/radiated emissions will likely be simplified by going to the low-side configuration.
-The Traveler