LNK3209 output ripple
Posted by: treez
on
Hi,
AN-70 on page 20, shows big output ripple with LNK3209 with bootstrap method......does this same thing happen if the opto method is used instead?
评论
To prevent pulse bunching, add R5 to the feedback circuit.
https://www.powerint.cn/community/forum/ac-dc-conversion-forum/2023/lnk3209-output-ripple idle breakout
Hi treez,
In the special considerations for LNK TN2 - high output ripple is due to pulse bunching which can be observed when the current limit gets stuck (going back and forth from one state to another). Pulse bunching can be observed regardless.
One way to prevent pulse bunching is to add R5 to adjust the feedback.