EMI filter LNK362
Posted by: mkilicaslan
on
Hi,
I am using LNK362 in my SMPS circuit but it fails EMI test at about 200 kHz. What do you suggest me to pass EMI test? You can find the circuit and EMI result in attachment.
Best regards,
Mehmet
Comments
Hi Pike,
You can now find the documents in attachment. I made the test in a EMC laboratory according to a specific standard. They powered the device by LISN.
| Attachment | Size |
|---|---|
| emi_test.PNG (39.06 KB) | 39.06 KB |
| smps.JPG (177.15 KB) | 177.15 KB |
Hi PIke,
Could you help me about above problem?Thanks!
Mehmet
Hi mkilicaslan,
Can I ask what's the application of the power supply? Have you tried putting X-capacitors? Also try adding another inductor on the positive side of the pi filter.
Regards,
PI-Pike
Hi mkilicaslan,
Can you please reupload your schematic circuit and EMI results? There were no files attached in your post. And also, what is your EMI setup? Is it secondary ground or floating ground? Thanks!
PI-Pike