How to determine a SMPS NTC, EMI Filter and X2 Cap values?

[Thomas Ranz]

Posted on March 25, 2017 at 19:28

Hi:

I have designed a smps using eDesignSuite with a VIPer38LE chip... the Power In is 11.1 watts, 96-144 Vac, 60hz and will run at 60KHZ.  Is there a method for determining the recommended filter components being X2 caps and the Common mode input choke?  Also the NTC?

Thanks, Tom

#common-mode-choke #ntc #x2 #emi-filter

[Richard RENARD]

Posted on May 19, 2017 at 12:10

Hi,

EMI filters from ST are for datalines, not for power lines.

Best Rds

Richard