https://www.power.com/sites/default/files/documents/innoswitch3-ce_family_datasheet.pdf


Looking for the proposed layout, I have a very similar PSU structure ( CM choke-rectifier-bulk cap-InnoSwitch-Ycap ), with no AC-OUT spark gaps. No need more than 8kV ESD testing.

-what is a recommended size of spark gaps across the common-mode choke?
-are this spark gaps is simply reducing the LC tank ( common mode choke with Ycap) quality, to decrease primary-secondary voltage of Innoswitch after the ESD pulse?