berni80
Member level 2
Hi,
I'm designing a 5W AC/DC from 230V to 12V.
I'm a bit confused about X Safety Caps and when/where I need to use them.
In the attached image (from https://www.onsemi.com/pub_link/Collateral/AND8132-D.PDF) they use an X2 caps at the input and then normal caps (E1 and E2) after the
bridge.
Is this approach correct? Why I do not need also E1/E2 as safety caps?
If E1/E2 fail the result is very similar to a failure of the input cap.
Is there any standard related to their use?
Thanks!
I'm designing a 5W AC/DC from 230V to 12V.
I'm a bit confused about X Safety Caps and when/where I need to use them.
In the attached image (from https://www.onsemi.com/pub_link/Collateral/AND8132-D.PDF) they use an X2 caps at the input and then normal caps (E1 and E2) after the
bridge.
Is this approach correct? Why I do not need also E1/E2 as safety caps?
If E1/E2 fail the result is very similar to a failure of the input cap.
Is there any standard related to their use?
Thanks!