Hello,
I have been looking at some power supply (AC to DC) circuit designs and there is at least one thing that has made me think "Why?"
Quite comfortable to understand the input circuit which includes Protection, Filter, switching circuit but when it comes to say 24V DC output I see there are a couple capacitor connected between (+24V and Earth) and (Return and Earth).
This is selective and not seen in all the designs.
I have below question to ask on this:
1. Are these capacitor for EMI protection and work as Common mode filters or for Surge Events??
2. Why these are not in all the designs??
3. If this is beneficial for the product how do we select the capacitor values in terms of Farads and Voltage??
Thank you.
I have been looking at some power supply (AC to DC) circuit designs and there is at least one thing that has made me think "Why?"
Quite comfortable to understand the input circuit which includes Protection, Filter, switching circuit but when it comes to say 24V DC output I see there are a couple capacitor connected between (+24V and Earth) and (Return and Earth).
This is selective and not seen in all the designs.
I have below question to ask on this:
1. Are these capacitor for EMI protection and work as Common mode filters or for Surge Events??
2. Why these are not in all the designs??
3. If this is beneficial for the product how do we select the capacitor values in terms of Farads and Voltage??
Thank you.
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