Hi,

We have an power supply card,
In that input side we have Adapter, Type C and Lion battery
Output side we generate three outputs 5V/2A, 5V/3A X 2.

My question is for protecting against internal and external EMI where we need to add filter input side or output side?

How to decide that?

Kindly clarify!

 

Hi,

We have an power supply card,
In that input side we have Adapter, Type C and Lion battery
Output side we generate three outputs 5V/2A, 5V/3A X 2.

My question is for protecting against internal and external EMI where we need to add filter input side or output side?

How to decide that?

Kindly clarify!

Measurements are needed to set a design specification - otherwise you are just stabbing at ghosts in the dark.
How much EMI are you sensing? How much are you generating? What is the maximum you can accept? What attenuation factor do you need?