what's about the Electromagnetic Immunity and Electromagnetic Emission of the DC2039A kit and, in general, of the evaluation boards from Linear Tecnologies / Analog Device?
It depends on the particular board. We do not perform EMI testing on all of our demo boards and there is no data for DC2039A. This remains up to the customer to verify, which makes sense because it will vary greatly depending on the layout and component choices.
There are ways to mitigate EMI in this circuit if that becomes necessary.
Thank you Zack.
The original desing is not bad, there is the ground plane and the inductor is shielded.
In my design I cut the ground plane in the swtich area so to reduce the coupling and reduce the loops.
My dubt is about the input EMI filter and the output EMI filter.
Do you have any suggestion? any useful application note?
Yes, I do have a few application notes that I generally look at for EMI and layout considerations.
General switcher layout and EMI:
Snubber design (if that becomes necessary):
Other filtering techniques:
So I suppose my suggestion would be to follow the layout guidelines and leave footprints on your layout for a snubber and some input/output filtering based on those documents. Test without the filtering first, and see if you have an issue.
Thank you again.
Well known the application notes you added.
I already left the space for the input EMI filter but I didn't leave the space for the snubber.
Finally it is a very good idea that leave the door open.
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