transcendent
Newbie level 4
I've been reading up about EMI filter design but have one key question I haven't got my head around yet.
A board I'm designing has a DC-DC converter brick, I would like to reduce the EMI radiated by long battery leads which feed its input.
The datasheet just specifies some bypass capacitors at the input and I would like to know:
How does the capacitance stated by the design affect my filter network parameters?
If I, for example, wish to put a parallel damped LC filter in front of the SMPS, does it matter that the input already has ceramic caps+large bulk electrolytics preceeding the filter?
This is probably a pretty stupid question but it is what it is..
A board I'm designing has a DC-DC converter brick, I would like to reduce the EMI radiated by long battery leads which feed its input.
The datasheet just specifies some bypass capacitors at the input and I would like to know:
How does the capacitance stated by the design affect my filter network parameters?
If I, for example, wish to put a parallel damped LC filter in front of the SMPS, does it matter that the input already has ceramic caps+large bulk electrolytics preceeding the filter?
This is probably a pretty stupid question but it is what it is..