Currently I'm working on switching power supply circuit (buck) step down, and I noticed in most of their application notes from various IC producer that they put an optional LC filter at the end of the circuit before the load. Yes, I'm aware the purpose of that LC filter is to reduce the voltage ripple at the output which is a good thing.
Now the question is how to calculate for the "suitable" value for the L and C ? What other consideration or parameter in determining it ? Switching freq ? Max. current ? Voltage ? etc.. ?
Fyi, I'm no EE, so please be gentle !
Thanks in advance.
Now the question is how to calculate for the "suitable" value for the L and C ? What other consideration or parameter in determining it ? Switching freq ? Max. current ? Voltage ? etc.. ?
Fyi, I'm no EE, so please be gentle !
Thanks in advance.