I'm working with Buck converters and Boost converters separately.
Can someone tell me the reason why the output ripple voltage (and current) exists in the Output Capacitors and how does the input ripple voltage (and current) occurs in the input capacitors?
I think since the current in the inductor is ramping up and down, this current flows in and out of the output capacitor which is why we get output ripple current in the capacitor. And if its an Electrolytic capacitor, we have its ESR, which gives the Output ripple voltage? Is my understanding correct? If so, could you provide a formula for it which might help in intuitive understanding?
But I am not able to understand how input ripple voltage and current occurs at the input capacitors? Please help with that.
Any proper references or links to the formulas for their calculation of ripple current and voltage and the input and output of the capacitors?