I'm designing a power supply filter based on inductor - capacitor topology, as shown below.
However, when the load is suddenly disconnected, a high current starts flowing through the capacitor, as the inductor tries to keep the current constant. What are the ways to prevent this? I'm thinking about adding a short circuit protection across the capacitor.
Suggested solution: flyback diode across the inductor.
It would be forward biased during periods marked in red below - the current then is not flowing through the diodes.
The current won't flow through any diode - when input voltage is low - say 0, then the inductor is maintaining the current, which flows through the load, capacitor and diode itself.
I performed a simulation in Falstad, the diode conducts high current.
And in LTspice, which shows high current.