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For remote sensing purposes, I want to locate an output voltage for feedback close to the load device, which is far from the power supply IC. In this case, the wiring to the FB pin will be long, and a separate LC filter not normally included in a feedback loop is included. How can I deal with this?
Check the actual frequency characteristics (phase, gain margins) of the feedback loop including the LC filter to confirm stability. It will also be necessary to observe the output voltage waveform during load fluctuation of the actual set, to ensure that continuous ringing or other signs of oscillation do not appear in the output voltage.