I have design small supply for give power for switching controller ( SG3225, push pull transistor and transformer gatedrive) Half-bridge switching power supply converter for Audio amplifier.
By used LNK306 and used switching inductor 1mH (600mA Isat and coat with conformal coating chemecal ) but I have some small noise (air noise in inductor).
And this made trouble for me to much. becuase, this noise have amplifier to speaker.
I try to fix it with many method (vanish Inductor and glue together with PCB, etc. ) but it still have audio noise.
Then, I have to keep it wrong value of inductor (I need to increase it to 2.2mH) 220uH and put it in my power supply board.
I not have any audio noise out.
So, can I used this value 220uH of inductor for LNK306 in this design? *in this time I didn't install with amplifier circuit.