Hi,If you add a 220nF in series with the coil it will be resonant at near 16kHz.
Driving that with a 0-12V, 16kHz square-wave showed a peak inductor current of about 350mA in simulation.
To get more current you could drive the resonant circuit with a push-pull audio bridge circuit such as the TDA2005, which would near double the supply voltage across the load (about 20Vpp with a 12V supply).
That should give a maximum peak current in the resonant circuit (220nF in series with the coil) of over 600mA.
Edit: If you can tolerate some frequency deviation then you could add a series capacitor to form a resonant circuit at about 16kHz and use feedback to form a high current resonant oscillator at this resonant frequency. You can do that with a fairly simple bridge driver circuit, such as below:
The LTspice simulation shows a peak inductor current of a little over 700mA.
Note: R4 needs to be rated for at least 2W.
View attachment 88160
Thanks for your valuable feedback.
If I don't use 0.5ohm resistor (R4), then also, I am getting the same result.
Would you please explain me the advantage of using 0.5 ohm resistor (R4) in the schematic?
Thanks & Regards.