Hi,
Here is the ltspice simulation: I wonder how to make a true zero starting point for the current driver.
I use single 3.3V to drive a 2V laser load @5A. adjust from 0-5A but it started from 50mA-5A. It's annoying. shall I use chip like 741 with dual rail? or better DAC?
This is the loop I couldn't add nulling resistor nework to inputs. I simulate and find to change R2, the feedback resistor, it is improved but it is not true!
I wonder what caused this 50 mA offset?
Thanks, BCBoy