I'm designing a voltage to current converter that should have the following specifications:
Vin = 0 V to 10 V
Iout = -15 mA to 15 mA
load: inductive load: R= 206 Ohm, L=2.2H
I searched for answered questions on this forum and I didn't find a symmetric converter.
The first design that I made (using LTspice), that I was expecting to work properly (as you can see below - and file voltageCurrent_1.asc attached) is limited to only |5 mA|. Can you explain me why?
In this design the output, during the transient, oscillates a lot, how could I stabilize it?
The second design has an addictional resistor which "extends" the current to |10 mA| (as you can see below - and file voltageCurrent_2.asc attached), but I can't increase it more. How should I do?
In this case the output is much more damped
One more: I couldn't find the output current in the op amp DS, how could I be sure that the part that I selected works properly? and how should I select the part without this info from the DS?
Attached the circuit filesFile: