I'm working on a product that requires an led to output currents varrying from 0mA to 350mA and as many possible levels in between (~1000 would be sufficient I suppose). I CANT output a PWM signal to the led because that would defeat the purpose of my product (This is important).
Does anyone know an integrated circuit that allows this level of current control? Otherwise does anyone have an idea of how I could build a circuit to do this? I have thought about Voltage Controlled Current Sources built with op amps, but I have no experience with these or know of any specific circuits.
It also must be able to run off of batteries.
The LED is going to be moving at an extremely fast rate through the air and has to maintain a solid beam of light rather than a blink. thats why i can't use PWM.