Can you recommend a circuit that might work here? If I lower the string voltage (the 24v rail), the circuit works
The purpose of this circuit is to "scale" the output. This schematic is simplified; these resistors are sensed by an LED driver to regulate output current.
The goal is to change the total sense resistance, so that the driver can maintain current regulation when the output load requires a very low setting, so I need to scale the resistor for HIGH and LOW settings.