Feedback Device and Method for Constant Current Driver

A feedback device for a constant current driver, controlling a power supply module in the constant current driver to generate an output voltage, wherein the constant current driver drives an electrical load with an output current, the feedback device comprising:

• a feedback control module, for receiving a load driven voltage related to the electrical load and generating a control voltage accordingly, wherein the load driven voltage is a load voltage or generated from the load voltage;
• and
• a feedback output unit, coupled between the feedback control module and the power supply module, for generating a feedback current via an equivalent resistor of the feedback output unit according to a voltage difference between the control voltage and a feedback voltage of the power supply module;
• wherein the power supply module controls a magnitude of the output voltage according to the feedback current, allowing the constant current driver to drive the electrical load with the output current.