Abstract: A high-power LED driver circuit is investigated based on Boost principle and active power factor correction (APFC) technology.  By using average current control method to control the circuit with a double closed loop control system composed of one current loop and one voltage loop,power factor correction and reducing the input total harmonic distortion through input current tracking input voltage is realized. Simulation results show that this circuit is feasible for a high-power LED driver by PSIM software.

Key words: APFC, Led drive circuit, Double closed loop control system