Efficient Interleaved Buck Converter Driver for LED Applications

Abstract

—This paper proposes the Interleaved Buck Converter (IBC) for improving the performance of LED. The converter itself will be acting as a driver for the LED. Interleaved buck converter (IBC) operates with continuous input current, extremely low output current ripple with small inductance and high frequency of operation (40 kHz), avoiding audible noises. IBC is introduced to diminish the disadvantages of conventional Buck converter as LED driver. Also, the proposed converter can provide current sharing between two interleaved modules without using additional current-sharing control method. All of these benefits are obtained without any additional stress on the circuit components. A prototype converter with 20 V input and 6.5V–5A output is implemented to verify the theoretical analysis. Operational principles are based on analytical approach, MATLAB-Simulink and LT spice results are presented in this paper.