Single-Stage Single-Switch Led Driver with Pi-Controller Based Class-E Converter

A one stage light emitting diode (LED) driver with PI controller based class-E converter is investigated in this manuscript. In this proposed approach a single switch is enough to supply controllable DC source to the LED. Voltage regulation is achieved by employing buck/boost chopper, suppressed harmonic content and enhance power factor also. Class E converter topology is utilized to step down voltages and currents to desired values of LED ratings. A simple discrete zigler-nichlos (Z-N method) PI tuning method is considered to regulate the class-E converter. Obtained desired closed loop response of the system with this proposed technique over the conventional two stages or two switch based LED driver. In this proposed method less number of power converters are used so switching losses are less and more economic. For evaluation of performance of LED driver MATLAB software package is utilized.