A Single Stage Double Integrated Buck Converter for LED Lighting Applications

A Double integrated buck converter uses in the fields of solid state lighting. Buck Converter is widely used for step down dc-dc conversion applicaions when there is no isolation requirement. The narrow duty cycle of the buck converter limits its application for high step down applications. The double integrated buck converter overcomes its limitaion. This converter also provides high power factor at the input stage and current regulation at the output stage. A Double integrated buck converter uses for the offline power supply for LED lighting based on the integration of a buck Power Factor Corrector (PFC) and the tapped buck dc/dc converter having high step down capacity and good output current regulation. Due to the high reliability, the simple structure, and the low component count, the proposed topology effectively results to be very suitable for low and medium-power solid-state lighting applications. The simulation of the circuit with 230V input, 30V/500mA output is done using PSIM. Output levels are obtained as per the design values for converter operations.