10 W DC-DC converter based LED driver circuit design

Abstract

Considering the total amount of energy consumed in the world, energy used in lighting is of utmost importance. For this reason, systems used in lighting should be energy efficient, and mıre efficient lighting elements should be preferred. LED, as a solid-state lighting system, is more energy efficient than the lighting systems with conventional lighting elements. Some of the LEDs used in solid-state lighting systems are named as standard 5mm LEDs and power LEDs. Because power LEDs have more light efficiency than standard 5 mm LEDs, they are produced as an alternative to conventional light sources. Power LEDs draw much more current than standard 5 mm LEDs. LEDs need LED drivers that provide them with constant current to run efficiently, and have a long life. The present research studies 10 W DC-DC converter based current limited LED driver circuits. Simulations were created for these LED driver circuits, and they are analysed through their simulations. Efficiency, input current, total circuit loss, output current and power values are measured. In this context, output current and efficiency values of the driver circuits are analysed in terms of energy efficiency, and optimised in accordance with energy efficiency.