High efficient LED light driver circuit with temperature compensation for SHS

Nowadays semiconductor LED light has become more popular. A driver circuit is needed to drive the LED light in constant current for better luminous efficacy and durability. This work develops a SEPIC based highly efficient LED light Driver circuit with temperature compensation for Solar Home System application where the cost of electrical energy is much higher than grid energy. The high efficiency driver circuit provides constant current to the LED light. Incorporation of temperature compensation provides better efficiency instead of producing less heat thus the requirement of heat dissipation is reduced. A SEPIC based high frequency switching circuit is suggested for maintaining constant current for driving the LEDs. A microcontroller and a temperature sensor ensure the better luminous efficacy rather producing less heat. Simulated result shows that temperature compensated LED driver circuit can increase the driver efficiency up to 99.2%. The circuit operation, flow diagram, simulated and test results are discussed in this paper.