Volume : III, Issue : XII, December - 2014

Double Buck Boost Converter Driver For Power Led Lamps

B. Venkatesh Reddy, J. Santhosh Kumar

Abstract :

High ightness LEDs are an inexpensive, robust, and green replacement for halogen light bulbs. LEDs offer a much longer lifetime and eliminate the safety hazards of the inert gas, the expense of the UV filter encasement, and the handling sensitivity of halogens. Since halogen bulbs typically are driven with 12 or 24 V due to their excellent efficacy at those voltages, buildings have been wired with 12- and 24-V ac transformers for halogen lighting. Therefore, replacing existing halogen lighting with LEDs requires only an LED driver to convert the 12- or 24-V ac to an appropriate dc voltage. A suitable circuit is a switch mode regulator LED driver designed for ac lighting that requires a high power factor (PF). The ideal load, with 100% power factor, is a pure resistor. In contrast to the resistive load, an LED driver with constant (dc) LED current, as is often used to power LEDs from a dc source, has a very poor power factor when used with an ac source. In this paper, an integrated double buck-boost (IDBB) converter is proposed as a high-power-factor offline power supply for power-LED lamps. The IDBB converter features just one controlled switch and two inductors and is able to supply a solid-state lamp from the mains, providing high power factor and good efficiency

Keywords :

Article: Download PDF   DOI : 10.36106/ijsr  

Cite This Article:

B. Venkatesh Reddy,J. Santhosh Kumar Double Buck Boost Converter Driver For Power Led Lamps International Journal of Scientific Research, Vol : 3, Issue : 12 December 2014

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