Title :
LED driver circuit with inherent PFC
Author :
Aguilar, D. ; Henze, C.P.
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Minnesota, Minneapolis, MN, USA
Abstract :
A buck-boost topology operating in discontinuous conduction mode (DCM) is used as an off line LED driver for lighting applications. Operating from a full wave rectified ac-voltage with minimum input capacitance, with a constant switching frequency and constant on-time, the utility current has near unity power factor. This LED driver is suitable for cost sensitive applications because this circuit has a minimal parts count and a very simple control circuit. Disadvantages are that the LED drive current is modulated at twice the utility frequency and DCM operation increases component stress levels.
Keywords :
driver circuits; light emitting diodes; power convertors; power factor correction; DCM operation; LED driver circuit; buck-boost topology; control circuit; cost sensitive applications; discontinuous conduction mode; full wave rectified AC-voltage; lighting applications; minimum input capacitance; switching frequency; unity power factor; utility current; Capacitance; Circuit topology; Costs; Driver circuits; Drives; LED lamps; Light emitting diodes; Reactive power; Stress; Switching frequency;
Conference_Titel :
Applied Power Electronics Conference and Exposition (APEC), 2010 Twenty-Fifth Annual IEEE
Conference_Location :
Palm Springs, CA
Print_ISBN :
978-1-4244-4782-4
Electronic_ISBN :
1048-2334
DOI :
10.1109/APEC.2010.5433607
