A new non-isolated high power factor white LED driver for street light applications

摘要

In this paper an integrated driver with only one switch and one capacitor for driving high brightness white light emitting diodes (HB-WLEDs) in street light applications has been proposed. The proposed driver in addition to providing high power factor at the input, features considerable more lifetime and compact size due to eliminating one capacitor compared with conventional circuit topologies for driving HB-WLEDs. Proper operation of the driver was certified through simulation process and laboratory test. In simulation process a commercially available LED with adopted linear model was used. Furthermore a laboratory prototype showed high input power factor in addition to proper operation of the driver.