High output LED-based profile lighting fixture

Abstract

Recent developments in power light emitting diode (LED) industry have made LEDs suitable for being efficiently used in high intensity lighting fixtures instead of the commonly used high intensity discharge (HID) lamps. A high output LED-based profile-light fixture is presented in this paper. The system consists of a power supply with power factor correction (PFC), a LED-driver and an optical system designed for an overall high efficiency. An interleaved boost converter was chosen as PFC converter. A soft switching phase-shifted full-bridge converter with current doubler provides isolation from the grid and delivers the required voltage to the LED-driver which is a dual interleaved buck converter. Twelve high-power CBT-90 LEDs have been connected in a 4xRGB-configuration to deliver high output of saturated colors without the need for subtractive color filters. More than 6000 lm of fixture light output was measured. © 2011 IEEE.