An Efficient Parallel Resonant Converter for LED Lighting

摘要

An LED driver is presented using parallel loaded resonant converter. Output voltage of this converter added to a dc source to feed the lamp load. One voltage source supplies majority of lamp power directly and other supplies a small power through parallel resonant converter for regulation. This driver features zero voltage switching (ZVS), high efficiency and simple control. Illumination control is incorporated using PWM dimming. A 26 W prototype has been developed to confirm its validity.