Recent developments in improving lighting efficiency and cost reduction of LEDs have made
them suitable alternatives to the current lighting systems. In this paper, a novel offline …

AC-DC converters have reached a full-fledged level for improving power quality in terms of
reduced total harmonic distortion at input ac mains, power factor correction (PFC) and …

This paper presents an ac-dc LED driver that consists of two-parallel inverted buck
converters. To buffer the twice-line-frequency energy, one inverted buck converter (also …

Energy-efficient residential lighting such as household light-emitting diode (LED) lamps with
ac input require an ac/dc converter (or driver) with large output capacitance to minimize the …

This paper presents an AC-powered LED driver circuit that can drive multiple strings of LEDs
with uniform brightness. The circuit basically has a two-stage topology in which the first …

Conventional AC-DC driver circuits for Light-Emitting Diode (LED) lamps require large
output capacitance across the LED load to minimize the low frequency current ripple. This …

This paper presents a suppression method of the switching frequency variation for a
hysteretic current mode converter without detecting the inductor current. The renewable …

Light Emitting Diodes (LEDs) are a very promising technology for developing more efficient
lighting. For high-efficiency applications, a switching current regulator is necessary to control …

Lighting a long-life light-emitting diode (LED) lamp with the AC mains requires an AC/DC
rectifying and regulating circuit where the bulky and short-lifetime electrolytic capacitors …

This dissertation presents an ac-dc LED driver that consists of two parallel floating buck
converters. To buffer the twice-line-frequency energy, one floating buck converter conveys …