Title :
A universal LED driver adaptive to multi-topologies based on energy-harvesting system
Author :
Yuhua Fang ; Mingyang Chen ; Fenjie Yuan ; Menglian Zhao ; Yin Zhou ; Xiaobo Wu
Author_Institution :
Inst. of VLSI design, Zhejiang Univ., Hangzhou, China
Abstract :
In this paper, an universal LED driver that adaptive to both buck and boost topologies with high dimming ratio is proposed based on energy harvesting system. The proposed driver can realize either step-up or step-down functions, depending on the connection with power stage. Moreover, PWM dimming is achieved to adjust the brightness to enhance battery life. The proposed controller is designed and fabricated in 1.5μm BCD process and experimental results verify the design under different topologies. The maximum dimming ratio reaches 3000:1 at 100Hz dimming frequency.
Keywords :
brightness; driver circuits; energy harvesting; light emitting diodes; lighting; LED lighting system; PWM dimming; battery life enhancement; boost topologies; brightness adjustment; buck topologies; energy-harvesting system; frequency 100 Hz; high dimming ratio; multitopologies; power stage; step-down functions; step-up functions; universal LED driver; Batteries; Brightness; Energy harvesting; Light emitting diodes; Lighting; Pulse width modulation; Topology; PWM Dimming; adaptive LED driver; energy harvesting;
Conference_Titel :
Industrial Electronics Society, IECON 2013 - 39th Annual Conference of the IEEE
Conference_Location :
Vienna
DOI :
10.1109/IECON.2013.6699162
