A Flicker-Free Single-Stage Offline LED Driver With High Power Factor

被引:73
作者
Fang, Peng [1 ]
Liu, Yan-Fei [1 ]
Sen, Paresh C. [1 ]
机构
[1] Queens Univ, Dept Elect & Comp Engn, Kingston, ON K7L 3N6, Canada
关键词
Flicker-free light-emitting diode (LED) driving; high power factor; ripple cancellation; single-stage power conversion; ELECTROLYTIC CAPACITOR; OUTPUT CURRENT; VOLTAGE; DESIGN; IMPLEMENTATION; CONVERTER; CIRCUIT; SCHEME;
D O I
10.1109/JESTPE.2015.2436390
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
A conventional offline single-stage light-emitting diode (LED) driver with a high power factor usually produces a significant twice-line-frequency ripple LED current, where the ripple LED current is presented as flickering to human eye. This paper introduces a ripple cancellation method to remove the twice-line-frequency voltage ripple for an offline single-stage LED driver with a power factor correction. Consequently, a dc LED current can be produced to achieve flicker-free LED driving performance. At the same time, the required storage capacitor for the proposed LED driver can be greatly reduced, and the circuit implementation to achieve ripple cancellation is simple. Thus, the overall cost of the proposed LED driver is low. The proposed LED driver also features high efficiency because of its power structure. A 35-W Flyback experimental prototype and a 10-W Buck-Boost experimental prototype have been built to validate the proposed design and demonstrate its optimal performance.
引用
收藏
页码:654 / 665
页数:12
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