An Improved Non-isolated LED Converter with Power Factor Correction and Average Current Mode Control

• 作者: Changqian Zhang Hongjian Li Renbo Xu Yongzhi Li
• 来源期刊: 电路与系统(英文)
• 学科: 医学
• 关键词: High POWER LED POWER Factor CORRECTION AVERAGE Current Mode Control
• 年，卷（期）: dlyxtyw_2011,（3）
• 页码范围: 242-248
• 页数: 7页
• 分类号: R73

摘要

A new type of high power LED drivers is proposed by adopting an improved two-stages non-isolated configuration. In order to improve power factor and achieve accurate average current control under universal input voltages ranging from 100 Vrms to 240 Vrms, the power factor correction and average current mode control methods operating in continuous current conduction mode are designed and implemented. With the LUMILEDS emitter type LEDs, a laboratory prototype is built and measured. And from the measured results, it could be concluded that the proposed driver has many better performances such as high power factor, low current harmonic, accurate average current control and switch protection.