带功率因数校正的单级离线SEPIC转换器驱动高亮度led

2009 Twenty-Fourth Annual IEEE Applied Power Electronics Conference and Exposition Pub Date : 2009-03-21 DOI:10.1109/APEC.2009.4802711

Z. Ye, F. Greenfeld, Zhixiang Liang

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引用次数: 67

摘要

提出了一种具有LED电流可调和输入功率因数校正功能的交错SEPIC转换器，作为高亮度白光LED的高性能驱动器。该变换器采用电压型PWM控制，以断续导通模式运行，使电感电流随整流输入电压变化。重点介绍了功率级和控制回路的关键设计约束和方程。开发了一个输入110V，输出60V, 700mA的实用评估板来验证所提出的设计。所提出的转换器可用于驱动工业或商业照明应用的大量高亮度led。

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Single-Stage Offline SEPIC Converter with Power Factor Correction to Drive High Brightness LEDs

An interleaved SEPIC converter with LED current dimmable and input power factor correction is proposed as a high performance driver for the high brightness white LEDs. The converter is controlled with voltage mode PWM and run in discontinuous conduction mode so that the inductor current follows the rectified input voltage. The critical design constraints and equations for both the power stage and control loop are highlighted and detailed. A practical evaluation board with 110V input and 60V, 700mA output is developed to verify the proposed design. The proposed converter can be used to drive a wide number of high brightness LEDs for industrial or commercial lighting applications.

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2009 Twenty-Fourth Annual IEEE Applied Power Electronics Conference and Exposition

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