| 吏用TOP250YN离线式开关带单级PFC的75W反激式LED电源设计 |
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| 引用本文： | 杨建法.吏用TOP250YN离线式开关带单级PFC的75W反激式LED电源设计[J].电源技术应用,2010(1):19-23. |
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| 作者姓名： | 杨建法 |
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| 作者单位： | 山东沂光电子股份有限公司,山东临沂276017 |
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| 摘 要： | 为利用单级反激式转换器提供一个高功率因数，功率MOSFET的占空比在单个AC线路周期内必须保持恒定。基于TOP250YN和单级PFC的恒压／恒流75W输出LED驱动电源，在2．08～277VAC输入范围内，平均效率〉85％，功率因数〉0．97，符合IEC61000—3—2中对C类设备规定的谐波电流限制和EN55015B传导EMI限制。
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| 关 键 词： | LED驱动器 TOP250YN 208～277VAC输入 75W输出 反激式 单级PFC |
Design of A 75W Flyback LED Power Supply Using TOP250YN Off-line Switch and With Single Stage PFC |
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| YANG Jianfa.Design of A 75W Flyback LED Power Supply Using TOP250YN Off-line Switch and With Single Stage PFC[J].Power Supply Technologles and Applications,2010(1):19-23. |
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| Authors: | YANG Jianfa |
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| Affiliation: | YANG Jianfa (Shandong Yiguang Electronic Co., Ltd, Linyi 276017, China) |
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| Abstract: | To provide a high power factor with a single-stage flyback converter, the power MOSFET＇s duty cycle must be kept constant over a single AC line cycle. In a constant-voltage and constant-current 75W output LED drive power supply, the average efficiency is 〉85% and power factor is 〉0.97 over 208-277VAC input range. This power supply meets harmonic constant limits as specified in IEC61000-3-2 for Class C and EN55015B conducted EMI limits. |
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| Keywords: | LED Driver TOP250YN 208-277VAC Input 75W Output Flyback Single-stage PFC |
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