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Novel Two-switch Electrolytic Capacitor-less LED Driver
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Jingwei ZHANG, Guoqing LIN
Journal of Power Supply | 2024, 22(4) : 260 - 269
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Journal of Power Supply | 2024, 22(4): 260-269
Lighting Power Supply
Novel Two-switch Electrolytic Capacitor-less LED Driver
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Jingwei ZHANG, Guoqing LIN
Affiliations
  • College of Electrical Engineering and Automation Fuzhou University Fuzhou 350108 China
Published: 2024-07-30 doi: 10.13234/j.issn.2095-2805.2024.4.260
Outline
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The light-emitting diode (LED) driver usually needs a large electrolytic capacitor to reduce its low-frequency current ripple. Therefore, the short life of the electrolytic capacitor is an important factor restricting the life of LED driver, and eliminating the electrolytic capacitor is a key to the long-life LED driver. Under this background, a two-switch electrolytic capacitor-less LED drive circuit topology based on flyback converter is proposed. The auxiliary power balance circuit and flyback converter are integrated, and a balance between the instantaneous input power and output power is realized through two switches. The electrolytic capacitor is eliminated, the low-frequency ripple of output current is suppressed, and a high power factor is realized. The working principle of this topology is analyzed in detail, and a control strategy for its circuit topology is put forward. Finally, a 30 W prototype was built, and experimental results verified the feasibility of the proposed topology.

Light-emitting diode (LED) driver  /  electrolytic capacitor-less  /  power factor correction  /  low-frequency ripple suppression
Jingwei ZHANG, Guoqing LIN. Novel Two-switch Electrolytic Capacitor-less LED Driver[J]. Journal of Power Supply, 2024 , 22 (4) : 260 -269 . DOI: 10.13234/j.issn.2095-2805.2024.4.260
  • Fuzhou University Jinjiang Science and Education Park(2019-JJFDKY-37)
Year 2024 volume 22 Issue 4
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310
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Article Info
doi: 10.13234/j.issn.2095-2805.2024.4.260
  • Receive Date:2022-01-13
  • Online Date:2025-07-21
  • Published:2024-07-30
Article Data
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History
  • Received:2022-01-13
  • Revised:2022-04-01
  • Accepted:2022-04-13
Funding
Fuzhou University Jinjiang Science and Education Park(2019-JJFDKY-37)
Affiliations
    College of Electrical Engineering and Automation Fuzhou University Fuzhou 350108 China
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表12种不同金属材料的力学参数

Family
属数
Number of
genus
种数
Number of
species
占总种数比例
Percentage of
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Genus
种数
Number of
species
占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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