LED Lamp Constant Current Source Circuit, Principle and Maintenance, Application of BP3166

Household Appliances # Electronic Circuits # Life Skills # Information Engineering # Computer Science
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[@夏穗興]

講解非常詳細，贊，

[@lww3988]

很棒的講解！

[@steveliu9885]

很清楚的解答！

[@sawloon2085]

正常驱动器输出电压是90多伏，但是现在变成50多伏而造成led灯无法工作。请问我需要检查哪个电子零件？谢谢！

[@joeyeh2802]

解說的真詳細！
我有一12顆貼片LED燈泡，每顆經LED測試儀測過，都會亮且耐壓值是7.8v。恒流板接上110v交流電再通過MB10F整流後測得空載直流電壓為161.6v，可是不知為何再通過濾波、電阻、芯片…等最終接到12顆LED燈盤的正負極時，不見燈亮！我立即測燈盤的輸入二極發現才只有20v ?! 怎會這樣？
想請問這是那個元件出了問題？要怎樣找出？

[@leeming4290]

👍👍👍