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This paper presents a novel constant current LED controller with primary-side feedback control method for flyback topology. The method is proposed based on sampling input peak current and secondary-side electric information detected by an extra auxiliary winding. Eliminating opto-isolator, the controller can still regulated the output current precisely by designing special sample circuit and compensating...
In order to make the LED driver to meet the requirements of high efficiency, reliability and low cost, this paper presents a single-stage flyback converter. The operation principles of this converter and the parameters of the major components are fully analyzed. The simulation was conducted under different input conditions by the Saber software. The results show that high power factor and high conversion...
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