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A primary side controlled offline Flyback LED driver is an very attractive LED driver solution due to its low component cost and high efficiency. However, as any other single-stage LED driver, it produce significant low frequency ripple current. In this paper, an innovative primary side controlled Flyback LED driver with low frequency ripple cancellation has been proposed. The low frequency ripple...
This paper presents an integrated buck-type dimmable LED driver for high-brightness lighting applications. A lossless synchronous current control is developed to enable the driver to operate at high operation frequencies and achieve high current accuracy over a wide range of input voltages and output LED loads. The driver power efficiency is also benefited from realizing the synchronous rectification...
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