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This paper proposes a single-stage electroly-ticcapacitors-free ac-to-dc driving circuit for light-emitting-diode (LED). A buck-boost power factor corrector (PFC) is integrated with a flyback converter. In this way, the presented circuit can provide not only high power factor (HPF) and low total harmonic distortion (THD). The electrolytic capacitors can be replaced by multi-layer ceramic capacitors...
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