Abstract
In recent times, High-Brightness Light Emitting Diodes (HB-LEDs) are developing rapidly and it is confirmed to be the future development in lighting not only because of their high efficiency and high reliability, however also because of their other exceptional features: chromatic variety, shock and vibration resistance, etc. In this study, a Bridgeless (BL) Isolated Interleaved Zeta Converter is proposed for the purpose of reducing the diode failures or losses, the value of output capacitor gets lessened and the output ripples also gets decreased. Conduction Mode (DCM) which guides to a simplified control circuit. In addition, the converter is composed of bidirectional switches which removes the Diode Bridge Rectifier (DBR) of the converter. The proposed BL isolated interleaved zeta converter operating in Discontinuous Conduction Mode (DCM) is used for controlling the brightness of LED Driver with inherent PFC at ac mains using single voltage sensor. The proposed drive is implemented to achieve a unity power factor at ac mains for a wide range of voltage control and supply voltage fluctuations.
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