Browsing by Author "SRUTHY, V KUMAR"

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    Sepic Based Led Driver
    (2017-08-24T05:01:55Z) ARTHI, M; MEGHA, A.T; POOJA, KUMARI; SRUTHY, V KUMAR
    A novel high-power-factor single-stage single-switch light-emitting diodes (LEDs) driver for street lighting system is proposed in this paper. By integrating the single- ended primary- inductor converter (SEPIC) power factor correction circuit and Class- E resonant dc/dc converter, the proposed converter exhibits extreme simplicity and high reliability, as there is only one active power switch. The LED driver could achieve nearly a unit power factor by operating the SEPIC circuit at discontinuous conduction mode. With careful parameters design of a single Class-E resonant converter, the proposed converter can achieve soft-switching characteristics, which could significantly reduce the switching losses and greatly improve the system efficiency. Operational principle, analytical results, and design considerations at 100 kHz are presented, and a 100-W laboratory prototype is proposed to verify the theoretical analysis, whose efficiency is as high as 91.2% in full-load state under 110 V .