Sepic Based Led Driver
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Date
2017-08-24T05:01:55Z
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Abstract
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 .
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Keywords
1NH13EE710, 1NH13EE723, 1NH13EE730, 1NH13EE749