Study of the Asymmetrical Half-Bridge Flyback Converter as an Effective Line-Fed Solid-State Lamp Driver | IEEE Journals & Magazine | IEEE Xplore

Study of the Asymmetrical Half-Bridge Flyback Converter as an Effective Line-Fed Solid-State Lamp Driver


Abstract:

This paper illustrates the design and an experimental test of a line-fed solid-state lamp driver based on the asymmetrical half-bridge flyback converter. Its favorable ch...Show More

Abstract:

This paper illustrates the design and an experimental test of a line-fed solid-state lamp driver based on the asymmetrical half-bridge flyback converter. Its favorable characteristics, in terms of soft-switching range and circuit complexity, allow the converter to operate at variable switching frequency in the range of 300–450 kHz, supplying 6 W to the load with good efficiency. The considered lamp is made up of five series-connected high-power light-emitting diodes (Cree XR-E) and is supplied with 350-mA closed-loop-regulated constant current. While presenting similar complexity and overall efficiency with respect to a conventional driver, due to an original feedforward control technique that allows shrinking the input filter capacitor, the proposed circuit allows a significant volume reduction and consequent power density improvement.
Published in: IEEE Transactions on Industrial Electronics ( Volume: 61, Issue: 12, December 2014)
Page(s): 6730 - 6738
Date of Publication: 28 March 2014

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