A 92.2% peak-efficiency self-resonant hybrid switched-capacitor LED driver in 0.18μm CMOS

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Samenvatting

This paper presents a LED driver IC based on a self-resonant Hybrid-Switched Capacitor Converter (H-SCC) operating in the MHz range. Capacitors and switches of the LED driver are integrated on-chip in a low-cost 5V 0.18μm bulk CMOS technology. The effective chip area is 7.5mm2. A conventional SMD output capacitor and a 6.4 mm2 150nH SMD air-core inductor are enough to operate the driver in a compact PCB area. Integrated zero-current detection (ZCD) circuitry enables self-resonant operation and Zero-Current Switching independently of the output current, inductor tolerances and/or parasitics, improving the converter efficiency at light loads. A ZCD threshold control enables continuous conduction mode too, to improve efficiency at large currents. The experimental results show a peak efficiency of 92.2% and a maximum power density of 373mW/mm2. The LED driver is able to control a 700mA LED down to 10% of its nominal current and can adjust to LED voltage variations, avoiding the need for LED binning.
Originele taal-2Engels
Titel43rd IEEE European Solid State Circuits Conference ESSCIRC 2017, 11-14 September 2017, Leuven, Belgium
Plaats van productiePiscataway
UitgeverijInstitute of Electrical and Electronics Engineers
Pagina's344-347
Aantal pagina's4
ISBN van elektronische versie978-1-5090-5025-3
ISBN van geprinte versie978-1-5090-5026-0
DOI's
StatusGepubliceerd - 2 nov 2017
Evenement47th European Solid-State Device Research Conference (ESSDERC 2017) & 43rd European Solid-State Circuits Conference (ESSCIRC 2017), 11-14 September 2017, Leuven, Belgium - Leuven, België
Duur: 11 sep 201714 sep 2017
http://www.esscirc-essderc2017.org/

Congres

Congres47th European Solid-State Device Research Conference (ESSDERC 2017) & 43rd European Solid-State Circuits Conference (ESSCIRC 2017), 11-14 September 2017, Leuven, Belgium
Verkorte titelESSDERC/ESSCIRC
LandBelgië
StadLeuven
Periode11/09/1714/09/17
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  • Citeer dit

    Castellanos Rodriguez, J. C., Turhan, M., Hendrix, M. A. M., van Roermund, A. H. M., & Cantatore, E. (2017). A 92.2% peak-efficiency self-resonant hybrid switched-capacitor LED driver in 0.18μm CMOS. In 43rd IEEE European Solid State Circuits Conference ESSCIRC 2017, 11-14 September 2017, Leuven, Belgium (blz. 344-347). [8094596] Institute of Electrical and Electronics Engineers. https://doi.org/10.1109/ESSCIRC.2017.8094596