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

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

1 Citation (Scopus)

Abstract

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.
LanguageEnglish
Title of host publication43rd IEEE European Solid State Circuits Conference ESSCIRC 2017, 11-14 September 2017, Leuven, Belgium
Place of PublicationPiscataway
PublisherInstitute of Electrical and Electronics Engineers
Pages344-347
Number of pages4
ISBN (Electronic)978-1-5090-5025-3
ISBN (Print)978-1-5090-5026-0
DOIs
StatePublished - 2017
Event47th European Solid-State Device Research Conference (ESSDERC 2017) & 43rd European Solid-State Circuits Conference (ESSCIRC 2017), 11-14 September 2017, Leuven, Belgium - Leuven, Belgium
Duration: 11 Sep 201714 Sep 2017
http://www.esscirc-essderc2017.org/

Conference

Conference47th European Solid-State Device Research Conference (ESSDERC 2017) & 43rd European Solid-State Circuits Conference (ESSCIRC 2017), 11-14 September 2017, Leuven, Belgium
Abbreviated titleESSDERC/ESSCIRC
CountryBelgium
CityLeuven
Period11/09/1714/09/17
Internet address

Fingerprint

Light emitting diodes
Capacitors
Surface mount technology
Polychlorinated biphenyls
Switches
Electric potential
Air
Costs

Cite this

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 (pp. 344-347). Piscataway: Institute of Electrical and Electronics Engineers. DOI: 10.1109/ESSCIRC.2017.8094596
Castellanos Rodriguez, J.C. ; Turhan, M. ; Hendrix, M.A.M. ; van Roermund, A.H.M. ; Cantatore, E./ A 92.2% peak-efficiency self-resonant hybrid switched-capacitor LED driver in 0.18μm CMOS. 43rd IEEE European Solid State Circuits Conference ESSCIRC 2017, 11-14 September 2017, Leuven, Belgium . Piscataway : Institute of Electrical and Electronics Engineers, 2017. pp. 344-347
@inproceedings{c6369fb39a3447178c80a0dd43cbfb3f,
title = "A 92.2{\%} peak-efficiency self-resonant hybrid switched-capacitor LED driver in 0.18μm CMOS",
abstract = "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.",
author = "{Castellanos Rodriguez}, J.C. and M. Turhan and M.A.M. Hendrix and {van Roermund}, A.H.M. and E. Cantatore",
year = "2017",
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language = "English",
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Castellanos Rodriguez, JC, Turhan, M, Hendrix, MAM, van Roermund, AHM & 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 . Institute of Electrical and Electronics Engineers, Piscataway, pp. 344-347, 47th European Solid-State Device Research Conference (ESSDERC 2017) & 43rd European Solid-State Circuits Conference (ESSCIRC 2017), 11-14 September 2017, Leuven, Belgium, Leuven, Belgium, 11/09/17. DOI: 10.1109/ESSCIRC.2017.8094596

A 92.2% peak-efficiency self-resonant hybrid switched-capacitor LED driver in 0.18μm CMOS. / Castellanos Rodriguez, J.C.; Turhan, M.; Hendrix, M.A.M.; van Roermund, A.H.M.; Cantatore, E.

43rd IEEE European Solid State Circuits Conference ESSCIRC 2017, 11-14 September 2017, Leuven, Belgium . Piscataway : Institute of Electrical and Electronics Engineers, 2017. p. 344-347.

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

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T1 - A 92.2% peak-efficiency self-resonant hybrid switched-capacitor LED driver in 0.18μm CMOS

AU - Castellanos Rodriguez,J.C.

AU - Turhan,M.

AU - Hendrix,M.A.M.

AU - van Roermund,A.H.M.

AU - Cantatore,E.

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Y1 - 2017

N2 - 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.

AB - 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.

U2 - 10.1109/ESSCIRC.2017.8094596

DO - 10.1109/ESSCIRC.2017.8094596

M3 - Conference contribution

SN - 978-1-5090-5026-0

SP - 344

EP - 347

BT - 43rd IEEE European Solid State Circuits Conference ESSCIRC 2017, 11-14 September 2017, Leuven, Belgium

PB - Institute of Electrical and Electronics Engineers

CY - Piscataway

ER -

Castellanos Rodriguez JC, Turhan M, Hendrix MAM, van Roermund AHM, Cantatore E. 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 . Piscataway: Institute of Electrical and Electronics Engineers. 2017. p. 344-347. Available from, DOI: 10.1109/ESSCIRC.2017.8094596