A high efficiency boost white LED driver with an integrated Schottky diode

Yuan Ta Hsieh, Bin Da Liu, Jian Fu Wu, Chiao Li Fang, Hann Huei Tsai, Ying Zong Juang

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

Size and battery life are important issues for portable devices. White light-emitting diodes (WLEDs) have thus replaced cold cathode fluorescent lamps as backlight sources. Since WLEDs are small and highly efficient, a good WLED backlight driver design can reduce the size of portable devices and extend their operation time. This paper proposes a high efficiency boost WLED driver with an integrated Schottky diode. The DC-DC converter structure allows high efficiency and the on-chip compensator and Schottky diode reduce the board area. The driver also enhances the substrate noise immunity. The simulation results show that the substrate noise was reduced from ±1.8 to ±0.8 V. The driver was fabricated in the TSMC 0.25-μm bipolar-CMOS-DMOS process. For a load of six VLEDs at an input voltage of 4.3 V, the power efficiency was 91.6%.

Original languageEnglish
Title of host publicationProceedings of the 2010 Asia Pacific Conference on Circuit and System, APCCAS 2010
Pages660-663
Number of pages4
DOIs
Publication statusPublished - 2010 Dec 1
Event2010 Asia Pacific Conference on Circuit and System, APCCAS 2010 - Kuala Lumpur, Malaysia
Duration: 2010 Dec 62010 Dec 9

Publication series

NameIEEE Asia-Pacific Conference on Circuits and Systems, Proceedings, APCCAS

Other

Other2010 Asia Pacific Conference on Circuit and System, APCCAS 2010
CountryMalaysia
CityKuala Lumpur
Period10-12-0610-12-09

Fingerprint

Light emitting diodes
Diodes
Fluorescent lamps
DC-DC converters
Substrates
Printed circuit boards
Light sources
Cathodes
Electric potential

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering

Cite this

Hsieh, Y. T., Liu, B. D., Wu, J. F., Fang, C. L., Tsai, H. H., & Juang, Y. Z. (2010). A high efficiency boost white LED driver with an integrated Schottky diode. In Proceedings of the 2010 Asia Pacific Conference on Circuit and System, APCCAS 2010 (pp. 660-663). [5775089] (IEEE Asia-Pacific Conference on Circuits and Systems, Proceedings, APCCAS). https://doi.org/10.1109/APCCAS.2010.5775089
Hsieh, Yuan Ta ; Liu, Bin Da ; Wu, Jian Fu ; Fang, Chiao Li ; Tsai, Hann Huei ; Juang, Ying Zong. / A high efficiency boost white LED driver with an integrated Schottky diode. Proceedings of the 2010 Asia Pacific Conference on Circuit and System, APCCAS 2010. 2010. pp. 660-663 (IEEE Asia-Pacific Conference on Circuits and Systems, Proceedings, APCCAS).
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abstract = "Size and battery life are important issues for portable devices. White light-emitting diodes (WLEDs) have thus replaced cold cathode fluorescent lamps as backlight sources. Since WLEDs are small and highly efficient, a good WLED backlight driver design can reduce the size of portable devices and extend their operation time. This paper proposes a high efficiency boost WLED driver with an integrated Schottky diode. The DC-DC converter structure allows high efficiency and the on-chip compensator and Schottky diode reduce the board area. The driver also enhances the substrate noise immunity. The simulation results show that the substrate noise was reduced from ±1.8 to ±0.8 V. The driver was fabricated in the TSMC 0.25-μm bipolar-CMOS-DMOS process. For a load of six VLEDs at an input voltage of 4.3 V, the power efficiency was 91.6{\%}.",
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Hsieh, YT, Liu, BD, Wu, JF, Fang, CL, Tsai, HH & Juang, YZ 2010, A high efficiency boost white LED driver with an integrated Schottky diode. in Proceedings of the 2010 Asia Pacific Conference on Circuit and System, APCCAS 2010., 5775089, IEEE Asia-Pacific Conference on Circuits and Systems, Proceedings, APCCAS, pp. 660-663, 2010 Asia Pacific Conference on Circuit and System, APCCAS 2010, Kuala Lumpur, Malaysia, 10-12-06. https://doi.org/10.1109/APCCAS.2010.5775089

A high efficiency boost white LED driver with an integrated Schottky diode. / Hsieh, Yuan Ta; Liu, Bin Da; Wu, Jian Fu; Fang, Chiao Li; Tsai, Hann Huei; Juang, Ying Zong.

Proceedings of the 2010 Asia Pacific Conference on Circuit and System, APCCAS 2010. 2010. p. 660-663 5775089 (IEEE Asia-Pacific Conference on Circuits and Systems, Proceedings, APCCAS).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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Hsieh YT, Liu BD, Wu JF, Fang CL, Tsai HH, Juang YZ. A high efficiency boost white LED driver with an integrated Schottky diode. In Proceedings of the 2010 Asia Pacific Conference on Circuit and System, APCCAS 2010. 2010. p. 660-663. 5775089. (IEEE Asia-Pacific Conference on Circuits and Systems, Proceedings, APCCAS). https://doi.org/10.1109/APCCAS.2010.5775089