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

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering

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