A high efficiency boost white LED driver for portable electronics applications

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

3 Citations (Scopus)

Abstract

Power efficiency is a very important issue for portable electronic devices since it determines the battery life. The backlight module usually accounts for the major part of power dissipation in a portable device. Thus, to extend the operation time of a portable device, a high efficiency backlight module should be employed. White light-emitting diodes (WLEDs) have replaced cold cathode fluorescent lamps as backlight modules in portable electronics in recently years due to their superior power efficiency. This paper presents a high efficiency WLED driver with an integrated boost DC-DC converter that can drive a series of WLEDs using a single lithium-ion battery, which is the most popular power source for portable devices. As unexpected operation conditions can result in the failure of the driver, battery, or inductor, the driver integrates protection circuits for over current, over voltage, and under voltage. The driver was fabricated in the TSMC 0.25-μm 60-V bipolar-CMOS-DMOS process. The over current protection level is set to 2 A. The over voltage protection is set to 50 V, allowing the boost converter to drive 12 WLEDs in series connection. The under voltage protection circuit turns off the converter when it detects an input voltage below 2.5 V to protect the battery.

Original languageEnglish
Title of host publication2010 International Symposium on Next-Generation Electronics, ISNE 2010 - Conference Program
Pages13-16
Number of pages4
DOIs
Publication statusPublished - 2010 Dec 1
Event2010 International Symposium on Next-Generation Electronics, ISNE 2010 - Kaohsiung, Taiwan
Duration: 2010 Nov 182010 Nov 19

Publication series

Name2010 International Symposium on Next-Generation Electronics, ISNE 2010 - Conference Program

Other

Other2010 International Symposium on Next-Generation Electronics, ISNE 2010
Country/TerritoryTaiwan
CityKaohsiung
Period10-11-1810-11-19

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering

Fingerprint

Dive into the research topics of 'A high efficiency boost white LED driver for portable electronics applications'. Together they form a unique fingerprint.

Cite this