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

研究成果: Conference contribution

3 引文 斯高帕斯(Scopus)

摘要

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.

原文English
主出版物標題2010 International Symposium on Next-Generation Electronics, ISNE 2010 - Conference Program
頁面13-16
頁數4
DOIs
出版狀態Published - 2010 十二月 1
事件2010 International Symposium on Next-Generation Electronics, ISNE 2010 - Kaohsiung, Taiwan
持續時間: 2010 十一月 182010 十一月 19

出版系列

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

Other

Other2010 International Symposium on Next-Generation Electronics, ISNE 2010
國家Taiwan
城市Kaohsiung
期間10-11-1810-11-19

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering

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