Design of fast stabilized LED driver IC with low overcurrent

Author

Yuan-Ta Hsieh ; Jian-Fu Wu ; Chiao-Li Fang ; Hann-Huei Tsai ; Ying-Zong Juang

Author_Institution

Nat. Appl. Res. Labs., Nat. Chip Implementation Center, Hsinchu, Taiwan

fYear

2013

fDate

22-25 April 2013

Firstpage

550

Lastpage

553

Abstract

Light-emitting diodes (LEDs) are an efficient source of illumination for displays and backlights, providing extended lifespan, wide color gamut, and excellent dimming capability. The use of pulse-width modulation (PWM) for dimming makes LEDs susceptible to overcurrent, which can shorten the lifespan of the devices. This paper proposes a novel technique to suppress overcurrent in LEDs operating in PWM dimming mode. The proposed LED driver IC was designed in accordance with the TSMC 0.25-μm 60-V BCD fabrication process, and experimental as well as simulation results demonstrate the efficacy of the proposed approach.

Keywords

display instrumentation; driver circuits; integrated circuit design; light emitting diodes; overcurrent protection; pulse width modulation; PWM dimming mode; TSMC BCD fabrication process; device lifespan; dimming capability; displays; fast stabilized LED driver IC; illumination source; light-emitting diodes; overcurrent suppression; pulse-width modulation; size 0.25 mum; voltage 60 V; wide color gamut; Integrated circuit modeling; Light emitting diodes; Limiting; Pulse width modulation; Stability analysis; Switches;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Electronics and Drive Systems (PEDS), 2013 IEEE 10th International Conference on

Conference_Location

Kitakyushu

ISSN

2164-5256

Print_ISBN

978-1-4673-1790-0

Electronic_ISBN

2164-5256

Type

conf

DOI

10.1109/PEDS.2013.6527080

Filename

6527080