Title :
Multi-channel LED Driver with PWM Dimming and Temperature Self-Protection
Author :
Shih-Chang Hsia ; Jyun-Jia Ciou ; Sheng-Yueh Lai
Author_Institution :
Dept. of Electron. Eng., Nat. Yunlin Univ. of Sci. & Technol., Yunlin, Taiwan
Abstract :
In this paper, we propose a novel LED driver chip for multi-channels based on current mirrors. The driver can change the LED brightness with a pulse width modulation (PWM). The chip built a four-order temperature sensor for chip protection. The chip is implemented with TSMC 0.25 UM CMOS HIGH VOLTAGE MIXED SIGNAL BASED. Using 60V power MOS for two channels LED driver, this chip can drive 120W LED string for smart street lighting. The chip core occupied about 1215um x 900um silicon area. The driving efficiency can achieve up to near 90%.
Keywords :
CMOS integrated circuits; brightness; current mirrors; driver circuits; light emitting diodes; mixed analogue-digital integrated circuits; power MOSFET; pulse width modulation; silicon; street lighting; temperature sensors; LED brightness; PWM dimming; Si; TSMC 0.25 UM CMOS high voltage mixed signal; current mirrors; multichannel LED driver chip protection; power 120 W; power MOS; pulse width modulation; size 1215 mum; size 900 mum; smart street lighting; temperature self-protection; temperature sensor; voltage 60 V; Current measurement; Light emitting diodes; Lighting; Mirrors; Pulse width modulation; Temperature sensors; Vehicles; LED driver; PWM; TSMC; temperature;
Conference_Titel :
Intelligent Information Hiding and Multimedia Signal Processing, 2013 Ninth International Conference on
Conference_Location :
Beijing
DOI :
10.1109/IIH-MSP.2013.34
