Variable Frequency Dimmable Multi-Channel LED Driver System IC Design

• Main Authors: Tsui Yu Chi, 崔玉麒
• Other Authors: LIN,JIA-CHUAN
• Format: Others
• Language: zh-TW
• Published: 2014
• Online Access: http://ndltd.ncl.edu.tw/handle/84427500612742637432

碩士 === 國立臺北大學 === 電機工程學系 === 102 === This paper presents a variable frequency dimmable multi-channel LED Driver with 12-channels, each channel supplying a stable current of 30mA. This circuit design can be used in indoor plant cultivation for dimming and illumination purposes, simulation of sunlight source and optical inspection system. Operating at a frequency of 133 kHz to 233 kHz using PWM control, this chip is fabricated and simulated by Taiwan Semiconductor Manufacturing Company using the 0.35um 2P4M CMOS 5V process and the chip size is 0.76mm2. External inputs, as well as a multiplexer control with a fixed external input voltage, Use a multi-switch sawtooth generator can be used to control the brightness.