Research and Design of a white LED driver chip applied in backlight
A white LED driver chip applied in backlight is proposed, which is based on pulse width modulator. The design of modules such as current reference, oscillator and dynamic slope compensation are discussed in detail. The simulation results, based on CSMC 0.5um BCD technology, show that the input voltage is in the range of 3.3~5.5V, the output voltage is up to 20V when the output current is between 15～60mA, which can drive 2~6 white LEDs in series with the conversion efficiency 88％. Characteristics such as the overall circuit loop stability, dynamic characteristics, load capacity are well satisfied the design requirements.
LED current control mode pulse width modulator dc-dc Converter
Yi-zhong Yang Guang-jun Xie Hui-fang Xu Sheng-tao Wei
School of Electronic Science and Applied Physics, Hefei University of Technology, Hefei 230009, China
国际会议
上海
英文
506-508
2010-11-01（万方平台首次上网日期，不代表论文的发表时间）