A Simplified Constant Current LED Driver with High Matching Precision
A high matching precision method by resistance ratio to realize current mirror and auto zero technology with switch capacitor to reduce the influence of offset voltage is presented.The proposed design does not utilize traditional current mirror and greatly simplifies the common current ratio circuit by multipliers of MOSFET in proportion.The output current matching precision of each output channel is nearly unaffected by the offset of each Operation Amplifier.The experiment results indicate that the method of multi output LED driver provides far great matching precision; it also has a simple design and has a smaller die size in layout.
Current Mirror LED Driver Current match Resistance Ratio
Yu D J Liu Y
School of Microelectronics and Solid State Electronics,University of Science and Technology of China,Chengdu 610054,China
国内会议
成都
英文
66-70
2013-11-15（万方平台首次上网日期，不代表论文的发表时间）