A High PSRR Bandgap Reference for LED Driver
A high PSRR bandgap reference with trimming resistive circuits for LED driver is presented.By reducing input offset of the amplifier,adding a PSRR enhancement circuit,presetting the VDD and using resistance trimming technology,the reference circuit achieves a high-precision,low-drift and high-PSRR reference voltage.It has a simple structure,and can work under a wide supply voltage range of 6V to 12V.The reference is implemented in the TSMC 0.25 μm BCD process,and is applied to a AC-DC type constant current driver for LED.Simulation results show that the temperature coefficient of the reference voltage is 6.08 ppm/℃ in the temperature range from-40℃ to 155℃,and the PSRR is 97.9dB.The reference output voltage swing is less than 0.14mV when VDD varies between 6V and 12V.
bandgap reference PSRR resistance trimming LED driver BCD process
Feiquan Wu Honghui Deng Yongsheng Yin
Institute of VLSI Design HeFei University of Technology Hefei,China
国际会议
重庆
英文
742-745
2016-03-20（万方平台首次上网日期，不代表论文的发表时间）