Title :
A current reference based on bandgap technology with wide input voltage range by using 0.18µm BCD process
Author :
Kan Liu ; Yadan Shen ; Yidie Ye ; Lenian He
Author_Institution :
Coll. of Electr. Eng., Zhejiang Univ., Hangzhou, China
Abstract :
A current reference with 8~25V input voltage range has been designed by using CSMC´s 0.18μm BCD process. Based on the bandgap technology, the temperature coefficient of the current reference was obtained to be 105.9~110.7 ppm/°C over the temperature range of -40~125°C when the input voltage was 8~25V. The total quiescent current of the current reference is 9.02μA and 22.55μA when the input voltage is 8V and 25V, respectively. Moreover, the PSR (power supply rejection) at low frequency is -56.2dB ~ -28.1dB, when the input voltage is between 8V and 25V. This current reference has been successfully applied in a white LED driver chip.
Keywords :
driver circuits; light emitting diodes; power supply circuits; reference circuits; CSMC BCD process; PSR; bandgap technology; current 22.55 muA; current 9.02 muA; current reference; gain -56.2 dB to -28.1 dB; power supply rejection; size 0.18 mum; temperature -40 degC to 125 degC; temperature coefficient; total quiescent current; voltage 8 V to 25 V; white LED driver chip; wide input voltage range; Analog integrated circuits; Educational institutions; Light emitting diodes; Photonic band gap; Power supplies; Temperature distribution; Very large scale integration; Bandgap technology; Current reference; Wide input range;
Conference_Titel :
Electron Devices and Solid State Circuit (EDSSC), 2012 IEEE International Conference on
Conference_Location :
Bangkok
Print_ISBN :
978-1-4673-5694-7
DOI :
10.1109/EDSSC.2012.6482889
