A Design of Low Temperature Dependence Voltage Reference Circuit for PWM Controller
Zhi Chao Zhao, Tiefeng Wu, Jing Li, Li Min Li, Qie Pan, Jiang Chang · Applied Mechanics and Materials · 2013
In order to provide steady voltage for PWM controller, a design of bipolar voltage reference circuit with high performance is presented. The circuit based on the compensation principle between Zener diode and B-E junction of triode is used in PWM controller and can bring out multi-way steady voltages, moreover, there is a high power supply rejection ratio (PSRR) and low temperature dependence. The results of simulation and test in Candence with bipolar process of HuaYue SB45 show that the temperature coefficient is about 1.2ppm/°C in the temperature range -55~125°C. The line regulation is about 0.4mV/V in 8~30V and the PSRR is 77.54dB. The design of circuit can satisfy the requirements of PWM controller.