一种低温漂的高精度带隙基准源的设计与分析  

Design and analysis of a low temperature float high precision band-gap reference

作　　者：杨虹[1] 曾莉[1] 向高林[1] 

机构地区：[1]重庆邮电大学光电工程学院,重庆400065

出　　处：《电子元件与材料》2013年第5期45-47,59,共4页Electronic Components And Materials

基　　金：重庆市教委科学技术研究基金资助项目(No.KJ100512);重庆市自然科学基金资助项目(No.CSTC 2010BB2412);重庆市大学生创新创业训练计划资助项目(No.201210617010);重庆邮电大学大学生科研训练计划资助项目

摘　　要：根据基准源产生的基本原理、特性,综合温度补偿及电阻分压技术,设计出了一款能广泛应用于开关电源PWM控制器、隔离反馈发生器等的带隙基准源。该基准源电路基于6μm标准BJT工艺实现,仿真结果表明,当电源电压为15 V时,当温度为25℃时,VREF输出为5 V;当12 V≤VCC≤25 V时,线性调整率为0.16 mV;当1 mA≤I0≤20 mA时,负载调整率为1.61 mV左右;温度稳定性良好,大约为0.05 mV/℃。According to the fundamentals and characteristics of band gap circuits, and integrated temperature compensation and resistive subdivision techniques, a band-gap reference was designed which could be applied to the switching power supply PWM controller and isolation feedback generator. The circuit of the reference was based on 6 μm BJT process. The simulation result shows when the power supply voltage is 15 V, 25 ℃, the output of VREF is 5 V. When 12 V≤ VCC≤25 V, the line regulation of the circuit is 0.16 mV. When 1 mA≤10≤20 mA; the load regulation of the circuit is about 1.61 mV. The temperature stability is good with the temperature coefficient of about 0.05 mV/ ℃.

关 键 词：带隙基准源 开关电源控制芯片 线性调整率 温度稳定性 仿真 负载调整率 

分 类 号：TM277[一般工业技术—材料科学与工程]