电子元件与材料2017，Vol.36Issue(8)：75-79,5.DOI:10.14106/j.cnki.1001-2028.2017.08.013
一种高精度阈值可调过温保护电路的设计
Design of a high precision threshold adjustable over-temperature protection circuit
摘要
Abstract
A high precision threshold adjustable over-temperature protection circuit was presented.Temperature detection was achieved by comparing a independent voltage of temperature with a negative temperature coefficient voltage.By bandgap reference voltage division,a high accuracy hysteresis comparator with adjustable upper and lower threshold voltage was obtained.Based on 0.18 μm BCD process model,the circuit was simulated by using Hspice software.Simulation results show that,the output of over-temperature protection circuit is high level when temperature is higher than 150.5℃,then the circuit is shut down;it is restarted again when temperature is lower than 130.5 ℃,and the range of hysteresis temperature is 20 ℃.In the source voltage range of 3-5.5 V,the maximum temperature drift of over-temperature voltage threshold and hysteresis temperature is less than 0.02 ℃.关键词
高精度/阈值可调/过温保护/负温度系数/基准/BCD工艺Key words
high precision/adjustable threshold/over-temperature protection/negative temperature coefficient/bandgap reference/BCD process分类
信息技术与安全科学引用本文复制引用
张瓷平,冯全源..一种高精度阈值可调过温保护电路的设计[J].电子元件与材料,2017,36(8):75-79,5.基金项目
国家自然科学基金重点项目资助(No.61531016) （No.61531016）
四川省科技支撑计划重点项目资助(No.2016GZ0059 （）
No.2017GZ0110) （）
