电子与封装Issue(6)：19-22,4.
一种高精度过温保护电路的设计
Design of a High Precision Over-temperature Protection Circuit
黄军军 1乔明1
作者信息
- 1. 电子科技大学电子薄膜与集成器件国家重点实验室，成都 610054
- 折叠
摘要
Abstract
An high precision over-temperature protection(OTP)circuit is proposed. The temperature detection is achieved by using the negative temperature characteristic of base-emitter junction voltage. Then comparing the detected voltage and fixed voltage to determine whether over temperature or not. As a high accuracy hysteresis comparator with adjustable upper and lower threshold voltage is used and its threshold voltage is provided by a temperature independent bandgap reference, the precision and the stability are improved. Simulation using Cadence Spectre based on 0.35 μm CMOS process shows that the circuit can shut down the chip at 125 ℃ and open up at 105 ℃, and the hysteretic temperature range is 20 ℃. In the voltage range of 3~5.5 V, the maximum temperature drift of thermal shutdown point and thermal opening point are not more than 0.4 ℃.关键词
过温保护/高精度/滞回比较器Key words
over-temperature protection/high precision/hysteretic comparator分类
信息技术与安全科学引用本文复制引用
黄军军,乔明..一种高精度过温保护电路的设计[J].电子与封装,2015,(6):19-22,4.
