摘要
为了防止芯片过热,提高芯片可靠性和稳定性,文中提出一种改进的高精度、低功耗,具有迟滞功能,结构简单的过温保护电路.基于JAZZBCD0.5μm工艺库模型,采用Cadence的Spectre仿真器进行模拟验证,结果表明:当温度超过140℃时,电路输出信号发生翻转,控制芯片停止工作;当温度降至118℃时,恢复芯片工作.在电源电压VDD工作范围2.9～6V内,过温保护阈值变化量为0.275℃,迟滞阈值变化量为0.225℃.典型工作状态下,电路的静态电流为46μA.因此该电路适用于各种电源管理芯片.
To avoid overheating and improve the reliability of the chip,an improved Thermal-Shutdown Circuit with high precision and low power consumption is presented in this paper.The proposed circuit features simplicity and excellent performance with high-precision hysteresis.Implemented by JAZZ BCD 0.5μm technology,Spectre simulation shows that the overheating threshold(TH)is 140℃ and the thermal hysteresis threshold(TL)is 118℃.With the power supply range from 2.9 to 6.0V,the variation of TH is 0.275℃ and that of ...
出处
《微电子学与计算机》
CSCD
北大核心
2009年第2期103-106,共4页
Microelectronics & Computer
关键词
过温保护
高精度
迟滞
BCD工艺
thermal shutdown
high precision
hysteresis
BCD technology
