一种用于智能高边功率IC的负载开路检测电路  

An on-state open load detection circuit for intelligent high side power IC

作　　者：张小琴 蔡小五[1,2] 曾传滨 闫薇薇[1] 赵海涛 刘海南[1,3] 罗家俊[1,2,3] ZHANG Xiao-qin;CAI Xiao-wu;ZENG Chuan-bin;YAN Wei-wei;ZHAO Hai-tao;LIU Hai-nan;LUO Jia-jun(Institute of Microelectronics,Chinese Academy of Sciences,Beijing 100029,China;University of Chinese Academy of Sciences,Beijing 100049,China;Key Laboratory of Silicon Device Technology,Chinese Academy of Sciences,Beijing 100029,China)

机构地区：[1]中国科学院微电子研究所,北京100029 [2]中国科学院大学,北京100049 [3]中国科学院硅器件与技术重点实验室,北京100029

出　　处：《微电子学与计算机》2020年第12期17-21,共5页Microelectronics & Computer

基　　金：国家自然科学基金(61874135)。

摘　　要：基于BCD工艺,设计了一种用于智能高边功率开关的新型开态负载开路检测电路.采用双重判决电路,解决了传统检测方法所带来的额外电压降和小电流检测误差太大的问题,提高了负载开路检测的精度和可靠性,且能实现1 mA^10 mA的低阈值电流检测.Cadence Spectre仿真表明,在开路检测阈值电流为3 mA的情况下,检测精度达98%;在电源电压为24 V的情况下,电荷泵输出电压为27.67 V,充电时间为16.89μs,放电时间为20.3μs,此智能高边功率电路开关时间远远小于英飞凌同类型产品100μs左右的开关时间.A novel on-state open load detection circuit for intelligent high side power switch are presented based on BCD process.By using a double decision circuit,the problem of excessive voltage drop and small current detection error caused by traditional detection method is solved,the accuracy and reliability of open load detection are improved,and low threshold current detection of 1 mA^10 mA can be achieved.The Cadence Spectre simulation shows that with a threshold current of 3 mA,the open load detection accuracy is 98%.At a supply voltage of 24 V,the charge pump output voltage is 27.67 V,the charging time is 16.89μs,and the discharge time is 20.3μs.The switching time of this intelligent high-edge power circuit is far less than that of the same type of infineon products around 100μs.

关 键 词：智能功率集成电路 驱动电路 电平移位 开路检测 

分 类 号：TN402[电子电信—微电子学与固体电子学]