基于分时电压采样的电子继电器控制电路设计  

Design of the Electronic Relay Control Circuit Based on Time-Sharing Voltage Sampling

作　　者：时传飞 梁蓓 赵念[2] 张成发 李沂蒙 李泽宏[2] 方祥 Shi Chuanfei;Liang Bei;Zhao Nian;Zhang Chengfa;Li Yimeng;Li Zehong;Fang Xiang(College of Information Engineering and Big Data,Guizhou University,Guiyang 550025,China;Power Integration Technology Laboratory,University of Electronic Science and Technology of China,Chengdu 610054,China)

机构地区：[1]贵州大学大数据与信息工程学院,贵阳550025 [2]电子科技大学功率集成技术实验室,成都610054

出　　处：《半导体技术》2018年第8期584-590,共7页Semiconductor Technology

摘　　要：针对传统电磁继电器在起动机启动时保护能力弱、灵敏度低、寿命短、体积大等缺点,基于0.35μm CMOS工艺,设计了一种分时电压采样与保护的电子继电器控制集成电路。该电路通过A/D采样模块采集功率MOSFET的漏源电压和过流阈值电压,并利用减法器进行比较,用于判断起动机是否发生堵转,进而控制功率MOSFET的导通/截止,进一步判断起动机的开启或关断。测试结果表明,该电子继电器可在400 A电流下正常启动和在500 A大电流下堵转330 ms后完成过流保护功能。该电路实现了对起动机启动过程的实时监测,确保了起动机的正常启动及发生故障时的快速响应,并增加了过温、欠压等保护功能,提高了电子继电器工作的可靠性。芯片面积为2.24 mm^2。An electronic relay control integrated circuit with time-sharing voltage sampling and protection was designed based on 0. 35 μm CMOS technology to overcome the disadvantages of the traditional electromagnetic relay in starting the starter,such as weaker protection ability,lower sensitivity,shorter life-time,larger volume and so on. In this circuit,the drain-source voltage and the overcurrent threshold voltage of power MOSFETs were sampled by the A/D sampling module,and a subtractor was adopted to compare the two voltages,which was used to judge whether the starter was blocked or not,and then to control the ON/OFF of the power MOSFET,furthermore,to judge the opening or turning off of the starter.The test results show that the electronic relay can start normally at the current of 400 A and the overcurrent protected function is completed after blocking 330 ms at the high currentof 500 A. The circuit realized the real-time monitoring of the starter during the starting process and ensured the normal start-up of the starter and the quick response when the fault occurs. The circuit added the protection functions such as over-temperature,under-voltage,etc.,and improved the reliability of the electronic relay. And the chip area is2. 24 mm^2.

关 键 词：单片集成电路 电子继电器 分时电压采样 实时监测 CMOS工艺 

分 类 号：TN43[电子电信—微电子学与固体电子学]