一种双通道栅极驱动电路设计

发布时间：2018-06-22 04:36

本文选题：SPIC + 隔离驱动　；参考：《电子科技大学》2015年硕士论文

【摘要】：在电力能源日益紧张的今天,节能倍受关注,功率器件得到了广泛应用,得益于功率器件和集成电路制造工艺的快速发展,智能功率集成电路(SPIC)在照明、汽车电子、工业控制、航空航天设备等方面,凭借其高可靠性、低功耗、高稳定性和小体积,有着功率组件和功率模块无法替代的优势,被广泛应用于各个领域。根据功率器件对栅极驱动信号的要求,基于CSMC的1μm BCD工艺平台,设计了一种双通道栅驱动电路,高低端输出信号间具有一定的死区时间,主要用于驱动半桥连接的功率器件。该栅驱动电路内部集成了完善的监测与保护功能,在电源出现欠压或者功率器件电流过大时,保护电路反馈回控制信号,关断高低端输出信号,在电压恢复正常后,再正常输出,在电流恢复正常后,经过一定的恢复时间能正常输出驱动信号。本电路的特点为:兼容前级电路发出的电压幅度为5 V或者3.3 V的控制信号,内部集成了磁隔离驱动电路,不需要集成耐高压的功率器件,相比其他的电平位移结构,有更低的功耗和更高的系统可靠性。本文的主要工作:具体分析了功率器件对栅极驱动信号的要求,并基于此,设计了一种双通道栅驱动电路的整体框图和具体指标。针对电路总体框图中的子模块电路,做了功能介绍,并通过比较分析,采用合理的电路结构,设计了子模块电路的电路图,并进行了仿真,对结果做了分析。在子模块电路中,着重介绍了输入级电路、监测与保护电路和隔离驱动电路。最后,给出了整体的仿真电路,并做了驱动电路的整体仿真。
[Abstract]:Nowadays, energy conservation is becoming more and more concerned, and power devices have been widely used. Thanks to the rapid development of power devices and integrated circuit manufacturing technology, intelligent power integrated circuit (SPIC) has been used in lighting, automotive electronics, industrial control. Because of its high reliability, low power consumption, high stability and small volume, aerospace equipment has the irreplaceable advantages of power modules and power modules, and has been widely used in various fields. Based on the 1 渭 m BCD technology platform of CSMC, a two-channel gate drive circuit is designed according to the requirements of the power device for the gate drive signal. There is a dead time between the high and low output signals, which is mainly used to drive the half-bridge connected power device. The gate drive circuit is integrated with perfect monitoring and protection functions. When the power supply is undervoltage or the current of the power device is too large, the protection circuit feedback back the control signal, turn off the output signal at the high and low end, and after the voltage returns to normal, Normal output, after the current return to normal, after a certain recovery time can normally output the driving signal. The characteristic of the circuit is that it is compatible with the control signal of voltage amplitude of 5 V or 3.3 V sent out by the previous stage circuit, and the magnetic isolation drive circuit is integrated internally, which does not need to integrate the high voltage resistant power device, compared with the other level displacement structure, Lower power consumption and higher system reliability. The main work of this paper is as follows: the requirements of power devices for gate drive signal are analyzed in detail, and based on this, a block diagram and specific specifications of a two-channel gate drive circuit are designed. This paper introduces the function of the sub-module circuit in the overall block diagram of the circuit. Through comparison and analysis, the circuit diagram of the sub-module circuit is designed by adopting a reasonable circuit structure, and the simulation is carried out, and the result is analyzed. In the sub-module circuit, the input stage circuit, the monitoring and protection circuit and the isolation drive circuit are introduced. Finally, the whole simulation circuit is given, and the whole simulation of the driving circuit is done.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN402

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