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主要介绍了三极管反向偏压安全工作区(RBSOA)测试仪的硬件结构和相应的软件实现。该测试仪主要基于三极管的RBSOA及三极管的开关原理,并结合实际测试生产环境,设计了大功率电源供电电路、电流驱动电路、电压箝位电路、电流电压检测电路、单片机控制电路以及PC机的用户界面这6大模块。该测试系统采用了电感诱导控制电流和箝位电路限压,成功实现了对三级管集电极电流Ic和集电极-发射极电压Vce的控制;使用多点采样法,实现了可靠的电流电压检测。经过长期对不同型号和同一型号不同状况的三极管测试,成功验证了测试仪的性能和可靠性。 相似文献
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V. Enea 《Microelectronics Journal》2008,39(6):890-898
One of the main strength points of the new power actuator emitter-switched bipolar transistor (ESBT®) is its excellent safe operating area: as a matter of fact the emitter-switching concept enables the driving of the bipolar transistor in a much safer way compared to the traditional base-switching one. Nevertheless, at very high current density, well above the working ones, its ruggedness decreases a little when the saturation level, just before the turn-off, is extremely low or extremely high. This paper explains that in these conditions the device switches off not exactly in emitter-switching conditions or it is not properly sized. 相似文献
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