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暂态抑制二极管冲击耐受性能的分析

DOI: 10.16188/j.isa.1003-8337.2015.04.010, PP. 48-54

Keywords: TVS管,残压,吸收能量,耐受性能,通流

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Abstract:

为了研究暂态抑制二极管(TVS)在雷电过电压作用下的耐受性能,通过对TVS管的原理分析并对19种不同击穿电压的TVS管进行冲击实验,利用示波器采集残压及通流的数据,计算TVS管的吸收能量。实验结果表明:TVS管两端施加的冲击电压越高,其两端残压及通流也将越大;随着冲击电压增大,TVS管分别经过箝位、临界、深度饱和及损坏四个状态;随着TVS管击穿电压的增大,TVS管的深度饱和状态对应的冲击电压区间变得越来越窄,当击穿电压大于170V,TVS管的深度饱和状态几乎没有,直接由箝位状态跳变为损坏状态;TVS管的吸收能量随冲击电压增大而增加,达到一定值时有趋于稳定的趋势。在TVS管的实际应用中具有一定的参考价值。

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