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The information presented in this cross reference is based on TOSHIBA's selection criteria and should be treated as a suggestion only. Please carefully review the latest versions of all relevant information on the TOSHIBA products, including without limitation data sheets and validate all operating parameters of the TOSHIBA products to ensure that the suggested TOSHIBA products are truly compatible with your design and application.
Please note that this cross reference is based on TOSHIBA's estimate of compatibility with other manufacturers' products, based on other manufacturers' published data, at the time the data was collected.
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齐纳阻抗是齐纳二极管在传导电流时的等效串联电阻(ESR)。在理想情况下齐纳阻抗应为零,但实际上齐纳二极管具有一定的阻抗。因此,齐纳二极管仅在有限的电流范围内发挥作用。
齐纳二极管是一种专门用于在反向偏置状态下使用齐纳击穿的二极管。反向电流在齐纳电压下突然增加。换言之,齐纳电压仅略微依赖于反向电流。尽管如此,齐纳电压会随着电流的变化而变化。这种变化的速率称为动态阻抗。
如图1所示,齐纳二极管在较低和较高的电流区域表现出比指定动态阻抗更高的阻抗。在这些区域中,齐纳电压可能会随着电流或温度的变化而发生显著变化。在恒压电路中使用齐纳二极管时应小心。
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