交流输入电压下限输入电压低于该值后输出电压就不能稳定在线性电源中跌落电压主要决定于电源输入电压
The lower limit of the AC input voltage: When the input voltage is lower than this value, the output voltage cannot be stabilized. In a linear power supply, the drop voltage is mainly determined by the input voltage of the power supply
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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