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好吧问答库 > 三端稳压器件L7912cv的输入电压是正还是负？

三端稳压器件L7912cv的输入电压是正还是负？

2025年03月15日 20:01

有2个网友回答

网友（1）：

79系列三端稳压器输入要求是负电压，为了保证能输出稳定电压，要求输入电压最低要大于稳压器输出电压的2V以上，对于7912就是14V，最高输入电压是输出电压加三端的耐压，7912最大输入电压可达52V。

网友（2）：

是负的，78系列是正的。
-18到-14v。

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