A power detection circuit and electronic product
A power supply detection and detection circuit technology, applied in the field of circuits, can solve problems such as threats to user safety and large leakage risks of electrical equipment, and achieve the effects of ensuring electricity safety, eliminating hidden dangers of electricity leakage, and improving electricity safety.
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[0020] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0021] The power supply detection circuit of this embodiment mainly includes a power supply terminal P1, a first detection circuit, a second detection circuit, a third detection circuit, and a control circuit U5. The power supply terminal P1 includes a live wire L, a neutral wire N, and a ground wire E. Plug socket for connecting external power supply, see figure 1 , figure 2 shown.
[0022] The first detection circuit mainly includes the first protection circuit and the first optocoupler circuit U1; the fire wire L is connected to the first input terminal of the first optocoupler circuit U1 through the first protection circuit, and the second input terminal of the first optocoupler circuit U1 is connected to The neutral line N, the output end of the first optocoupler circuit U1 is connected to the detection pin T1 of...
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