Over-current protection circuit
A protection circuit and overcurrent technology, which is applied to emergency protection circuit devices, emergency protection circuit devices, and circuit devices used to limit overcurrent/overvoltage, and can solve the problem of large current, large electronic equipment failure, and incapable of large current Discharge and other issues, to achieve the effect of simple circuit structure, effective protection, and low cost
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Embodiment 1
[0013] An overcurrent protection circuit, characterized in that it includes a first field effect transistor, a second field effect transistor, a third field effect transistor, a silicon controlled rectifier, a voltage divider circuit, a third resistor, a fourth resistor, and a fifth resistor , a comparator and a triode, the drain of the first field effect transistor is connected to one end of the voltage divider circuit and one end of the third resistor and connected to the drain of the second field effect transistor, the fifth resistor and the second field effect transistor respectively through the fourth resistor and the fifth resistor The drain of the third field effect transistor is connected, the gate of the third field effect transistor is connected to its source and connected to the power supply at the same time, the other end of the voltage divider circuit is grounded, and the third resistor The other end of the resistor is connected to the base and collector of the tri...
Embodiment 2
[0015] This embodiment is refined on the basis of the above embodiments, that is, the voltage dividing circuit includes a first resistor and a second resistor, and the first resistor and the second resistor are connected in series.
[0016] Both the first field effect transistor and the third field effect transistor are P-type field effect transistors, and the second field effect transistor is an N-type field effect transistor.
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