Self-destruction overvoltage protection circuit
The utility model provides a self-destruction overvoltage protection circuit, and relates to the technical field of low-voltage direct-current power supply systems. The circuit comprises a first diode D1, a second diode D2 and a current-limiting resistor R1, the first diode D1 and the current-limiti...
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| Format: | Patent |
| Sprache: | chi ; eng |
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| Zusammenfassung: | The utility model provides a self-destruction overvoltage protection circuit, and relates to the technical field of low-voltage direct-current power supply systems. The circuit comprises a first diode D1, a second diode D2 and a current-limiting resistor R1, the first diode D1 and the current-limiting resistor R1 are connected in series, the negative electrode of the first diode D1 is connected with the positive electrode of an output power supply, the current-limiting resistor R1 is connected with the negative electrode of the output power supply, and the second diode D2 is connected with the first diode D1 and the current-limiting resistor R1 in parallel. The anode of the second diode D2 is connected with the anode of the output power supply, and the cathode of the second diode D2 is connected with the cathode of the output power supply. The silicon controlled rectifier is connected between the positive and negative outputs of the power supply, so that the silicon controlled rectifier does not work when the |
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