Power supply voltage detection circuit and electronic equipment

By using the breakdown characteristics of transistors and diodes in the power supply voltage detection circuit, the circuit structure is simplified, the power supply voltage is effectively detected, the complex circuit problems in the prior art are solved, and the normal state of the power supply voltage is ensured.

CN222299699UActive Publication Date: 2025-01-03SHENZHEN PHICOUSTIC SYST DEV CO LTD
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Patent Information

Application Number
CN202420079645.8
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-01-11
Publication Date
2025-01-03
Estimated Expiration
2034-01-11

AI Technical Summary

Technical Problem

The existing power supply voltage detection circuit is complex and it is difficult to effectively detect the overvoltage or undervoltage of the power supply voltage, which affects the normal operation of the load.

Method used

A power supply voltage detection circuit is designed to realize overvoltage and undervoltage detection using the breakdown characteristics of transistors and diodes, and the voltage state is reflected through the signal feedback terminal. The number of components is small and the circuit structure is simple.

Benefits of technology

It realizes effective detection of the voltage at the power supply terminal, reduces the number of components, and simplifies the circuit structure. It can accurately feedback overvoltage or undervoltage under normal power supply, ensuring the normal operation of the load.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a power supply voltage detection circuit and electronic equipment, the power supply voltage detection circuit comprises a signal feedback end, an overvoltage detection circuit and an undervoltage detection circuit, the overvoltage detection circuit comprises a triode and a first diode, the collector of the triode is used for connecting a normal power supply, and the normal power supply voltage of a power supply end is smaller than the breakdown voltage of the first diode. The collector of the triode is connected with the signal feedback end, the emitter of the triode is grounded, the base of the triode is connected with the anode of the first diode, the cathode of the first diode is connected with the power supply end, and the anode of the first diode is grounded. The under-voltage detection circuit comprises a second diode, the anode of the second diode is connected with a normal power supply, the cathode of the second diode is connected with the power supply end, the voltage of the normal power supply is smaller than or equal to the normal power supply voltage of the power supply end, and the anode of the second diode is connected with the signal feedback end to realize overvoltage and under-voltage detection. Compared with a traditional power supply voltage detection circuit, the number of components is small, and the circuit structure is simple.
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