Overvoltage and undervoltage protection circuit

An under-voltage protection, circuit technology, applied in emergency protection circuit devices, protection against over-voltage, protection against under-voltage or no-voltage, etc. life and other issues, to avoid irreversible damage, reduce service life, and reduce costs

Inactive Publication Date: 2016-05-18
QINGDAO GOERTEK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When using an adapter to power the product, if the adapter is abnormal, or if you take the wrong adapter, it is likely to cause the input voltage to the electronic product to be greater than the maximum voltage that the device can withstand, resu

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  • Overvoltage and undervoltage protection circuit
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Embodiment Construction

[0022] In order to make the object, technical solution and advantages of the present invention clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0023] figure 1 A schematic diagram of a system structure of an overvoltage and undervoltage protection circuit provided by an embodiment of the present invention. Such as figure 1 As shown, the overvoltage and undervoltage protection circuit 110 provided by the embodiment of the present invention is used to be connected between the voltage source 120 and the load 130 , and includes a detection module 111 and a switch module 112 .

[0024] The input terminal of the detection module 111 is connected to the voltage source 120, and the output terminal is connected to the control terminal of the switch module 112 for judging whether the voltage of the voltage source 120 is greater than the high voltage threshold or less than the low volta...

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PUM

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Abstract

The invention discloses an overvoltage and undervoltage protection circuit which is used for connection between a voltage source and a load and comprises a detecting module and a switch module. The input end of the detecting module is connected with the voltage source, and the output end is connected with the control end of the switch module for determining whether the voltage of the voltage source is higher than a high-voltage threshold or lower than a low-voltage threshold and transmitting determination result information to the control end of the switching module. The input end of the switch module is connected with the voltage source, and the output end is connected with the load for controlling on or off between the input end and the output end according to the determination result information which is received by the control end. If the voltage of the voltage source is higher than the high-voltage threshold or is lower than the low-voltage threshold, the circuit between the input end and the output end is switched off; and otherwise, the circuit between the input end and the output end is switched on. When the voltage of the voltage source is higher than the high-voltage threshold or lower than the low-voltage threshold, the circuit between the voltage source and the load is switched off, thereby preventing product damage caused by overhigh input voltage and protecting the input voltage from excessive voltage drop. The overvoltage and undervoltage protection circuit has advantages of low cost and easy realization.

Description

technical field [0001] The invention relates to the field of circuit design, in particular to an overvoltage and undervoltage protection circuit. Background technique [0002] Currently, many electronic products are designed to be powered by adapters or batteries, such as mobile phones and laptops. When the adapter is used to power the product, if the adapter is abnormal or the adapter is taken by mistake, it is very likely that the input voltage to the electronic product is greater than the maximum voltage that the device can withstand, resulting in damage to the electronic product. When the battery is used for power supply, if the battery voltage drops to a certain value and continues to discharge, it is likely to reduce the life of the battery, and even cause irreversible damage to the battery. Contents of the invention [0003] In order to solve the above problems, the present invention provides an overvoltage and undervoltage protection circuit for connecting between...

Claims

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Application Information

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IPC IPC(8): H02H3/20H02H3/24
CPCH02H3/20H02H3/207H02H3/24
Inventor 于亚坤
Owner QINGDAO GOERTEK
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