Overcurrent protection device and electronic equipment

Abstract

The invention belongs to the field of overcurrent protection circuit design, and provides an overcurrent protection device and electronic equipment. The overcurrent protection device comprises a switch unit, an overcurrent detection unit and a switch control unit, wherein the switch unit is used for controlling a protected load circuit being connected / disconnected through on / off states; the overcurrent detection unit is used for detecting the overcurrent on a power supply path of the protected load circuit; and the switch control unit is used for maintaining the switch unit being in the on state when the overcurrent detection unit does not detect the overcurrent; when the overcurrent detection unit detects the overcurrent, the switch control unit controls the switch unit being disconnected. According to the overcurrent protection device and electronic equipment provided by the invention, the switch control unit can control the switch unit on according to the external transient triggering or internal control, and then automatically maintains the switch unit being in the on state; the device and equipment have a state latching function; and the on state of the switch unit can be maintained without external triggering, and thus, the stability and reliability of the overcurrent protection device can be ensured.

Description

technical field [0001] The invention belongs to the field of overcurrent protection circuit design, in particular to an overcurrent protection device and electronic equipment. Background technique [0002] With the increasingly wide application of electronic devices in people's work and life, people have higher and higher requirements for the safety and reliability of electronic devices. Generally, electronic equipment has a rated current. If the supply current exceeds the rated current, it will easily cause damage to the electronic equipment. In order to ensure the safe operation of electronic equipment, current electronic equipment, especially in switching power supplies, are equipped with overvoltage The function of the current protection device is to ensure that when the power supply current input to the electronic equipment exceeds a certain value, the power supply is automatically cut off to protect the subsequent circuit from being damaged. [0003] Such as figure 1...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the embodiments of the present invention is to provide an overcurrent protection device, aiming to solve the problem of low operational stability and reliability of the overcurrent protection device provided in the prior art due to the inability to latch the state

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