An ESD protection circuit and an electronic device

Abstract

The embodiment of the invention provides an ESD protection circuit and an electronic device. The circuit comprises an input terminal, a ground terminal, an ESD protection device, a secondary protection circuit and an output terminal. The input terminal is used for receiving an ESD current signal when an ESD event occurs. The ESD protection device is respectively connected with the input terminal and the ground terminal, and is used for providing a discharge path for the ESD current signal, and guiding the ESD current signal from the input terminal to the ground terminal; The secondary protection circuit is connected in parallel with the ESD protection device and used for suppressing the ESD current signal; The output terminal is connected with the secondary protection circuit, and is usedfor connecting with the protected circuit. Thus, the ESD protection device and the secondary protection circuit can perform ESD protection on the protect circuit and reduce the influence of ESD on theelectronic components in the circuit.

Description

technical field [0001] The embodiments of the present invention relate to the field of electronic products, in particular to an ESD protection circuit and electronic equipment. Background technique [0002] With the continuous development of Internet technology and smart home, smart speakers, wearable devices, wireless earphones and other electronic devices have become necessities in people's daily life, allowing people to enjoy the convenience brought by technological development. [0003] In practical applications, static electricity is ubiquitous in daily life. For example, when the human body walks and rubs on the ground, the clothes on the human body rub against each other, the human body is in contact with electrostatically charged objects, and the human body is inductively electrified in an electrostatic field, etc. Static electricity accumulates on the human body, and when the person touches an electronic device, an Electro-Static discharge (ESD) process will occur, ...

AI Technical Summary

Problems solved by technology

The current signal will interfere with the electronic components on the PCB (Printed Circuit Board) of the electronic equipment, and even bring destructive consequences to the electronic components, causing the electronic components to malfunction or malfunction, resulting in Electronic equipment cannot work normally, for example, electrostatic discharge will cause wireless headset products to have problems such as Bluetooth disconnection, music playback stops, audio output is silent, and the headset heats up

[0004] Therefore, it is urgent to solve the problem that ESD interferes or even damages the electronic components of the circuit.

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