Device applied to interface electrostatic protection, interface and equipment

Abstract

The invention provides a device applied to interface electrostatic protection, an interface and equipment. The device comprises a USB (Universal Serial Bus) controller, a rear-end interface and an electrostatic protection module, the electrostatic protection module is located between the USB controller and the rear-end interface, one end of the electrostatic protection module is connected with the USB controller, and the other end of the electrostatic protection module is connected with the rear-end interface; the electrostatic protection module adopts an instantaneous voltage suppression array or an instantaneous voltage suppression diode; the instantaneous voltage suppression array is a bidirectional assembly formed by arranging diodes and a voltage stabilizing diode array, suppresses forward and reverse voltages, and is used for discharging electrostatic current transmitted by the USB controller interface. Based on the device, the invention further provides a USB interface and USB equipment. The invention provides a device applied to interface electrostatic protection, which can restrain 40% instantaneous voltage interference with an original state. The method is suitable for all USB transmission interfaces and equipment provided with USB interfaces, and has good universality.

Description

technical field [0001] The invention belongs to the technical field of static electricity protection, and in particular relates to a device, interface and equipment applied to interface static electricity protection. Background technique [0002] Electrostatic discharge has attracted much attention in recent years, especially as electronic products have entered the nanometer process, the volume is getting smaller and smaller, the working voltage is getting lower and lower, and the volume and weight are getting thinner and lighter. Matter is composed of molecules, molecules are composed of atoms, and atoms are the smallest particles that make up all chemical elements. They are composed of positively charged atomic nuclei and negatively charged electrons revolving around the atomic nuclei. Under normal conditions, the positive and negative charges carried by the atoms are equal, so they appear electrically neutral to the outside. But under certain conditions, when the electri...

AI Technical Summary

Problems solved by technology

In the current technology, the path of electrostatic energy release is strengthened by adding metal planes. This method can only be improved for less GND or incomplete GND fragmentation, and cannot improve power or signal interference by static electricity.

In view of the low performance of the RF module due to the electrostatic discharge protection component of the RF module, a small parasitic capacitance protection component is proposed. This suggestion is only applicable to the RF module and cannot be applied to the protection of differential signals.

The design consideration of static electricity protection is proposed for IC. This design consideration is to provide faster protection on the IC side when IC components are damaged by electrostatic interference. This method is feasible in application, but it cannot replace the protection on the actual application of the system side.

Therefore, for the traditional electrostatic protection design circuit, the enlarged metal conductor plane is used as shielding protection, and the enlarged ground plane is used as a discharge of electrostatic energy and isolating sensitive signals from electrostatic interference. The disadvantage of this design is a.) It cannot protect the power supply The line is disturbed by electrostatic discharge b.) It is impossible to protect the signal line from electrostatic discharge interference. Due to the lightness, thinness and small size of electronic products, the difficulty of protecting against electrostatic discharge is increasing day by day, especially when the commonly used USB transmission interface is often connected to the computer. Cause electrostatic discharge problems, which can cause computer restarts or crashes

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