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A usb electrostatic protection device and terminal equipment

A technology for electrostatic protection and terminal equipment, applied in emergency protection circuit devices, circuit devices, emergency protection circuit devices for limiting overcurrent/overvoltage, etc., can solve the problem of damage to terminal equipment chips, general anti-static effect, and circuit area Large and other problems, to achieve the effect of preventing electrostatic shock

Active Publication Date: 2017-02-22
XIAOMI INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When an electrostatic separator is used, the circuit area of ​​the electrostatic separator is large, and the anti-static effect is average; when the terminal device is not powered on, the electrostatic separator does not work, and the internal chip of the terminal device may be damaged when it is directly charged through the USB interface

Method used

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  • A usb electrostatic protection device and terminal equipment
  • A usb electrostatic protection device and terminal equipment
  • A usb electrostatic protection device and terminal equipment

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Embodiment Construction

[0025] Preferred embodiments of the present disclosure will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present disclosure, and are not intended to limit the present disclosure.

[0026] figure 1 It is a USB electrostatic protection device provided by an embodiment of the present disclosure, and the device includes: an electrostatic protector 11 and a switch module 10 .

[0027] One input end of the switch module 10 is connected to one pin of the USB interface 20 outside the USB electrostatic protection device, and different input ends of the switch module 10 are connected to different pins of the USB interface 20 . like figure 1 One input terminal of the switch module 10 shown is connected to a pin of the USB interface 20, and four input terminals are respectively connected to the bus voltage pin VBUS, the positive data pin DATA+, the negati...

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PUM

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Abstract

The invention discloses a USB (Universal Serial Bus) electrostatic protection device and terminal equipment. The USB electrostatic protection device comprises an electrostatic protector and a switch module, wherein one input end of the switch module is connected with one pin of a USB interface outside the USB electrostatic protection device; different input ends of the switch module are connected with different pins of the USB interface; a control end of the switch module is connected with a bus voltage pin of the USB interface; the electrostatic protector is connected with the pins of the USB interface through the switch module; a power supply input end of the electrostatic protector is connected with the bus voltage pin of the USB interface; and when the USB interface is not in use, the switch module is in an on state. Bus voltage of the USB interface is used for controlling operation of the electrostatic protector and on and off of the switch module; when the USB interface is not in use, the switch module is in an off state; and even if the electrostatic protector does not operate at this moment, the electrostatic impact of the USB interface on a circuit and a chip in the terminal equipment can be avoided.

Description

technical field [0001] The present disclosure relates to the technical field of USB (Universal Serial Bus, Universal Serial Bus) interface, and in particular, to a USB electrostatic protection device and terminal equipment. Background technique [0002] The Universal Serial Bus is a serial port bus standard for connecting electronic devices with external devices. The feature of USB is that it supports hot-swapping, which can plug in or remove hardware when the electronic device is running, and plug-and-play, which can automatically detect and configure system resources when adding an external device. Therefore, USB is currently widely used in various devices such as personal electronic devices, mobile communication devices, photographic equipment, digital televisions, and game consoles. [0003] Due to the metal shell, the USB interface will withstand greater ESD (Electro Static Discharge, electrostatic discharge) impact. The two main damage mechanisms of ESD are: the heat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02H9/00
Inventor 徐兵李志杰孙伟
Owner XIAOMI INC