Large current charging protection method and system for USB interface

A USB interface and charging protection technology, which is applied to emergency protection circuit devices, automatic disconnection emergency protection devices, electrical components, etc., can solve the problems that the USB interface cannot withstand, large heat generation, etc., and achieve the effect of protection

Active Publication Date: 2015-07-08
ONEPLUS TECH SHENZHEN
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  • Application Information

AI Technical Summary

Problems solved by technology

The USB interface cannot withstand such a large amount of heat

Method used

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  • Large current charging protection method and system for USB interface
  • Large current charging protection method and system for USB interface

Examples

Experimental program
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Embodiment Construction

[0023] Such as figure 1 As shown, it is a flow chart of the USB interface high-current charging protection method.

[0024] The charging path of the USB interface is from the adapter—USB port—USB cable—USB B / C port—charging terminal. Generally, the two interfaces of USB A port and USB B / C port will burn out due to overheating. Because these two interface sockets are on the USB line, the USB line is provided with a temperature detection module for detecting the port temperature, a control module for controlling the on and off of the current switch module according to the port temperature, and a control module for controlling the temperature of the port. A current switch module for USB interface discharge and stop discharge.

[0025] Specifically, a USB interface high-current charging protection method includes the following steps:

[0026] Step S110, detecting the temperature at both ends of the USB interface, and judging whether the detected temperature exceeds a threshold....

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Abstract

According to a large current charging protection method and system for a USB interface, temperature detection modules are arranged at the two ends of the USB interface respectively and used for detecting the temperatures of the two ends of the USB interface, and if the temperatures do not exceed a threshold value, a charging current is output. If the temperatures exceed the threshold value, the current output of the USB port is switched off. Therefore, the USB interface can be protected from being burnt due to an excess temperature caused by an overlarge current, so that the large current charging protection effect for the USB interface is achieved.

Description

technical field [0001] The invention relates to large circuit charging protection, in particular to a USB interface large current charging protection method and system which are easy to operate. Background technique [0002] At present, the charging current through the USB cable is mostly set within 2A. A high-current charger produced by LITE-ON has a maximum current of 5V / 3A, but it does not have any protection on the USB interface. For high-current charging, if there is no protection on the interface, once the USB interface is short or poorly connected, it is easy to cause local overheating at the USB interface, which may cause the USB port to burn or even catch fire. For example, for a 5V / 3A charger, when the positive pole and the negative pole are slightly short to produce a resistance of 2 ohms, it will generate a heating power of 5*5 / 2=12.5W. The USB interface cannot withstand such a large amount of heat. Contents of the invention [0003] Based on this, it is nece...

Claims

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Application Information

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IPC IPC(8): H02H7/18H02H5/04
Inventor彭良才吴克伟
OwnerONEPLUS TECH SHENZHEN