Charging port short circuit protection method and device

Abstract

The invention relates to a charging port short circuit protection method and device, and belongs to the technical field of electronics. The method comprises the steps: existence of current between thevoltage wire of the electronic equipment and the ground wire is detected when the charging equipment is applied to charge the electronic equipment; if current exists between the voltage wire of the electronic equipment and the ground wire, the situation of short circuit occurs at the charging port of the electronic equipment; and the specified voltage is outputted to the charging equipment so that the charging equipment is enabled to start overcurrent protection and stop charging the electronic equipment. Whether the charging port of the electronic equipment is short-circuited is detected bydetecting the current between the VBUS pin and the GND pin of the electronic equipment so that charging of the charging equipment to the electronic equipment can be stopped in time when the short circuit occurs, thereby greatly improving the safety and avoiding the loss of property.

Description

technical field [0001] The present disclosure relates to the field of electronic technology, in particular to a method and device for short-circuit protection of a charging port. Background technique [0002] With the development of electronic technology, fast charging has become a common need of the public. However, fast charging requires a large charging current, which also brings some problems. For example, there are currently some situations where foreign matter enters the USB (Universal Serial Bus, Universal Serial Bus) charging port of the mobile device or may be used in a relatively humid environment. If under these circumstances, the pollution of foreign matter or the humid environment will cause a short circuit of the charging port, the charging current will form a current loop between the charger and the charging port, and when the current is large, the short-circuited charging port will generate a lot of heat. If the user does not find out in time, the mobile ph...

AI Technical Summary

Problems solved by technology

If under these circumstances, the pollution of foreign matter or the humid environment will cause a short circuit of the charging port, the charging current will form a current loop between the charger and the charging port, and when the current is large, the short-circuited charging port will generate a lot of heat. If the user does not find out in time, the mobile phone will be burned down at the slightest, and it will cause a fire at the worst.

This situation greatly affects the security of mobile devices

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