USB charging circuit short connection detection method and power adapter

A detection method and charging circuit technology, which are applied to battery disconnect circuits, battery circuit devices, current collectors, etc., can solve problems such as burning out mobile terminals, burning out TypeC connectors, and increasing micro-short-circuit temperature.

Inactive Publication Date: 2017-12-29
NUBIA TECHNOLOGY CO LTD
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Problems solved by technology

Because the pins of the Type C interface are more and densely arranged, repeated plugging and unplugging makes it easy for the Vbus pin to connect to other pins near the Vbus pin.
When the Vbus pin is connected to other peripheral pins (hereinafter referred to as "virtual short circuit"), the current of the charging circuit at this time may be several hundred milliamperes, which does no

Method used

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  • USB charging circuit short connection detection method and power adapter
  • USB charging circuit short connection detection method and power adapter
  • USB charging circuit short connection detection method and power adapter

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Embodiment Construction

[0040] It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0041] In the following description, use of suffixes such as 'module', 'part' or 'unit' for denoting elements is only for facilitating description of the present invention and has no specific meaning by itself. Therefore, 'module', 'part' or 'unit' may be used in combination.

[0042] Terminals may be implemented in various forms. For example, the terminals described in the present invention may include mobile phones, tablet computers, notebook computers, palmtop computers, personal digital assistants (Personal Digital Assistant, PDA), portable media players (Portable Media Player, PMP), navigation devices, portable Mobile terminals such as wearable devices, smart bracelets, and pedometers, and fixed terminals such as digital TVs and desktop computers.

[0043] In the following description, a mobile terminal will be...

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Abstract

The invention discloses a USB charging circuit short connection detection method and an adapter. The detection method includes the following steps: determining whether a charging physical connection is established between a USB adapter and a mobile terminal, and if a charging physical connection is established between the USB adapter and the mobile terminal, acquiring a preset number of output currents of the adapter and calculating the average value of the preset number of output currents; comparing the average value with a preset virtual short circuit judgment current value; and if the average value is greater than the preset virtual short circuit judgment current value, determining that there is a virtual short connection between the adapter and the mobile terminal, and giving corresponding prompt information, wherein the virtual short connection refers to that a power pin of a Type C port on the USB adapter or of a Type C port on a USB data line connected with the USB adapter is in contact with other pins around the power pin. Through the detection method, whether there is a virtual short circuit in a charging circuit can be determined quickly by comparing the output current value of the adapter with the preset virtual short connection judgment current value.

Description

technical field [0001] The invention relates to the technical field of USB charging management, in particular to a USB charging circuit short circuit detection method and a power adapter. Background technique [0002] Mobile terminals (such as smart phones, tablet computers, etc.) have become necessary tools in people's daily life, especially the various applications of mobile devices are becoming more and more extensive, making the power consumption of mobile terminals also increasing. For this reason, the battery capacity carried by the mobile terminal is also increasing, and people's requirements for the charging speed of the mobile terminal are also getting faster and faster. [0003] In order to meet the needs of fast charging of mobile terminals, more and more manufacturers use Type C interface (Type C interface includes 24 pins) instead of ordinary Micro USB interface (ordinary USB interface includes 5 pins). Since the Type C interface has many pins and the pins are ...

Claims

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Application Information

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IPC IPC(8): G01R31/02H02J7/00
CPCG01R31/50H02J7/00H02J7/0031H02J7/0036H02J7/0047
Inventor 蒋权
Owner NUBIA TECHNOLOGY CO LTD
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