USB dual-port charger with interlocking control

Abstract

The invention discloses a USB dual-port charger with interlocking control. The USB dual-port charger comprises a power conversion module, a first interlocking circuit, a second interlocking circuit, afirst USB current limiting identification module, a second USB current limiting identification module, a first USB interface and a second USB interface; the power conversion module is used for converting 220V alternating current into 5V direct current, and the first interlocking circuit is electrically connected with the first USB current-limiting identification module; the second interlocking circuit is electrically connected with the second USB current-limiting identification module; the first USB current-limiting identification module and the second USB current-limiting identification module are electrically connected with the power conversion module, the first USB interface is electrically connected with the first USB current-limiting identification module, and the second USB interface is electrically connected with the second USB current-limiting identification module. When the charger works with a single port, full-power output can be achieved, and the requirement of a user forrapid charging is met. When the two ports work at the same time, the two interfaces output half power; it is guaranteed that the total output power of the charger does not exceed a rated power and then triggers overload protection.

Description

technical field [0001] The invention relates to the technical field of chargers, in particular to a USB dual-port charger with interlock control. Background technique [0002] There are more and more portable mobile devices, such as mobile phones or tablet computers. With the development of science and technology and the improvement of people's quality of life, people have put forward higher demands on the charging of portable mobile devices, and the traditional single-port USB output chargers can no longer meet this demand. Now many manufacturers have launched dual-port and multi-port USB charging devices, but most of the dual-port / multi-port USB charging devices are difficult to solve the following problems at the same time: [0003] (1) When the user only uses one interface, the other interfaces are idle, and the USB charging device does not have full power output. In this way, it is easy to cause the output power redundancy of the USB charging device to be too large, bu...

AI Technical Summary

Problems solved by technology

Now many manufacturers have launched dual-port and multi-port USB charging devices, but most of the dual-port / multi-port USB charging devices are difficult to solve the following problems at the same time:

[0003] (1) When the user only uses one interface, the other interfaces are idle, and the USB charging device does not have full power output. In this way, it is easy to cause the output power redundancy of the USB charging device to be too large, but it cannot satisfy the user's fast charging Require

[0004] (2) When the user uses multiple interfaces, all the interfaces are in the full power output state. In this way, it is easy to make the total output power of the USB charging device exceed the rated power and trigger overload protection. Make USB charging devices overheat and cause fire

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