Charging method, apparatus and system for mobile terminal, and mobile terminal
A mobile terminal and charger technology, applied in the field of communication, can solve the problems of USB charging line voltage increase, reduce charging signal circuit, large resistance, etc., achieve the effect of increasing speed, increasing charging current, and reducing line resistance
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Embodiment 1
[0045] Based on the above discussion, a schematic structural diagram of a mobile terminal proposed by this application is as follows: figure 1 As shown, it includes a USB port 101, a motherboard chip 103, a charging signal circuit 104, and a charging switch circuit 102. The introduction of each important characteristic component is as follows:
[0046] (1) The charging signal circuit includes a first signal line and a second signal line, which are located between the USB port and the motherboard chip.
[0047] (2) The USB port is used to connect with the charger, and its interface includes a charging interface, a grounding interface, a first signal interface, and a second signal interface. The charging interface is connected to the charging circuit, and the grounding interface is connected to the grounding wire. By default, the first signal interface is connected to the first signal interface of the motherboard chip through the first signal line of the charging signal circuit...
Embodiment 2
[0061] Based on the mobile terminal proposed in the first embodiment above, this application proposes a charging method for the mobile terminal, which is used to increase the current of the charging circuit and increase the charging speed of the mobile terminal when using a common USB charging cable for fast charging. Such as image 3 It is a schematic flow chart of a charging method for a mobile terminal proposed in this application. The method is applied to the mobile terminal as proposed in Embodiment 1. The method at least includes:
[0062] S301. When receiving a fast charging signal sent by the charger, send a first control signal to the charger through the motherboard chip.
[0063] The first control signal is used to instruct the charger to connect the first signal line and the second signal line of the charging signal circuit of the charger to the ground interface and the charging interface of the USB port of the charger respectively.
[0064] In the embodiment of th...
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