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Wireless charging circuit, system and method and electronic equipment

A wireless charging and circuit technology, applied in battery circuit devices, circuit devices, conversion equipment without intermediate conversion to AC, etc., can solve the problems of low charging safety and low charging efficiency.

Inactive Publication Date: 2018-06-29
MEIZU TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Embodiments of the present invention provide a wireless charging circuit, system, method and electronic equipment to solve the problems of low charging efficiency and low charging safety in existing wireless charging circuits

Method used

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  • Wireless charging circuit, system and method and electronic equipment
  • Wireless charging circuit, system and method and electronic equipment
  • Wireless charging circuit, system and method and electronic equipment

Examples

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Embodiment 1

[0064] In order to solve the problems of low charging efficiency and low charging safety in existing wireless charging circuits, an embodiment of the present invention provides a wireless charging circuit. Wherein, the wireless charging circuit can usually be set in a corresponding terminal device, such as a mobile phone, a tablet computer, a smart watch, a camera, etc., for when the terminal device establishes a coupling connection with a corresponding wireless adapter, The electric energy received from the wireless adapter is transmitted to the battery to be charged of the terminal device. Of course, the wireless charging circuit can also be used independently, which will not be described in detail. Such as figure 1 As shown in , it is a schematic circuit structure diagram of the first wireless charging circuit described in Embodiment 1 of the present invention. Specifically, such as figure 1 As shown, the first type of wireless charging circuit may include a power receivi...

Embodiment 2

[0166] Based on the same inventive concept as the first embodiment of the present invention, the second embodiment of the present invention provides a wireless charging method, which can be applied to the wireless charging circuit described in the previous embodiment. For the same content, please refer to the first embodiment of the present invention. The relevant content of the present invention will not be described too much in the embodiment of the present invention. Such as Figure 11 As shown, it is a schematic flowchart of the wireless charging method described in Embodiment 2 of the present invention. Specifically, by Figure 11 It can be seen that the wireless charging method may include the following steps:

[0167] Step 1101: Receive the AC power transmitted by the power transmitting module of the wireless adapter;

[0168] Step 1102: converting the alternating current into direct current;

[0169] Step 1103: Collect the charging voltage and charging current of t...

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Abstract

The invention discloses a wireless charging circuit, system and method and electronic equipment. The wireless charging circuit comprises an electric energy receiving module, a rectifying module, a control module, a step-down conversion module and a charge pump charging module. The electric energy receiving module is used for receiving the alternating current transmitted by the electric energy transmitting module of a wireless adapter. The rectifying module is used for converting the alternating current into direct current. The control module is used for generating a first control signal in theconstant current stage. The step-down conversion module is used for adjusting the direct current according to the first control signal. The charge pump charging module is used for reducing the voltage of the adjusted direct current to the charging voltage and enhancing the current of the adjusted direct current to the charging current. Compared with the circuits in the prior art, the charge pumpcharging module having no inductance component is used as the charging module in the constant current stage so that the charging efficiency can be enhanced; besides, the current of the pre-circuit ofthe charge pump charging module is low and the coupling loss is low so that the charging efficiency can be further enhanced.

Description

technical field [0001] The invention relates to the technical field of charging, in particular to a wireless charging circuit, system, method and electronic equipment. Background technique [0002] As the functions of electronic devices become more and more powerful, the charging technology of electronic devices has also been continuously developed and improved. In order to improve the convenience of charging, wireless charging has gradually become a new charging trend. [0003] Specifically, there are very few terminal devices that can support wireless charging on the market, and the wireless charging circuit in these terminal devices usually needs to include a power receiving coil, a step-down converter (Buck converter) and a step-down charging circuit ( Buck Charger). First of all, since both the Buck converter and the Buck Charger include output inductors with coil loss and core loss, this may make the step-down conversion efficiency of the entire wireless charging circ...

Claims

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Application Information

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IPC IPC(8): H02J7/00H02J5/00H02M3/07
CPCH02J5/005H02J7/025H02M3/07Y02B40/00
Inventor 张林
Owner MEIZU TECH CO LTD
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