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Control circuit of charging mode in USB charging stand and method thereof

A charging mode and control circuit technology, which is applied to battery circuit devices, secondary battery charging/discharging, circuit devices, etc., can solve the problems of high cost and poor general adaptability, and achieve the effect of both rapidity and low cost

Active Publication Date: 2008-07-30
ZTE CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The technical problem to be solved by the present invention is to provide a control circuit and method for the charging mode in the USB charging stand, which is used to solve the problem of AC / DC in the prior art The fast charging mode of the travel charger and the convenient USB charging mode are compatible with high cost and poor adaptability

Method used

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  • Control circuit of charging mode in USB charging stand and method thereof
  • Control circuit of charging mode in USB charging stand and method thereof
  • Control circuit of charging mode in USB charging stand and method thereof

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Embodiment Construction

[0049] The technical solutions of the present invention will be further described in more detail in conjunction with the accompanying drawings and specific embodiments.

[0050] As shown in FIG. 1 , it is a schematic diagram of the system of the embodiment of the present invention. In the charging control circuit 10, the USB charging stand 110 is a lithium-ion battery charging stand with a USB interface, and its USB interface 105 is a minUSB interface.

[0051] The USB charging stand 110 includes two charging power sources: a standard travel charging source 101 or a computer USB power source 100 . The charging power is used as the USB charging input power of the USB charging stand 110 . The standard brigade charging source 101 may be an AC / DC brigade charging source.

[0052] The data signal pins in the min USB interface 105 include: pin 1 (power supply), pin 2 (D-), pin 3 (D+), pin 4 (ID), and pin 5 (ground).

[0053] The pin 3 of the min USB interface 105 is used as the d...

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Abstract

The invention discloses a control circuit of charging mode in USB charging base and method thereof, which is used for controlling corresponding charging mode of a USB charging base according to different USB charging input power supplies connected with the USB charging base. The control circuit comprises a charging power determination circuit arranged in the USB interface of the USB charging base for determining the USB charging input power supply connected with the USB charging base and acquiring the type of the USB charging input power supply; and a charging management unit arranged in the USB charging base for setting charging current in a corresponding constant-current stage according to the level state of a detection pin corresponding to the USB charging input power supplied of different types, and entering corresponding charging mode. The invention can add the charging power supply determination circuit in the USB socket interface of the charging base at low cost and enter corresponding charging mode by setting a different charging current according to the different power supplies, thus achieving the control of the charging modes.

Description

technical field [0001] The invention relates to a charging mode control circuit and method, in particular to a charging mode control circuit and method of a lithium-ion battery charging stand adopting a USB interface. Background technique [0002] As the functions of mobile phones become more and more abundant, higher and higher requirements are put forward for battery capacity. Therefore, many high-end mobile phones with relatively large energy consumption are equipped with a main battery and a backup battery. The spare battery can be charged using the charging stand. At the same time, the mini USB interface has been widely used in the design of mobile phones because of its small size and fast information access speed, and has become a multiplex interface for chargers / data exchange of many mobile phones. [0003] Moreover, the latest communication industry standard of the People's Republic of China ("Mobile Communication Handset Charger and Interface Technical Requirement...

Claims

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Application Information

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IPC IPC(8): H02J7/00H01M10/44
CPCY02E60/10
Inventor 刘坤
Owner ZTE CORP
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