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Charging device and charging method

A charging device and charging current technology, applied in the field of communication, can solve the problems of high misjudgment rate of AC/USB insertion, high cost of charging circuit, and short exit time, etc., to achieve improved reliability and stability, low cost, and cost saving Effect

Active Publication Date: 2011-03-23
LEADCORE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, due to the short exit time of the new standard, the charging circuit of the existing mobile phone terminal that conforms to the new standard is not yet mature, and its problems are mainly manifested in three aspects. The cost is relatively high; third, there is a risk that the battery cannot be fully charged by USB charging

Method used

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  • Charging device and charging method
  • Charging device and charging method

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Embodiment Construction

[0039] Embodiments of the present invention provide a charging device and a charging method, which can not only improve charging reliability and stability, but also reduce costs. In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and examples.

[0040] In order to facilitate the understanding of the present invention, the characteristics of the AC charging current and the USB charging current are introduced first. First, if image 3 Shown is the AC charging current curve. From image 3 It can be seen that after the AC charging channel is opened, when the battery voltage VBATTrickle1 The determined current automatically charges the battery; when the battery voltage VBAT>3.0V, the charging enters the Trickle2 charging stage, and the hardware charging circuit starts to charge with R Trickle2 The determined current automatical...

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Abstract

The invention discloses a charging device and a charging method. The charging device comprises a charging type detecting circuit, a Trickle2 charging current control circuit and an alternating current / universal serial bus (AC / USB) charging current control circuit, wherein the charging type detecting circuit is used for detecting whether a charger inserted by a user is an AC charger or a USB charger; the Trickle2 charging current control circuit is used for controlling the Trickle2 charging current according to the detecting result of the charging type detecting circuit, wherein the Trickle2 charging current is less than 100mA in a USB charging state, and the Trickle2 charging current is larger in an AC charging state; and the AC / USB charging current control circuit is used for controlling the charging current of each phase of the AC charger or the USB charger according to the detecting result of the charging type detecting circuit, and AC and USB charging currents flow through the same passage. The invention has the advantages that the charging reliability and the charging stability are improved, and the cost is lowered.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a charging device and a charging method. Background technique [0002] Before 2007, mobile terminals supported both AC charging and USB charging, but AC charging and USB charging had different external physical interfaces. In 2007, the Ministry of Information Industry decided that mobile phone charging must comply with the new specification ("Mobile Communication Handset Charger and Interface Technical Requirements and Test Methods"). The new specification requires that mobile terminals not only support AC charging and USB charging, but also AC charging and USB charging. Charging shares the same external physical interface. In order to meet the new charging standard, it is necessary to redesign the internal charging circuit of the mobile phone. [0003] At present, the existing method is to judge whether the charging type is AC charging or USB charging through hardware, ...

Claims

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Application Information

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IPC IPC(8): H02J7/00G01R31/00H01M10/44
CPCY02E60/10
Inventor 范团宝
Owner LEADCORE TECH
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