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Linear charging circuit

A charging circuit, linear technology, applied in the direction of battery circuit devices, circuit devices, collectors, etc., can solve the problems of high charging efficiency, low charging efficiency, and high cost of switches, and achieve the effect of improving charging efficiency and solving serious heat generation

Inactive Publication Date: 2016-05-04
YULONG COMPUTER TELECOMM SCI (SHENZHEN) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Switch charging has high efficiency and high cost, and can be used for high-current charging; although linear charging is low in cost, it will cause serious heating of the terminal device when the charging current is large, and the charging efficiency is low

Method used

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Embodiment Construction

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Apparently, the described embodiments are some, not all, embodiments of the present invention. Based on the implementation manners in the present invention, all other implementation manners obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0026] An embodiment of the present invention provides a linear charging circuit, which can prevent terminal equipment from heating and improve charging efficiency of linear charging. Each will be described in detail below.

[0027] see figure 1 , figure 1 It is a linear charging circuit disclosed by the embodiment of the present invention. Such as figure 1 As shown, the linear charging circuit described in this embodiment includes a charger ...

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Abstract

Disclosed in the embodiment of the invention is a linear charging circuit comprising a charger, a control circuit, a power management chip and a battery. A first output voltage of the charger is connected with an output terminal of the charger by a control resistor; the output terminal of the charger is connected with a first input terminal of the control circuit; a first output terminal of the control circuit is connected with an input terminal of the battery; and a second input terminal of the control circuit is connected with an output terminal of the power management chip. The output terminal of the charger is used for outputting a second output voltage to the first input terminal of the control circuit; the control circuit adjusts the voltage outputted by the first output terminal of the control circuit according to the voltage inputted by the first input terminal of the control circuit and the voltage inputted by the second input terminal of the control circuit, and then the voltage at the input terminal of the battery is adjusted. The voltage inputted into the second input terminal of the control circuit is provided by the output terminal of the power management chip. According to the embodiment of the invention, the charging efficiency of the linear charging can be improved and the heating of terminal equipment can be prevented.

Description

technical field [0001] The invention relates to the technical field of electronic circuits, in particular to a linear charging circuit. Background technique [0002] There are two main charging methods for lithium batteries in terminal equipment such as mobile phones and tablet computers, one is switch charging, and the other is linear charging. Switch charging has high efficiency and high cost, and can be used for high-current charging; although linear charging is low in cost, it will cause serious heating of the terminal device when the charging current is large, and the charging efficiency is low. Contents of the invention [0003] An embodiment of the present invention provides a linear charging circuit, which can prevent terminal equipment from heating and improve charging efficiency of linear charging. [0004] An embodiment of the present invention provides a linear charging circuit, including: [0005] Including charger, control circuit, power management chip and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/00
CPCY02B40/00
Inventor 朱先鹏刘铁峰
Owner YULONG COMPUTER TELECOMM SCI (SHENZHEN) CO LTD
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