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Charging circuit, charging chip and charging control method of portable equipment

A technology for charging circuits and portable devices, applied in battery circuit devices, secondary battery charging/discharging, circuit devices, etc., can solve problems such as shutdown of portable devices, improve user experience, reduce voltage drop loss, and reduce instantaneous shutdown The effect of the probability

Active Publication Date: 2022-05-06
SHENZHEN SIYUAN SEMICON CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] After research, it is found that when the switching charging circuit is switched to the bypass charging circuit, there will be a problem of instantaneous shutdown of portable devices

Method used

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  • Charging circuit, charging chip and charging control method of portable equipment
  • Charging circuit, charging chip and charging control method of portable equipment
  • Charging circuit, charging chip and charging control method of portable equipment

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Embodiment Construction

[0030] The present invention is described below based on examples, but the present invention is not limited to these examples. In the following detailed description of the present invention, some specific details are described in detail, and in order to avoid obscuring the essence of the present invention, known methods, procedures, procedures, and components are not described in detail.

[0031] Additionally, those of ordinary skill in the art will appreciate that the drawings provided herein are for illustrative purposes and are not necessarily drawn to scale.

[0032] Unless the context clearly requires, throughout the specification and claims, "comprises", "comprises" and similar words should be interpreted in an inclusive sense rather than an exclusive or exhaustive meaning; that is, "including but not limited to" meaning.

[0033] In the description of the present invention, it should be understood that the terms "first", "second" and so on are used for descriptive purp...

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Abstract

The invention provides a charging circuit, a charging chip and a charging control method of portable equipment, the circuit comprises a voltage input end, a voltage output end and a control unit, and the charging circuit further comprises a first charging branch, a second charging branch, a first switching tube and a battery end; the first charging branch is a step-down switching circuit and comprises a main switching tube, a follow current switching tube and an inductor, the voltage input end is grounded through the main switching tube and the follow current switching tube, and the common end of the main switching tube and the follow current switching tube is connected with the voltage output end through the inductor; the second charging branch comprises a second switch tube, and the voltage input end is connected with the voltage output end through the second switch tube; the voltage output end is connected with the battery end through the first switch tube. According to the invention, the probability of instant shutdown of the portable device when the first charging branch circuit is switched to the second charging circuit can be reduced, and the user experience is improved.

Description

technical field [0001] The invention relates to the charging field, in particular to a charging circuit, a charging chip and a charging control method for a portable device. Background technique [0002] Today, portable devices are widely used, such as smartphones, smart watches, tablets, Bluetooth speakers, and so on. These portable devices have rechargeable batteries that can be charged by a charging device. [0003] Buck switching circuit is a common charging circuit. However, the buck switching circuit can still ensure high conversion efficiency when the input and output voltage difference is large, but when the input and output voltage difference is small, the difficulty of switching step-down will increase (there is Maximum duty cycle Vo=Vin*D). In order to further improve the charging efficiency and reduce the difficulty of implementation, the prior art (TW201933717A) proposes a charging circuit for portable devices, such as figure 1 As shown, the charging circuit ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/00H01M10/44
CPCH02J7/00712H02J7/00714H02J7/0029H01M10/44H02J2207/20H02J2207/40
Inventor 李经珊钟俊达周欢欢
Owner SHENZHEN SIYUAN SEMICON CO LTD
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