A charging circuit, a charging chip and a charging control method for a portable device

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: 2022-07-22
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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  • A charging circuit, a charging chip and a charging control method for a portable device
  • A charging circuit, a charging chip and a charging control method for a portable device
  • A charging circuit, a charging chip and a charging control method for a portable device

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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 only. In the following detailed description of the present invention, some specific details are described in detail. In order to avoid obscuring the essence of the present invention, well-known methods, procedures, procedures and elements are not described in detail.

[0031] Furthermore, 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 clearly required by the context, words such as "including", "comprising" and the like throughout the specification and claims should be construed in an inclusive rather than an exclusive or exhaustive sense; 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 the like are used for descripti...

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PUM

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Abstract

The invention provides a charging circuit, a charging chip and a charging control method for a portable device. The circuit includes a voltage input end, a voltage output end and a control unit, and the charging circuit further includes a first charging branch and a second charging branch , a first switch tube and a battery terminal; the first charging branch is a step-down switch circuit, including a main switch tube, a freewheeling switch tube and an inductor, and the voltage input end passes through the main switch tube and the freewheeling switch tube grounding, the common terminal of the main switch tube and the freewheeling switch tube is connected to the voltage output terminal through the inductor; the second charging branch includes a second switch tube, and the voltage input terminal passes through the second switch The tube is connected to the voltage output terminal; the voltage output terminal is connected to the battery terminal through the first switch tube. The present invention can reduce the probability of instantaneous shutdown of the portable device when the first charging branch is switched to the second charging circuit, thereby improving user experience.

Description

technical field [0001] The invention relates to the field of charging, in particular to a charging circuit, a charging chip and a charging control method of a portable device. Background technique [0002] Today, portable devices are used in a wide variety of applications, such as smartphones, smart watches, tablets, Bluetooth speakers, and more. These portable devices have rechargeable batteries that can be charged by the charging device. [0003] The step-down switch circuit is a common charging circuit. However, the step-down switch 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 a 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 ...

Claims

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Application Information

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Patent Type & Authority Patents(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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