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Charging circuit, charger with USB port and charging system

A charging circuit and charger technology, which is applied to battery circuit devices, current collectors, circuit devices, etc., can solve the problems of burning terminal motherboards, excessive charging current, and damage to household appliances, etc.

Active Publication Date: 2016-06-01
BEIJING XIAOMI MOBILE SOFTWARE CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the charger is short-circuited or the protection fails due to some special circumstances, the charging current will be too large, which will burn the connector of the charger, burn the terminal board, and even cause damage to household appliances.

Method used

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  • Charging circuit, charger with USB port and charging system
  • Charging circuit, charger with USB port and charging system
  • Charging circuit, charger with USB port and charging system

Examples

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Embodiment Construction

[0043] Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatuses and methods consistent with aspects of the present disclosure as recited in the appended claims.

[0044]The abnormality of the charger with USB port can be divided into two situations: one is that the VBUS pin of the USB port is directly short-circuited, causing a large current; the other is that there are impurities or foreign objects on the VBUS pin of the USB port, causing the The impedance of the pin to ground is relatively small, causing most of the current to be lost during c...

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Abstract

The invention relates to a charging circuit, a charger with a USB port and a charging system, wherein the charging circuit comprises a voltage output circuit, a current output circuit and a first protective circuit, wherein the voltage output circuit receives an AC input by an AC power supply, carries out voltage transformation and rectifying treatment and outputs a DC to the current output circuit; the current output circuit receives the DC output by the voltage output circuit, carries out filtering treatment on the DC and then outputs the DC to terminal equipment; the first protective circuit is used for detecting whether a voltage on a live wire is greater than or equal to a preset voltage or not and / or a temperature on the liver wire is greater than or equal to a preset temperature or not, and outputting a first control signal to control the voltage output circuit to stop outputting of the DC when the voltage on the live wire is greater than or equal to the preset voltage and / or the temperature on the liver wire is greater than or equal to the preset temperature. Through the technical scheme, burn-out of a charger connector or a terminal mainboard and the like can be avoided; the response time of the cycle can be shortened; and the protection efficiency is improved.

Description

technical field [0001] The present disclosure relates to the technical field of terminals, and in particular to a charging circuit, a charger with a USB port and a charging system. Background technique [0002] At present, the charging current of terminals such as mobile phones and tablet computers is getting larger and faster, and the charging speed is also getting faster and faster, and even flash charging has been launched one after another. When the charger is short-circuited or the protection fails due to some special circumstances, it will burn the connector of the charger and the terminal board due to excessive charging current, and even cause damage to household appliances. Therefore, how to ensure the circuit safety of the charging circuit has become a technical problem to be solved urgently. Contents of the invention [0003] Embodiments of the present disclosure provide a charging circuit, a charger with a USB port, and a charging system, including the followin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/02H02H7/00H02H5/04
CPCH02H5/041H02H7/00H02J7/00304H02J7/027
Inventor 范杰王彦腾石新明
Owner BEIJING XIAOMI MOBILE SOFTWARE CO LTD
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