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Short circuit protection circuit, charging power supply and electronic equipment

A short-circuit protection circuit and circuit technology, which is applied in the direction of safety/protection circuit, circuit device, battery overvoltage protection, etc., can solve the problems of insufficient power supply, triggering fire, and traditional power supply without targeted protection actions, etc., to achieve protection Charging safety and the effect of preventing excessive output voltage

Active Publication Date: 2021-10-01
SHENZHEN INJOINIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003]At present, under normal circumstances, the output current detection resistor can be included in the power supply product circuit. Once a short circuit occurs in the output current detection resistor, the traditional power supply does not have a targeted If the protection action occurs, or the power supply does not meet the requirements of LPS certification, it may trigger a fire or electric shock

Method used

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  • Short circuit protection circuit, charging power supply and electronic equipment
  • Short circuit protection circuit, charging power supply and electronic equipment
  • Short circuit protection circuit, charging power supply and electronic equipment

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Embodiment Construction

[0023] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiment of the application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiment of the application. Obviously, the described embodiment is only It is a part of the embodiments of this application, but not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of this application.

[0024] The terms "first", "second" and the like in the specification and claims of the present application and the above drawings are used to distinguish different objects, rather than to describe a specific order. Furthermore, the terms "include" and "have", as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, sy...

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Abstract

This application discloses a short circuit protection circuit, method, charging power supply and electronic equipment. The circuit includes a power supply, a control chip, a first resistor, a second resistor and an output port. The series relationship between the first resistor and the second resistor) establishes a mutual protection mechanism to protect the entire circuit. When there is a short circuit of components in the circuit, the output voltage of the power supply can be adjusted to meet the requirements of the LPS standard. Preventing excessive output voltage of the power supply from burning components and causing fires and other situations is conducive to ensuring the charging safety of power supply usage scenarios.

Description

technical field [0001] The present application relates to the technical field of electronic circuits, in particular to a short circuit protection circuit, a charging power supply and electronic equipment. Background technique [0002] With the vigorous development of electronic products, there are more and more power supply products with fast charging protocol on the market. For the protection of mobile phones and other charging equipment, the specification requirements of the protocol are becoming more and more stringent. Compliance with the specification requirements is the basic requirement of power supply products. Require. Among them, the LPS (Limited Power Source) requirements are specified in the IEC 60950 1 standard, which can be used to define the maximum voltage, current and relatively low capacitance of the power supply. [0003] At present, under normal circumstances, the output current detection resistor can be included in the power supply product circuit. Once...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J7/00
CPCH02J7/00308H02J7/00714
Inventor 陈伟
Owner SHENZHEN INJOINIC TECH
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