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Short-circuit protection circuit, charging power supply and electronic device

A short-circuit protection circuit and circuit technology, applied in safety/protection circuits, circuit devices, battery overvoltage protection, etc., can solve the problems of traditional power sources that do not make targeted protection actions, electric shock, and fire triggering

Active Publication Date: 2021-07-27
SHENZHEN INJOINIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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 device
  • Short-circuit protection circuit, charging power supply and electronic device
  • Short-circuit protection circuit, charging power supply and electronic device

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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

The invention discloses a short-circuit protection circuit and method, a charging power source and an electronic device. The circuit comprises a power source, a control chip, a first resistor, a second resistor and an output port, the power source can output current in a double-way mode, a mutual protection mechanism is established through the series connection relation between the two resistors (the first resistor and the second resistor), and the whole circuit is protected. When the short circuit condition of the components occurs in the circuit, the output voltage of the power supply can be adjusted to meet the requirements of the LPS standard, so that the situations such as fire disasters and the like caused by burning of the components due to overlarge output voltage of the power supply are prevented, and the charging safety of the power supply in the use scene is ensured.

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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IPC IPC(8): H02J7/00
CPCH02J7/00308H02J7/00714
Inventor 陈伟
Owner SHENZHEN INJOINIC TECH
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