Switching power supply short circuit automatic protection system based on single-chip microcomputer technology

Abstract

The invention discloses a switching power supply short circuit automatic protection system based on a single-chip microcomputer technology, and relates to the technical field of circuit protection, and the switching power supply short circuit automatic protection system comprises a single-chip microcomputer, and the output end of the single-chip microcomputer is electrically connected with the input end of a current acquisition unit. According to the switching power supply short circuit automatic protection system based on the single-chip microcomputer technology, automatic power-off protection can be carried out on a circuit, and meanwhile, the system automatically tracks and locks a fault position, so that the purpose of rapidly and accurately locking the short circuit fault position of the circuit is well achieved; according to the over-current protection system of the switching power supply, when a detected circuit is short-circuited, the over-current protection system can automatically trip and cut off the power supply to protect electrical components on the whole circuit, and can also realize quick tracking and locking of faults, and maintenance personnel do not need to check which position of the circuit is short-circuited one by one, so that the maintenance efficiency is improved. Therefore, the workload of circuit maintenance personnel is greatly reduced, and the maintenance of the switching power supply circuit by people is greatly facilitated.

Description

technical field [0001] The invention relates to the technical field of circuit protection, in particular to an automatic short-circuit protection system for switching power supplies based on single-chip microcomputer technology. Background technique [0002] Switching mode power supply, also known as switching power supply and switching converter, is a high-frequency power conversion device and a type of power supply. Its function is to convert a level of voltage into the voltage or current required by the user through different forms of architecture. The input of the switching power supply is mostly AC power (such as commercial power) or DC power, and the output is mostly required. DC power supply equipment, such as personal computers, and the switching power supply converts the voltage and current between the two. The switching power supply is different from the linear power supply. Most of the switching transistors used by the switching power supply are in the fully open ...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides an automatic short-circuit protection system for switching power supplies based on single-chip microcomputer technology, which solves the problem that the existing over-current protection system for switching power supplies can only realize automatic tripping when the detected circuit is short-circuited , cut off the power supply to protect the electrical components on the entire circuit, and then check which parts of the circuit are short-circuited one by one by the maintenance personnel, which greatly increases the workload of the circuit maintenance personnel, and cannot realize the automatic power-off protection of the circuit at the same time , the system automatically tracks and locks the fault location, which cannot achieve the purpose of quickly and accurately locking the short circuit fault location of the circuit

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