AC-DC back-up power supply based on singlechip microcomputer

Abstract

The invention discloses an AC-DC back-up power supply based on a singlechip microcomputer. The AC-DC back-up power supply comprises the singlechip microcomputer, a working condition display circuit, a fault alarm circuit, an AC-DC input circuit, a DC-DC conversion circuit, an automatic switching circuit, a DC voltage output circuit, a lithium battery pack, a discharge control circuit, a current-voltage detection circuit, a charging control circuit and a temperature detection circuit, wherein the singlechip microcomputer is connected with the working condition display circuit, the fault alarm circuit, the DC-DC conversion circuit, the discharge control circuit, the current-voltage detection circuit, the charging control circuit and the temperature detection circuit, the lithium battery pack is connected with the discharge control circuit, the current-voltage detection circuit, the charging control circuit and the temperature detection circuit, and the AC-DC input circuit, the DC-DC conversion circuit and the DC voltage output circuit are sequentially connected with the lithium battery pack through the automatic switching circuit.

Description

technical field [0001] The invention relates to an AC and DC backup power supply in the electronics industry. Background technique [0002] With the advent of the information society, AC and DC backup power supplies are widely used in all links from information collection, transmission, processing, storage to application. Skynet monitoring system, postal, telecommunications, mobile, financial securities, hospitals, electric power, military, petrochemical, industrial and mining enterprises, and various universities and other fields; its importance increases with the increasing importance of information applications . [0003] Most of the existing AC and DC power supplies do not have a backup energy storage battery, which is inconvenient to use in some occasions; when the AC power suddenly fails, the equipment stops working and the data is interrupted, causing irreparable losses. Contents of the invention [0004] The purpose of the present invention is to overcome the def...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a single-chip-based AC-DC backup power supply, which solves the problem that most of the existing AC-DC power supplies do not have backup energy storage batteries and is inconvenient to use in some occasions. Realize uninterrupted power supply around the clock, its low cost, short development cycle, easy to use and other advantages

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