Backup power supply system

Abstract

An embodiment of the invention discloses a backup power supply system. The system comprises a backup cell, an input interface, an output interface and a button switch. The system also comprises a charging circuit, an electric quantity detection circuit, a booster control circuit, a button detection circuit, wherein the charging circuit is connected with the input interface and the backup cell andis used to charge the backup cell; the electric quantity detection circuit is connected with the backup cell and is used to detect the electric quantity of the backup cell; the booster control circuit is connected with the backup cell and the output interface respectively and is used to charge an external load; the button detection circuit is connected with the charging circuit, the electric quantity detection circuit and the booster control circuit and is used to control the electric quantity detection circuit and the booster control circuit according to a button signal of a button switch; the charging circuit, the electric quantity detection circuit, the booster control circuit and the button detection circuit are integrated in a master control chip. The backup power supply system of the embodiment of the invention possesses high integration and low standby power consumption. An external circuit structure is simple. The system is easy to be realized and cost is low.

Description

technical field [0001] The invention relates to the technical field of switching power supply and linear power supply, in particular to a backup power supply system. Background technique [0002] With the advent of the digital age, various portable electronic devices such as mobile phones, digital cameras, MP3, etc. have been popularized. More and more functions are integrated into electronic devices such as mobile phones, so the power consumption of these portable electronic devices has also increased sharply, and there is a higher requirement for battery capacity. However, for the sake of aesthetics and portability, the volume of electronic devices is getting smaller and smaller, and the capacity of batteries is limited. In order to meet people's demand for battery capacity, especially the demand for power when traveling, backup power for portable electronic devices has emerged as the times require. [0003] The battery of the backup power supply has more than 3 to 5 tim...

AI Technical Summary

Problems solved by technology

However, the backup power system currently on the market is mainly realized through the control of discrete devices and single-chip microcomputers. The charging system, discharging system and button control system are all set separately, so the volume is very large and it is not convenient to carry.

Images