USB power supply interface-based intelligent power source

Abstract

The invention relates to a USB power supply interface-based intelligent power source. The USB power supply interface-based intelligent power source includes a power storage carrier, a control module, a power supply control module, a USB power supply interface and a power supply control switch; the USB power supply interface includes a positive pole power supply end, a negative pole power supply end, a data line positive end, a data line negative end and a voltage comparator; the power supply control module is connected with the control module, the power storage carrier and the positive pole power supply end of the USB power supply interface respectively; the power storage carrier is connected with the control module; the grounding end of the control module is grounded; after passing through the power supply control switch, the negative pole power supply end of the USB power supply interface is grounded; the data line positive end and the data line negative end of the USB power supply interface are respectively connected with the voltage comparator; and the voltage comparator is connected with the control module. According to the USB power supply interface-based intelligent power source of the invention, the data line positive end and the data line negative end on the USB power supply interface can be detected, so that whether a load exists on the USB power supply interface of the power source can be accurately judged.

Description

technical field [0001] The invention relates to an intelligent power supply based on a USB power supply interface, and belongs to the technical field of intelligent power supply equipment. Background technique [0002] The power supply is a device used to store electric energy and supply power to other equipment and devices. With the progress of society, the level of electronic technology has been continuously improved, especially mobile electronic devices are developing rapidly. Various electronic devices meet the growing needs of people. With the frequent use of electronic equipment, the corresponding devices of electronic equipment are becoming more and more important. The first thing to bear the brunt is the power supply for electronic equipment, and with the continuous development of electronic equipment, in order to To meet the power supply requirements of more electronic devices, especially for the power supply of mobile electronic devices, more and more mobile electr...

AI Technical Summary

Problems solved by technology

[0002]The power supply is a device used to store electric energy and supply power to other equipment and devices. With the progress of society, the level of electronic technology continues to improve, especially mobile electronic devices With the rapid development, all kinds of electronic equipment meet people's growing spiritual and material needs. With the frequent use of electronic equipment, the corresponding devices of electronic equipment have become more and more important. The power supply for equipment power supply, and with the continuous development of electronic equipment, in order to meet the power supply requirements of more electronic equipment, especially for the power supply of mobile electronic equipment, more and more mobile electronic equipment adopts USB interface for power supply, among which, the power supply The device supplies power to the load connected to the USB power supply interface through the power supply terminal in the USB power supply interface, and the existing mobile power supply can not only provide power through the general USB power supply interface, but also detect whether there is power supply on the USB power supply interface. current to realize whether the load is connected to the USB power supply interface of the mobile power supply; but the existing method for judging whether the load is connected still has limitations, because the currents of various loads are very different, and the existing The detection accuracy of the current, similar to the existing technology, is difficult to detect the current close to 0, so that the detection of whether the load is connected to the USB power supply interface of the power supply becomes inaccurate, and it is impossible to obtain high-precision and accurate detection results. , due to the relatively large difference in the characteristics of the load, if the load is connected to the USB power supply interface of the power supply, but does not take power from the power supply for a period of time, it will lead to misjudgment of the power supply; and for the current detection progress, if you want to Detecting a very small current not only requires a high cost, but also increases the impedance on the current path, which will increase the loss of power supply energy transmission accordingly

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