Realization method of multi-power supply usb interface and usb power supply

Abstract

The invention relates to a realizing method for supplying electricity to multiple electric sources through a USB interface, and a USB electric source. The USB electric source comprises the USB interface, an electric source route management module and a control module, wherein the USB interface supports forward inserting and backward inserting; the electric source route management module comprises a first group of interfaces, a second group of interfaces and a switch array, the first group of interfaces are connected with an electric source supply socket of the USB interface, and the second group of interfaces comprises an interface connected with a first direct current supply and an interface connected with a second direct current supply; the control module can control the switch array according to information obtained from a control socket, so that the USB electric source can output the first direct current supply and / or the second direct current supply in a manner of supporting the forward inserting and the backward inserting; the first direct current supply is fundamental supply, and the second direct current supply is individual supply in accordance with USB equipment. According to the realizing method and the USB electric source disclosed by the invention, the electric source of the USB equipment can be simplified, the utilization efficiency of the electric source is improved, the energy consumption is reduced, heat dissipation measures are reduced, and the miniaturization of electronic equipment is facilitated.

Description

technical field [0001] The invention relates to a USB interface, in particular to using the USB interface to provide power supply. Background technique [0002] Since the current USB protocol stipulates that the USB interface is powered by a single 5V power supply, the default output of all current USB interface power supplies is 5V, and the USB interface electronic devices are all 5V power supply inputs. In practical applications, the internal modules of electronic equipment generally require different power supply voltages, such as: 12V, 5V, 3.3V, 1.8V, 1.2V, etc., and some even require more than 20V. At present, the power supplies required by the internal modules of electronic equipment are generated by step-down or step-up conversion of the 5V power input from the USB interface. There are some problems in the existing power supply mode: firstly, in the step-down and step-up conversion process of the power supply, due to the influence of the conversion efficiency, there ...

AI Technical Summary

Problems solved by technology

There are some problems in the existing power supply mode: firstly, in the step-down and step-up conversion process of the power supply, due to the influence of the conversion efficiency, there is a large amount of energy loss, which reduces the power utilization efficiency; secondly, the energy loss of the power conversion All of them are dissipated in the form of heat, which causes the temperature of electronic equipment to rise, and various heat dissipation measures are required to reduce the temperature rise; again, it limits the application of some high-performance but high-power consumption and high-voltage components in portable electronic equipment, such as : High-performance audio devices, high-performance motors, etc.

There are still some problems in this kind of improved power supply mode: first, the power supply voltage of the USB power supply is increased, and the withstand voltage requirements for the power step-down conversion module of the electronic equipment are increased, and the corresponding cost is increased; secondly, when changing from high voltage to low voltage, for example: When stepping down from 12V to 1.2V, the power conversion efficiency is low, causing unnecessary energy loss and the adoption of heat dissipation measures, which is not conducive to the miniaturization of electronic equipment

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