Universal serial bus system

Abstract

The invention relates to a universal serial bus (USB) system, which is connected to a power supply end of an electronic product. The system comprises a USB concentrator, a power supply control switch, a plurality of USB interfaces and a plurality of current detection units, wherein the current detection units are not only electrically connected between the power supply end and the USB interfaces, but also connected with the power supply control switch in a communication manner. When an electronic device is inserted into one of the USB interfaces, the electronic device obtains a first power from the power supply end; and the current sense unit corresponding to the inserted USB interface sends a power start signal to the power supply control switch to start the power supply control switch, so as to enable the USB concentrator to obtain a second power from the power supply end.

Description

technical field [0001] The present invention relates to a bus system, in particular to a universal serial bus system with a universal serial bus hub. Background technique [0002] As users rely on electronic products, peripheral electronic devices are becoming more and more diversified. Therefore, many electronic products have begun to be equipped with more than one interface to connect multiple electronic devices at the same time. [0003] The most widely used interface on the market is the Universal Serial Bus (USB). However, in addition to the electronic products using the central processing unit of the X86 architecture, which can be directly configured with multiple USB interfaces, other architectures such as If some electronic products of RSIC and EPIC are to be configured with multiple USB ports, a USB hub must be configured as a bridge between the USB ports and the electronic products. [0004] see figure 1 , figure 1 It is a schematic diagram of a USB system with ...

AI Technical Summary

Problems solved by technology

[0005] It can be clearly found that no matter whether the electronic device 300 is plugged into the USB interface 11a or not, the USB hub 12 will extract the second working power P2 from the power supply end 200, which will cause power waste, especially when small electronic products For example, due to the limited internal space of a mobile phone or a notebook computer, the power of the battery that is equipped with it is small, and the USB hub 12 usually must use the second working power P2 greater than 100mA, which will cause the power consumption of the battery to be too fast and reduce the electronic power. Product usage time

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