USB extension device with dual power supply, and dual power supply method

Abstract

A USB extension device with dual power supply includes: a first power connection interface of USB Type-C and power transmission specification connected to a first power supply; a second power connection interface connected to a second power supply; a host connection interface of USB Type-C and power transmission specification connected to a host; an external interface connected to an external device; and a power supply management module connected to the first power connection interface, second power connection interface, host connection interface and external interface. When the first and second power connection interfaces are connected to the first and second power supplies respectively, the host supplies power through the host connection interface, and the power supply management moduledrives the first power supply to supply power to the host, while driving the second power supply to supply power to the power supply management module and to at least one external device.

Description

technical field [0001] The present invention relates to a USB extension device, in particular to an extension device with dual power supplies supporting USB Type-C and Power Delivery specifications. Background technique [0002] Due to the thin and easy-to-carry design considerations, the current USB connection ports of notebook computers or tablet computers are decreasing, but it is still necessary to use external USB devices such as mouse, keyboard, printer, projector, optical drive and external hard disk. Therefore, This has greatly increased the demand for USB extension devices that can additionally connect USB devices. USB extension devices such as USB hubs (Hub) and USB docking stations (Docking Station) can allow multiple USB external devices to connect to USB hosts (such as laptops or tablet computers, etc.), increasing the number of external USB devices that can be connected to USB hosts. quantity. [0003] See figure 1 , figure 1 Block diagram for an existing s...

AI Technical Summary

Problems solved by technology

However, it is also possible to use an external DC power supply that is not of a higher standard. At this time, the total power consumption may be higher than the power supply of the external DC power supply, and various adverse conditions and possible dangerous situations of power consumption may also occur.

[0005] Based on the above, in addition, for the USB extension device 100 supporting the USB Type-C specification and the USB Power Delivery function, the external DC power supply must not only meet the power consumption standard of the USB extension device 100, but also need Considering the power consumption of the host computer 130 and external devices (151, 152, 153) connected to the USB extension device 100, once the power supply of the external DC power supply is insufficient, the host computer 130 will not be able to charge, or will charge slowly , or lead to various adverse conditions of the USB extension device 100 and external devices (151, 152, 153), what's more, dangerous situations such as overloading and overheating to burn occur, so the external DC power supply often needs to use a high-power power supply Providers (such as 120WPower Adapter) to support, however, in this way, unnecessary energy is consumed, and the power demand of the host 130 cannot be guaranteed (assuming that the power demand in the future is increased to 120W)

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