Introduction to USB Hub

USB hub is a device that can expand one USB interface to multiple and enable these interfaces to be used at the same time. The USB hub can be divided into USB2.0 hub, USB3.0 hub and usb3.1 hub according to the USB protocol.

 

The USB hub can extend a usb uplink interface to multiple downlinks, allowing a host to connect to multiple devices at the same time. Generally a hub bridge chip can expand 4 usb interfaces, while the commercially available one to 7 hub, in fact, uses two hub bridge chips, one of which is connected to the uplink port of another hub bridge chip‘s downlink port.

 

The USB hub uses a star topology to connect multiple USB interface devices.

USB hub can connect USB desk lamp, USB Fan, MP3, USB disk, recording pen, digital camera and so on.

*One USB interface can be expanded into multiple independent USB interfaces.

*The second generation USB hub controller is adopted.

*Directly connected to the computer, without external power supply, simple and easy to use.

*The computer automatically recognizes the installation, no driver, plug and play.

*Built in current overload and short circuit protection device.

 

1. USB-hub is a device that provides extended communication. Whether the hub can drive a 2.5-inch mobile hard disk without external power supply, it depends on the power supply capacity of the computer expansion port!

2. Generally, the 2.5-inch mobile hard disk needs to be powered by the computer or hub, and the 3.5-inch mobile hard disk needs to be additionally equipped with a high-power special power supply. Please do not directly connect such equipment.

3. Without external power supply: the current provided by the USB port of a computer is about 500mA, which is barely enough for a 2.5-inch mobile hard disk, and then consumed by the USB hub, which is not enough for an ordinary 2.5-inch mobile hard disk.

4. The front USB port of many compatible machines has been transferred. In addition, the power supply capacity is even worse due to material problems such as wires; It is very easy to make the mobile hard disk unusable or even lose data and damage the hard disk.

5. If your mobile hard disk makes a "click" sound, it is caused by insufficient power supply; For your mobile hard disk, it is recommended to connect the USB hub to the integrated USB port of the motherboard on the back of the chassis to ensure better contact and power supply.

6. Please use a high-quality USB cable when using the mobile hard disk. Ordinary USB cable, thin wire diameter, large loss, can not meet the power supply needs!

 

Q: In Vista operating system, plug in the USB hub (with 4 ports) and USB disk. The computer prompts that the speed can be increased. Can the speed be increased?

A: USB hub is just a tool to extend the USB interface. It is just an interface extension tool. In fact, any USB hub can only slow down the speed of USB devices, and it is absolutely impossible to speed up. The best way is to connect the USB device directly to the USB interface of the computer, rather than through the USB hub, especially the mobile hard disk, otherwise it will shorten its life.

Don‘t pay attention to this prompt, even if you change another socket, it won‘t work better. In addition, do not connect too many devices on the USB hub, and it is better to connect directly to the computer.

Q: why can‘t the mobile hard disk connected to the USB hub be used?

A: Because the power supply to the mobile hard disk is insufficient. The mobile hard disk is powered by USB port. The mobile hard disk is generally a notebook hard disk with 0.5A or 1A. The smaller the current, the lower the requirement for USB power supply, and vice versa. The USB hub does not have power supply, but uses the 5V power of the motherboard USB. You can try to choose a hard disk with low working current, and then buy a USB hub for a high-quality notebook.