Full range of USB HUB & Type C Adapter Converter manufacturer in China
FBELE has been committed to providing you with various usb-c hubs type-C hub usb-c adapters and C-type smart card readers CAC credit card readers and USB3.0 xqd cfexpress card readers and writers and wall chargers for many years car chargers iPhone chargers QC chargers
- USB-C to DisplayPort,USB-C to VGA
- USB-C to HDMI,USB-C to Ethernet
- Easy to operate and use
- Customized on demand
What is USB HUB
USB hub refers to a device that can expand one USB interface to multiple interfaces and use these interfaces at the same time. USB hub can be divided into USB2.0 hub, USB3.0 hub and usb3.1 hub according to its USB protocol. First of all, the word is divided into USB and hub
USB HUB
First, USB is the abbreviation of universal SerialBus in English and “universal serial bus” in Chinese, also known as universal serial interface.
Second, hub is the hub that everyone often says. It uses a star topology to connect multiple USB interface devices.
USB hub, which can connect computer lamp, computer fan, MP3, U disk, recording pen, digital camera, etc
*One USB interface can be expanded into multiple USB interfaces that work independently.
*Adopt the second generation USB hub controller
*Directly connected to the computer without external power supply, simple and easy to use
*The computer can automatically identify and install without driver, plug and play, and plug and unplug freely
*Support USB2.0, speed up to 480mbps, downward compatible with USB1.1
*Built in current overload short circuit protection device
*System support: win95/98/me/2000/xp, linux2.4andmac os8.5 or above
Why Purchase FBELE USB HUB & Type C Adapter Converter
When users use external devices, they do not need to turn off and then turn on the computer, but directly plug in the USB when the computer is working.
USB devices are mostly small, light and thin. It is very convenient for users to carry a large amount of data with them. Of course, USB hard disk is the first choice.
The common ones are the hard disk with IDE interface, the mouse and keyboard with serial port, and the printer and scanner with parallel port. However, with USB, all these application peripherals can be connected to the PC with the same standard
USB often has multiple interfaces on personal computers, which can connect several devices at the same time. If a USB hub with four ports is connected, it can be connected again.
What How to Use USB HUB
- Usb-hub is a device that provides extended communication. Whether the hub can drive a 2.5-inch mobile hard disk when it is not connected to an external power supply mainly depends on the power supply capacity of the computer expansion port!
- 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 connect such equipment directly;
- Without external power supply: the current provided by a computer USB port is about 500mA, which can only be used for a 2.5-inch mobile hard disk, and then consumed through the USB hub, which is not enough for an ordinary 2.5-inch mobile hard disk.
- The power supply capacity of the front USB port of many compatible computer chassis is even worse due to the additional transfer and the material problems such as wire; It is very easy to make the mobile hard disk unusable, even lose data and damage the hard disk;
- 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 [3]
- Please use the original USB power cable when using the mobile hard disk. Ordinary USB cable, with small diameter and large loss, cannot meet the power supply needs!
Operating principle of USB hub
The USB hub is used for device expansion connection. All USB devices are connected to the port of the USB hub. A USB host is always connected to a root hub. The USB hub provides 100mA current for each port of the USB hub to be used by the device. At the same time, the USB hub can diagnose the plug-in operation of the device through the electrical changes of the port, and report the port status to the USB host by responding to the data packet of the USB host. Generally speaking, the length of the connection between the USB device and the USB hub shall not exceed 5m, and the cascade of the USB system shall not exceed 5 levels (including the root hub).
Each downstream interface of the USB hub will share the bandwidth of the upstream interface. In addition, the USB hub itself also needs to transmit control signals, so the bandwidth of each downstream device must be less than the total bandwidth of the upstream device.
As a matter of fact, it is difficult for mainstream USB 3.0 devices to occupy the full bandwidth (5Gbps). For example, mainstream USB 3.0 disks only have a transmission speed of 100mb~200mb/s, and the equivalent bandwidth is less than 2gbps. Therefore, the actual situation is not certain.
The principle of the USB hub is complex. The most complex part in the USB protocol specification is the chapter of the hub. The principle of the USB hub is quite different from that of the network device (Ethernet). If analogy is really needed, the complexity is probably equivalent to that of the router in the network device.
The USB protocol has four modes: control transmission, bulk transmission, interrupt transmission and synchronous transmission, among which:
Control transmission is used to transmit commands at the level of control equipment;
Bulk transfer (Chinese name may be called batch transfer) is mainly used to transfer various large USB data, such as data read and written by USB flash disk;
Interrupt transmission is used to transmit small pieces of data. The mouse and keyboard mainly use interrupt transmission;
Synchronous transmission is used to transmit data with insufficient real-time performance, that is, reliability is not guaranteed. Some USB audio devices use this transmission;
The USB hub is responsible for integrating various transmission signals of downstream devices. There are certain restrictions on synchronous transmission. If it exceeds a certain proportion of the total bandwidth (20% in memory), the synchronous transmission exceeding the proportion will be discarded; Interrupt transmission and control transmission occupy reserved bandwidth and are not allowed to be discarded; Bulk transmission takes up the remaining bandwidth. If there is no synchronous transmission, bulk transmission can take up more than 90% of the total bandwidth.
After the USB hub integrates the data, it sends it to the upstream device. If there is a USB hub in the upstream, the upstream device will continue to do the same. In addition, it should be noted that generally speaking, the USB interface on the host itself is a root hub. If a PC has multiple interfaces, it may be that multiple interfaces share a controller, and each controller has a root hub.
So the USB hub is equivalent to re encapsulating various data packets, which is similar to the router in the network device, rather than the switch or hub.
China Leading USB HUB & Type C Adapter Converter Supplier
FBELE,electronics manufacturers provide usb-c solutions, switch to HDMI /2*usb3.0 /rj45 /pd charging data storage solutions, and adopt international first-line chip solutions to support multi-function output Sufficient supply, affordable, professional and reliable
FBELE,USB type-C hub docking stations are mainly used for type-C interface function expansion, which can easily realize type-C expansion USB3.0 interface, dp/vga/hdmi display interface, type-C charging port and other applications. The USB type-C docking station scheme includes a USB PD interface control chip
FBELE, USB multi port connector, mobile phone USB connector, precision connector, professional R & D and production of Beidou connector, spot supply, RF connector, wire connector, terminal connector, connector manufacturer, product standard, stable quality, complete specifications, welcome to consult
What does customer say about FBELE Company
We are a small online store that just opened in 2021. We have just started doing business, so we need less quantity and more varieties. Fbele will treat all orders equally no matter how many. We hope to have more cooperation in the future.
Before we found FBELE, we cooperated with another factory manufacturer. Due to the quality problem at that time, we tried to cooperate with FBELE. Unexpectedly, the quality of FBELE products is very stable. At present, the cooperation has been nearly 10 years. We hope FBELE will always supply us.
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