Výběr rozbočovače USB závisí především na kvalitě externího napájení a za druhé na aplikaci zařízení, aby bylo možné ověřit, zda jste uživatelem vysokofrekvenčního připojení více zařízení-.
1. Podívejte se na externí napájecí zdroj
Affected by the USB current limit, the external power supply is very important to the USB Hub. The current limit of USB 2.0 is 500ma, and the power consumption of a mobile hard disk can easily reach 500ma. That is to say, if the hub is only connected to the mobile hard disk under multiple excuses, it will lead to insufficient power operation, so other connected devices can only receive a small amount of power and are unstable. In use, the hard disk may be damaged suddenly due to insufficient power supply, resulting in deviation of the positioning of the magnetic head in the hard disk, and data recording errors will occur directly.
Serious lack of power supply will reduce the speed of the platter, and the magnetic head may be permanently physically damaged due to insufficient suspension force and friction of the platter.
And there are still many USB devices with relatively high power consumption, such as 3G network cards, mobile phones, and USB fans. These things are basically stuck on the 500ma line. Even if you use an extension cable, try to use a short, good quality one, preferably one that can be plugged directly into the USB port on your computer. (USB fan is best to use a separate power supply) If it is placed on a passive USB interface, it is basically difficult to operate normally, and it also has a great impact on the lifespan.
2. Podívejte se na aplikaci zařízení
Common users who need to connect many devices should not be greedy for cheap, especially depending on the power supply. If it is often used for mobile, such as for notebook use, you can buy an ultra-portable passive Hub.
