With the development of electronic products, USB charging has become more and more popular, and the market demand for USB chargers and USB data lines has become larger and larger. Sinodec Industrial co., ltd. is a Chinese manufacturer specializing in the production of USB data cable and USB chargers for 16 years, we provide USB data cable and charger production and wholesale. Customized services are also available upon request.
However, the products on the market are now mixed, with fake and real, shoddy, how do customers choose? When the OEM/ODM method cooperates, what useful information will the customer provide? Below, let's take a look at the common sense of the USB data cable.
Wire specifications need to have a basic understanding
Please turn out the USB cable at will. All kinds of cable are generally designed and manufactured according to UL and CSA specifications. Usually, the line will be marked with the type and specification of the standard. It is not difficult to find some identification basis. UL is Underwriters Laboratories Inc., and CSA is the Canadian Standards Association. It is also an industry standard establishment and safety certification body.
When you purchase a USB cable, you can find the words such as AWM 2725 and E159272 in appearance. This is the design specification information that the line body follows. The UL and CSA specifications focus on the temperature and voltage values that wire can withstand, as well as the type of wire and suitable use, covering a wide range of fields. The mobile device transmits power conditions. Compared with the home, commercial environment, and industrial use, the voltage and current are low. In the normal use situation, it is not necessary to care too much about this difference, just need to know its literal meaning.
Charging depends on AWG specifications
USB cable body prints are generally 28AWG/2C+26AWG/2C or 28AWG/1P, 26AWG/2C and so on. The AWG is the American Wire Gauge American Wire Gauge, which is one of the design specifications for the internal components of wire and is the most commonly adopted industry standard. The number is the wire number used to indicate the wire diameter (in inches) of the wire, and the basic marking principles are 26AWG, 16AWG, and so on.
The smaller the AWG value, the thicker the wire diameter. Why is the wire with a smaller value instead thicker? The focus is on the difference in cross-sectional area. The USB cable is composed of many small soft copper wires and tinned soft copper wires. For example, 20AWG is inserted into 20 wires, and 10AWG is only 10 wires. Relatively speaking, each 10AWG wire has a relatively large diameter and the cross-sectional area is naturally larger than 20AWG. The wire diameter of these small wires is proportional to the amount of current that can be carried, that is, the thicker the higher the bearing capacity.▲ According to the standard design of the wire, there will be 2 isolation layers under the outer cladding material. Black, red, white and green are the real wires.
USB cable AWG mark decoding
To further understand the AWG marking method, the first group, such as 28AWG/2C, 28AWG/1P, refers to the USB data transmission wire portion. USB-IF requires a data line diameter of 28AWG. Since it does not include power transmission, manufacturers are mostly designed according to the specifications, and rarely see high-profile grid wire products. As for the difference between the 2C and 1P strings, C (Conductors) means 2 independent wires, and P is 2 woven wires, called P (Pair, pair). To represent.
The most relevant to the charging speed is the second group of marking information, namely 26AWG/2C, 22AWG/2C, etc. The power supply wires are basically separated and separated, so they are all 2C specifications. The USB-IF specification power line requirements are between 20 and 28 AWG, and less than 28 AWG is forbidden. In theory, which wire should be better should be obvious.