The USB interface is the most common interface in electronic products, and it is also the most common interconnection method between devices. However, technology is changing with each passing day, and the old interface has begun to be difficult to meet the new trend. The emergence of USB Type-C can solve many problems, not only high-speed data transmission, but also enables ordinary mobile power solutions to power laptops, and provides more space for future technology upgrades.
Why is USB Type-C so popular?
First of all, it comes from the demand for high-speed data transmission.
The latest USB3.1 has a maximum data transmission speed of 10Gbit/s. The Type-C that comes with the USB3.1 standard naturally also supports the high-speed transmission of USB3.1. (USB Type-C can also be from USB2.0, USB3.0 version, and the Type-C interface of some products on the market is not the USB3.1 version with technology 10Gbit/sec transmission)
Ease of use.
The top and bottom of the USB Type-C use the same contacts, so users don't have to distinguish the front and back of the USB. As the version number of the new physical form of the interface, the positive and negative insertion function is a major advantage of Type-C compared with the previous Type-A, Type-B, and Micro-USB. In addition, the durability has also been enhanced, and the specification supports 10,000 times of plugging and unplugging.
The trend of equipment miniaturization and the demand for multi-function.
Devices such as mobile phones need to be made thinner, and the physical size of the interface also needs to be smaller. The USB Type-C interface is mainly aimed at lighter and slimmer devices.
Nowadays, devices need to support more and more functions. Under the premise of the miniaturization trend, people hope that multiple functions can be satisfied without increasing the number of interfaces. And USB Type-C can support many different protocols and functions. For example, Apple’s new MacBook is equipped with only one USB Type-C interface, which integrates five functions such as power supply, USB data transmission, Display Port, HDMI, and VGA (USB3.1 supports display output)
Multifunctional application scenarios
Requirements for flexible power supply. The Type-C interface that supports USB PD can not only reach a high power supply of 100W; it also supports bidirectional power supply. The specific power supply direction conversion can be defined by the developer.
USB PD can implement two or more devices, or even a system-level power networking transmission based on the USB interface. The Type-C that supports USB PD has a DRP (Dual Role Port) dual-role port, which enables the connected device to switch the roles of Host and Device. For example, a notebook computer used as a power supply device in the past can also become a charged party, so that the mobile power solution realizes power supply to the notebook.
In addition, through USB PD, the Type-C interface can perform effective power management according to different scenarios and realize intelligent adjustment of power supply. For example, the above-mentioned safety certification restricts untrusted external charging devices from high-voltage charging; and when the voltage is higher than a preset value, the Type-C interface can be adjusted to a safe voltage to protect the device.
The needs of the market and users make the Type-C interface come into being. However, realizing the multi-function of the Type-C interface and the flexible and intelligent power supply capability cannot be accomplished by a single device, it requires a complete set of solutions. At the same time, considering the security protection of information, security certification also needs to be integrated.