USB PD fast charging protocol
USB PD (USB Power Delivery) is a charging protocol developed by the USB Implementers Forum (USB-IF). It not only supports charging small devices such as mobile phones and tablets, but also provides power for high-power devices such as laptops. This is because the maximum output power supported by the USB PD protocol can reach 240W (in the PD3.1 version), which is much higher than other common fast charging protocols.
The core advantage of the USB PD protocol is its intelligent power management. The protocol allows devices and chargers to conduct fine power negotiation in order to provide the most suitable charging voltage and current for the device. The USB PD protocol supports a variety of different voltage levels, including 5V, 9V, 12V, 15V and 20V, as well as the extended power capability introduced in the PD3.1 version, which can provide up to 48V.
It is worth noting that the USB PD protocol can not only charge devices, but also provide bidirectional power supply. This means that if your laptop supports the USB PD protocol, you can use it to charge your mobile phone or other devices.
The USB PD protocol is a very flexible and powerful charging protocol that can meet the charging needs of various types of devices.
The USB PD (USB Power Delivery) protocol has undergone multiple iterations and improvements, and the latest version is PD3.1. Here are the main technical features of each version:
PD1.0: This is the initial version of the USB PD protocol, which defines the maximum power output as 100W, achieved by using different voltage levels (5V, 12V, 20V) and currents (up to 5A).
PD2.0: Based on PD1.0, the PD2.0 version adds more power configuration options, including 5V, 9V, 12V, 15V, and 20V. In addition, PD2.0 also introduces battery information sharing, allowing devices to view battery status and adjust charging parameters as needed.
PD3.0: The PD3.0 version further optimizes the protocol and introduces Fast Role Swap (FRS), which can avoid power failure of devices when switching power roles. In addition, PD3.0 also adds a new feature called Programmable Power Supply (PPS), which allows finer-grained voltage and current adjustments, which is very helpful for improving charging efficiency and protecting battery life.
PD3.1: PD3.1 is the latest version of the USB PD protocol, which introduces extended power capabilities, with the maximum power support increased from 100W to 240W, and the voltage level can be as high as 48V. This enables the USB PD3.1 protocol to support higher-power devices, such as gaming laptops and even small appliances.
In general, from PD1.0 to PD3.1, the USB PD protocol continues to add new features and technologies, enabling it to better adapt to various types of devices and charging needs, providing a more efficient and safer charging experience.
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The USB PD (USB Power Delivery) protocol is very suitable for use in a variety of devices and application scenarios due to its high power support and a wide range of voltage levels. The following are some typical usage scenarios and applicable devices:
Smartphones and tablets: This is the most common usage scenario for USB PD. Many high-end smartphones and tablets support PD fast charging, which can charge devices quickly and safely.
Laptops: The PD protocol can support power output up to 100W (PD3.0) or even 240W (PD3.1), which makes it possible to charge laptops. In particular, some thin and light laptops, such as MacBooks, widely use the PD protocol for charging.
Gaming devices: Many gaming devices, such as Nintendo Switch, also support USB PD fast charging. Players can quickly charge their devices during the game without waiting for a long time.
Small appliances: With the PD3.1 version supporting power output up to 240W, some small appliances, such as portable air purifiers and even TVs, can be charged using PD.
Car chargers and mobile power banks: The wide voltage and high power output of the PD protocol also make it widely used in car chargers and mobile power banks. Users can use PD chargers or PD mobile power banks to quickly charge their devices while traveling or traveling.
Whether it is a mobile device or a home appliance, as long as fast and safe charging is required, the USB PD protocol can provide an excellent solution.