Fast charging technology is constantly evolving. The USB Power Delivery 3.1 (PD 3.1) specification released by the USB-IF Association has increased the maximum charging power from 100W in PD 3.0 to 240W, marking a new stage of PD fast charging beyond "hundred watts".

1、 Core upgrade of PD 3.1: Extended Power Range (EPR)

PD 3.1 has added an Extended Power Range (EPR) on the basis of the original Standard Power Range (SPR).

·SPR (100W and below): Maintain existing standards with voltage of 5V/9V/15V/20V.

·EPR (140W to 240W): Three higher fixed voltage levels, 28V, 36V, and 48V, have been added to achieve a maximum power transmission of 240W through the USB-C interface.

2、 What does this mean for users?

1. Power supply for high-performance devices has become possible: Previous PD chargers were unable to meet the power consumption requirements of some high-performance gaming laptops and mobile workstations. In the future, a 240W charger that meets PD 3.1 standards is expected to power more high-power devices.

2. Charging scenarios may expand: In the future, even some household appliances, power tools, etc. may be powered through a unified USB-C interface and PD 3.1 protocol, promoting the development of "one line communication".

3. New requirements for cables: To achieve 240W charging, USB-C to USB-C cables that support EPR standards need to be used. Ordinary cables cannot withstand high voltage and pose safety risks.

3、 Current situation and prospects

Currently, Apple's 140W MagSafe charger is one of the early products to adopt PD 3.1 technology. As technology matures and costs decrease, we will see more brands launching high-power chargers and cables that support PD 3.1 in the future. Some domestic power supply companies, such as Shenzhen Huantong Electronic Technology Co., Ltd., have also invested research and development resources, focusing on the next generation PD 3.1 high-power power supply products, and are committed to bringing 240W charging solutions to the market.

Conclusion: The launch of PD 3.1 protocol is a power boost that helps promote the development of USB-C as a "universal power interface". A future driven by PD chargers for more electronic devices is worth looking forward to.