The PD charging protocol, which stands for USB Power Delivery, is currently the most widely used charging standard for electronic devices such as mobile phones, tablets, and laptops.

The PD charging protocol standard began in 2012. PD 2.0, released in 2014, uses the USB-C interface and has been widely popularized and applied. The latest standard is PD 3.1 released in June 2022. This agreement increases the maximum charging power from 100W to 240W, and the scope of use is no longer limited to digital electronic devices.

The difference between PD2.0/PD3.0/PD3.1

PD 2.0 uses a fixed voltage + variable current method to achieve charging within 100W. The fixed voltage ranges are 5V, 9V, 15V, and 20V. At present, most mobile phones are compatible with the second gear (9V / 2A), and most notebooks support the fourth gear (20V / 3.2 A -3.4A).

PD 3.0 adds a programmable power supply (PPS), and the voltage + current can be changed to be compatible with other fast charging protocols.

PD3.1 divides power into standard power range (SPR) and extended power range (EPR). SPR is PD3.0 PPS fast charging, which supports up to 100W; EPR has added three new voltage levels of 28V, 36V, and 48V, with corresponding currents of 5A (the maximum current that the USB-C port can withstand), and the output power can be up to Reach 240W.

For laptops, the PD3.1 standard can cover all high-performance gaming laptops, thereby replacing traditional DC power adapters. The PD3.1 specification covers the power supply of 24V motor drives and can be expanded to areas such as power tools and electric vehicles.