The USB Power Delivery (PD) Protocol is a universal standard enabling high-power delivery and flexible voltage negotiation through USB connections, primarily using USB-C connectors. Introduced to overcome traditional USB power limitations (e.g., 5V/2.5W), USB PD supports up to 100W (20V/5A), facilitating rapid charging for laptops, tablets, and smartphones. It dynamically negotiates power contracts between devices via the Configuration Channel (CC) pins in USB-C, allowing adjustable voltage levels (5V, 9V, 15V, 20V) to optimize efficiency and safety. This bidirectional communication ensures devices agree on optimal power levels, preventing overloads and enabling reverse charging features.
USB PD 3.0, the latest revision, enhances precision with Programmable Power Supply (PPS), offering incremental voltage adjustments for better thermal management and battery health. It integrates robust safety mechanisms, including over-voltage, over-current, and temperature protection. Beyond charging, USB PD powers peripherals like monitors and docks, streamlining connectivity. Backward compatibility ensures legacy devices charge at lower power, maintaining versatility.
PD Version | PD 2.0 | PD 3.0 | PD 3.1 |
Maximum Power | 100W | 100W | 240W |
Fixed PDO | 5V、9V、15V、20V | 5V、9V、15V、20V | 5V, 9V, 15V, 20V, 28V, 36V, 48V |
Programmable Power | X | 3.3-5.9V, 3.3-11V 3.3-16V, 3.3-21V | 3.3-5.9V, 3.3-11V 3.3-16V, 3.3-21V |
Adjustable Voltage | X | X | 15V-28V, 15V-36V 15V-48V |
Maximum Current | 5A | 5A | 5A |
Cable | 20V | 20V | 50V(EPR Cable) |
Tag：USB PD,PD
