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USB Power Delivery 3.0: what it is, how it works and what it does

USB Power Delivery 3.0 (USB PD 3.0) is a fast wired charging protocol that enables power transfer of up to 90W, extending USB standard capabilities for electronic devices.

Evidence-backed content 3 sources 05/09/2026
Encyclopedic article

Definition and Principles

USB Power Delivery 3.0 (USB PD 3.0) is a technical specification that defines how devices communicate to negotiate energy transfer over a USB cable. Its primary feature is the ability to support significantly higher power levels than previous versions, enabling high-performance fast charging.

Architecture and Functionality

The protocol operates through dynamic negotiation between the charging device (source) and the charged device (sink). This communication allows for adjusting voltage and current to maximize efficiency and safety during energy transfer.

  • Transport: Operates exclusively via wired connection.
  • Power capacity: Designed to handle transfers of up to 90W in fast charging configurations.
  • Direction: Supports energy transfer in the forward direction (from source to device).

Applications and Scope

USB PD 3.0 is commonly used in mobile devices, laptops, and other electronic equipment requiring fast recharging. Its presence in a product indicates that the device is compatible with chargers and cables supporting this standard, allowing for reduced charging times.

Limitations

While it offers 90W fast charging, this specific protocol is limited to wired connections. It should not be confused with wireless charging technologies or reverse charging functions, which operate under different specifications and power levels (such as 15W wireless or 5W/10W reverse charging, depending on region and device).

Interpretation in Products

When a product specifies support for PD3.0 with 90W power, it indicates that the device can accept high-voltage and high-current fast charging through a compatible USB port. This requires the use of a power adapter and cable that meet USB PD 3.0 specifications to achieve maximum power.

Note: The availability of additional features such as wireless charging or reverse charging depends on the region and specific device hardware, and is not inherent to the USB PD 3.0 protocol itself.

Aliases

  • USB PD 3.0
  • Power Delivery 3.0
  • USB Fast Charging 90W