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While it is not necessary for USB-C compliant devices to implement USB Power Delivery, for USB-C DRP/DRD (Dual-Role-Power/Data) ports, USB Power Delivery introduces commands for altering a port's power or data role after the roles have been established when a connection is made. [34] USB 3.2 Specification
[1] [2] USB4 is only defined for USB-C connectors and its Type-C specification [3] regulates the connector, cables and also power delivery features across all uses of USB-C cables, in part [4] with the USB Power Delivery specification. [5] The USB4 standard mandates backwards compatibility to USB 3.x and dedicated backward compatibility with ...
The USB standard included power supply to peripheral devices; modern versions of the standard extend the power delivery limits for battery charging and devices requiring up to 240 watts. USB has been selected as the standard charging format for many mobile phones , reducing the proliferation of proprietary chargers.
USB Power Delivery Rev. 3.1 (V. 1.2) 2021-10-26 ... USB-C (officially USB Type-C) is a standard that defines a new connector, and several new connection features.
IEEE P1823 was a proposed global standard for a universal power adapter for mobile devices (UPAMD) that require between 10 W and 240 W. E.g., Laptops, larger tablets and other mobile devices that can require much more power than the (non-Power Delivery) USB battery charging specification limit of 7.5 W at 5 V. [25]
The article explains how USB devices transmit and receive data using electrical signals over the physical layer, how they identify themselves and negotiate parameters such as speed and power with the host or other devices using standard protocols such as USB Device Framework and USB Power Delivery, and how they exchange data using packets of ...