A number of extensions to the USB Specifications have progressively further increased the maximum allowable V_BUS voltage: starting with 6. Accessory charging adapters (ACA) are devices that provide portable charging power to an On-The-Go connection between host and peripheral.

specification mandates appropriate color-coding while it only recommends blue inserts for Standard-A USB3.Their compact design and compatibility make them a convenient choice for powering and connecting these devices, ensuring their smooth operation and functionality. Nevertheless, many USB host interfaces do not cut off the power supply to USB devices when they are suspended. How to configure the system to charge devices over USB port when it is off - idea/Lenovo laptops - NL".

This may also affect the way electric power used for small devices is transmitted and used in both residential and public buildings. Additional requirements for a more rugged connector that is durable past 10,000 cycles and still meets the USB 2. adds Extended Power Range (EPR) mode which allows higher voltages of 28, 36, and 48 V, providing up to 240 W of power (48 V at 5 A), and the "Adjustable Voltage Supply" (AVS) protocol which allows specifying the voltage from a range of 15 to 48 V in 100 mV steps. But I guess I still should use a standard A Male to Mini B Male between my powered PC and powered external HDD.

To enable Type-AB receptacles to distinguish which end of a cable is plugged in, plugs have an "ID" pin in addition to the four contacts in standard-size USB connectors. Upstream USB connectors supply power at a nominal 5 V DC via the V_BUS pin to downstream USB devices. Such devices can use an external power supply, which is allowed by the standard, or use a dual-input USB cable, one input of which is for power and data transfer, the other solely for power, which makes the device a non-standard USB device. Mini-B connectors are still supported, but are not On-The-Go-compliant; [12] the Mini-B USB connector was standard for transferring data to and from the early smartphones and PDAs.

Micro-USB was endorsed as the standard connector for data and power on mobile devices by the cellular phone carrier group Open Mobile Terminal Platform (OMTP) in 2007.Such a cable is non-standard, with the USB compliance specification stating that "use of a 'Y' cable (a cable with two A-plugs) is prohibited on any USB peripheral", meaning that "if a USB peripheral requires more power than allowed by the USB specification to which it is designed, then it must be self-powered. In June 2009, the European Commission organized a voluntary Memorandum of Understanding (MoU) to adopt micro-USB as a common standard for charging smartphones marketed in the European Union. defines an optional Programmable Power Supply (PPS) protocol that allows granular control over V BUS power, allowing a range of 3.

A self-powered hub is a device that provides high-power ports by supplementing the power supply from the host with its own external supply. For example, Apple's iPod and iPhone chargers indicate the available current by voltages on the D− and D+ lines. Apple, one of the original MoU signers, makes Micro-USB adapters available—as permitted in the Common EPS MoU—for its iPhones equipped with Apple's proprietary 30-pin dock connector or (later) Lightning connector.Dedicated charging ports can be found on USB power adapters to run attached devices and battery packs. The maximum allowed cross-section of the overmold boot (which is part of the connector used for its handling) is 16 by 8mm (0. USB Battery Charging ( BC) defines a charging port, which may be a charging downstream port (CDP), with data, or a dedicated charging port (DCP) without data. Please complete the purchase (or remove the quote – don't worry it's still available in My Account) before adding these additional items.