self-powered hub

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self-powered hub

Typically refers to a USB hub that plugs into an AC outlet for power. Contrast with "bus-powered hub," which obtains its power from the USB connection. See USB.
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The ON-resistance of each switch is 400 milliohms, which satisfies bus-powered hub requirements and reduces cost.
Devices for bus-powered hub applications face severe cost challenges," said Kris Jones, product marketing manager for USB devices at Micrel.
3V and 5V inputs, and its low on-resistance switch element ensures that the voltage drop across the device is only 40mV (typical) at full load, allowing designers to easily meet the 350mV USB voltage drop specification for a bus-powered hub.
In addition to USB self-powered and bus-powered hub applications, the SC5826 is ideal for powering today's root hubs in desktop PCs and workstations, notebook PCs and peripherals.
A bus-powered hub draws power from the host computer and can supply up to 500 milliamperes at 5 volts.
Entrega's self-powered hubs ensure a positive out-of-box experience for consumers by adhering to the USB specification for adequate power distribution per port -- a problem that has plagued bus-powered hubs.