By PURPLELEC | 29 February 2024 | 0 Comments
How much current does the hub USB port provide?
The current supply capability of a USB hub depends on its design and how it is used. Under normal circumstances, a standard USB interface can provide a power supply current of approximately 500 milliamps (mA).
However, some specially designed USB hubs, such as the Purplelec USB3.0 hub, can provide high current output of up to 5 volts (V) and 2.4 amps (A) for a single USB port. This high current output capability is achieved through the use of an external adapter to ensure output voltage stability and high current supply.
For traditional bus-powered hubs, their downstream ports will not provide more than 100 milliamps (mA) when disconnected, disabled, or suspended. During normal operation, the current provided by these ports is also 100 milliamps (mA).
Self-powered hubs typically provide a total of no more than 500 milliamps (mA) to their own controllers, repeaters, and other downstream ports.
The current supply capacity of the hub's USB port varies by design and model, but in general, a standard USB port can provide about 500mA, and a hub with a higher current output capability may provide a higher current, depending on the value. Hub design specifications.
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