Overcurrent protection circuit and method for universal serial bus hub unit
US6064554A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 27, 1998 |
| Grant date | May 16, 2000 |
| Priority date | — |
| Expiry date | Apr 27, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F1/266
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An overcurrent protection circuit for a universal serial bus (USB) hub unit is comprised of a USB hub controller for controlling the operation of the USB hub unit, a plurality of power switches for switching operating voltages under the control of the USB hub controller respectively, a plurality of power output ports for transferring output voltages from the power switches to the subsequent USB hub units or peripheral devices respectively connected thereto, a plurality of overcurrent detectors respectively connected between the power switches and the power output ports for generating overcurrent detection signals when overcurrent flows to the subsequent USB hub units or peripheral devices, and a plurality of signal transfer/power interruption controllers each for transferring the overcurrent detection signal from a corresponding one of the overcurrent detectors to an input terminal of the USB hub controller and controlling a corresponding one of the power switches in response to a power interruption signal from an output terminal of the USB hub controller to interrupt the supply of power to a corresponding one of the power output ports. According to the invention, only one input te…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.