公开(公告)号：US20140111180A1

公开(公告)日：2014-04-24

申请号：US13658769

申请日：2012-10-23

Applicant: BROADCOM CORPORATION

Inventor： Marius VLADAN ,  Sesha Panguluri

IPC: G05F3/02

CPC classification number: H04L12/413

Abstract: Systems and methods are provided for power control. In some implementations, a power control system includes a first transistor having a drain coupled to a first conductor (e.g., first pair of wires of an Ethernet cable), a second transistor having a drain coupled to a second conductor (e.g., second pair of wires of the Ethernet cable), a current sensor coupled to sources of the first and second transistors, and a current management circuit. The current management circuit may detect drain voltages of the first transistor and the second transistor, and adjust gate voltages of the first transistor and the second transistor to keep the drain voltages of the first transistor and the second transistor approximately equal. The current management circuit may detect a current through the current sensor, and adjust the gate voltages of the first transistor and the second transistor to limit the detected current to a current limit.

Abstract translation: 提供系统和方法进行功率控制。 在一些实施方式中，功率控制系统包括具有耦合到第一导体（例如，以太网电缆的第一对导线）的漏极的第一晶体管，具有耦合到第二导体（例如，第二对 以太网电缆的电线），耦合到第一和第二晶体管的源极的电流传感器，以及电流管理电路。 电流管理电路可以检测第一晶体管和第二晶体管的漏极电压，并且调节第一晶体管和第二晶体管的栅极电压，以保持第一晶体管和第二晶体管的漏极电压近似相等。 当前管理电路可以检测通过电流传感器的电流，并且调整第一晶体管和第二晶体管的栅极电压以将检测到的电流限制到电流限制。