Power control subsystem with a plurality of current limit values

摘要

A power control subsystem for controlling the supply of power transmitted to at least one node over communication cabling, the power control subsystem comprising: a plurality of references; a plurality of comparators, each of the comparators being associated with a particular one of the plurality of references; and a current limiter in communication with the plurality of comparators and arranged to limit current of the power transmitted over communication cabling responsive to the plurality of comparators.

主权项

1. A power control subsystem for controlling the supply of power transmitted to at least one node over communication cabling, the power control subsystem comprising:
a plurality of power allocation circuits; a power supply providing a power input to each of the power allocation circuits; a control circuit providing control signals to each of the power allocation circuits; wherein each of the power allocation circuits comprises:
a current limiter arranged to limit current of the power input from the power supply to one of a plurality of values, the plurality of values being set by a plurality of programmable voltages;a plurality of references, each of the references provided by a respective one of the programmable voltages, wherein each of the plurality of programmable voltages is provided by a voltage source receiving a control signal from the management circuit; anda plurality of comparators, each of the comparators being associated with a particular one of the plurality of references,wherein the current limiter is in communication with, and responsive to, the plurality of comparators and wherein the plurality of values are a function of the plurality of references, the current limiter providing a current limited output signal to the communication cabling.