Power over ethernet controller integrated circuit architecture
First Claim
1. A Power Source Equipment (PSE) controller, implemented as part of a PSE, for a Power-over-Ethernet (PoE) communication system, the PSE providing power and data communications to a Powered Device (PD), comprising:
- a current measurement system configured to measure a current of the PD to provide a measured current;
a voltage measurement system configured to measure a voltage of the PD to provide a measured voltage;
a temperature measurement system configured to measure a temperature of the current measurement system to provide a measured temperature; and
a multiplexer configured to time-division multiplex the measured current, the measured voltage, and the measured temperature to provide a time-division multiplexed signal including a plurality of channels, the multiplexer being further configured to multiplex the measured current into a first channel from among the plurality of channels, the measured voltage into a second channel from among the plurality of channels, and the measured temperature into a third channel from among the plurality of channels.
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Accused Products
Abstract
Power over Ethernet (PoE) communication systems provide power and data communications over the same communications link, where a power source device (PSE) provides DC power (for example, 48 volts DC) to a powered device (PD). The DC power is transmitted simultaneously over the same communications medium with the high speed data from one node to the other node. The PSE typically includes a controller that controls the DC power provided to the PD at the second node of the communications link. The PSE controller measures the voltage, current, and temperature of the outgoing and incoming DC supply lines to characterize the power requirements of the PD. In addition, the PSE controller may detect and validate a compatible PD, determine a power classification signature for the validated PD, supply power to the PD, monitor the power, and reduce or remove the power from the PD when the power is no longer requested or required. During detection, if the PSE finds the PD to be non-compatible, the PSE can prevent the application of power to that PD device, protecting the PD from possible damage.
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Citations
20 Claims
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1. A Power Source Equipment (PSE) controller, implemented as part of a PSE, for a Power-over-Ethernet (PoE) communication system, the PSE providing power and data communications to a Powered Device (PD), comprising:
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a current measurement system configured to measure a current of the PD to provide a measured current; a voltage measurement system configured to measure a voltage of the PD to provide a measured voltage; a temperature measurement system configured to measure a temperature of the current measurement system to provide a measured temperature; and a multiplexer configured to time-division multiplex the measured current, the measured voltage, and the measured temperature to provide a time-division multiplexed signal including a plurality of channels, the multiplexer being further configured to multiplex the measured current into a first channel from among the plurality of channels, the measured voltage into a second channel from among the plurality of channels, and the measured temperature into a third channel from among the plurality of channels. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method to measure current, voltage, and temperature within a Power over Ethernet (PoE) communication system, the PoE communication system providing power and data communication from a Power Source Equipment (PSE) to a Powered Device (PD), comprising:
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measuring, by a PSE controller implemented as part of the PSE, a current of a powered device (PD) to provide a measured current; measuring, by the PSE controller, a voltage of the PD to provide a measured voltage; measuring, by the PSE controller, a temperature of the current measurement system to provide a measured temperature; and time-division multiplexing, by the PSE controller, the measured current, the measured voltage, and the measured temperature to provide a time-division multiplexed signal including a plurality of channels, the measured current being multiplexed into a first channel from among the plurality of channels, the measured voltage being multiplexed into a second channel from among the plurality of channels, and the measured temperature being multiplexed into a third channel from among the plurality of channels. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification