Integrated powered device connector in system for supplying power over communication link

• US 20070132487A1
• Filed: 11/08/2006
• Published: 06/14/2007
• Est. Priority Date: 12/12/2005
• Status: Active Grant

• Current Assignee: Analog Devices International Unlimited Company (Analog Devices, Inc.)
• Original Assignee: Linear Technology Corporation (Analog Devices, Inc.)
• Inventors: Kestelli, Nevzat
• Granted Patent: US 7,831,844 B2
• Time in Patent Office: Days
• US Class Current: 327/108
• CPC Class Codes: H04L 12/10 Current supply arrangements
• CPC Class Codes: H04L 25/0264 Arrangements for coupling to transmission lines duplexing arrangements H04L5/14; line equalisers, line build-out devices H04L25/03878
• CPC Class Codes: H04L 41/08 Configuration management of networks or network elements address allocation H04L61/50
• CPC Class Codes: H04L 49/40 Constructional details, e.g. power supply, mechanical construction or backplane
• CPC Class Codes: Y02D 30/00 Reducing energy consumption in communication networks
• CPC Class Codes: Y04S 40/00 Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them

Abstract

An integrated connecting device for coupling a communication link to a powered device (PD) in a system for supplying power to the PD over the communication link. The integrated connecting device has a housing configured for providing connection to the PD external with respect to the housing, communication interface circuitry coupled to the communication link for supporting data communication of the PD over the communication link, and power interface circuitry coupled to the communication interface circuitry for implementing a power supply protocol performed to supply power to the PD over the communication link. The communication interface circuitry and the power interface circuitry being held by the housing.

Claims

1. A connecting device for coupling a powered device (PD) to a communication link configured for supplying power to the PD, the connecting device comprising:

a housing configured for providing connection to the PD external with respect to the housing,

communication interface circuitry coupled to the communication link for supporting data communication of the PD over the communication link, and

power interface circuitry coupled to the communication interface circuitry for implementing a power supply protocol carried out to supply power to the PD over the communication link,

the communication interface circuitry and the power interface circuitry being held by the housing.

2. The device of claim 1, wherein the housing is configured for arranging the communication interface circuitry and the power interface circuitry inside the housing.

3. The device of claim 1, wherein the housing is configured for holding at least one element of the communication interface circuitry arranged inside the housing and for holding at least one element of the power interface circuitry arranged outside of the housing.

4. The device of claim 3, further comprising an electronics connector arranged inside the housing for providing connection to said at least one element of the power interface circuitry arranged outside of the housing.

5. The device of claim 1, wherein the communication interface circuitry is configured to support data communication of the PD over an Ethernet link and the power interface circuitry is configured for powering the PD over the Ethernet link.

6. The device of claim 1, wherein the power interface circuitry includes an auxiliary power supply circuit for powering the PD from an auxiliary power source.

7. The device of claim 5, wherein the auxiliary power supply circuit is configured for powering the PD from a wall transformer.

8. The device of claim 1, wherein the power interface circuitry includes a switching regulator for providing regulated output power supplied to the PD.

9. The device of claim 7, wherein the switching regulator includes a DC-to-DC converter.

10. The device of claim 1, wherein the power interface circuitry includes an isolation circuit for providing electrical isolation of the PD from a power supply device that provides power over the communication link.

11. The device of claim 1, wherein the power interface circuitry includes bridge circuitry to enable the PD to accept supplied power of either of two polarities.

12. The device of claim 1, wherein the power interface circuitry includes a signature circuit for providing identification of the PD in accordance with the power supply protocol.

13. The device of claim 1, wherein the power interface circuitry includes a classification circuit for requesting a power level required by the PD in accordance with the power supply protocol.

14. The device of claim 1, wherein the power interface circuitry includes a load isolation circuit for preventing power from being supplied to the PD until a predetermined condition is detected.

15. The device of claim 1 further comprising a communication connector arranged in the housing for coupling the connecting device to the communication link.

16. The device of claim 1 further comprising a load connector arranged in the housing for coupling the connecting device to the PD.

17. A local area network (LAN) comprising:

at least a pair of network nodes,

a network hub,

communication cabling for connecting the network nodes to the network hub to provide data communications, the network hub having a power supply device for providing power to a PD over the communication cabling, and

a LAN connector for coupling the PD to the LAN, the LAN connector including;

a housing configured for providing connection to the PD external with respect to the housing,

communication interface circuitry coupled to the communication cabling for supporting data communication of the PD over the communication cabling, and

power interface circuitry coupled to the communication interface circuitry for providing power to the PD over the communication cabling,

the communication interface circuitry and the power interface circuitry being attached to the housing.

18. The device of claim 17, wherein all elements of the communication interface circuitry and the power interface circuitry are arranged inside the housing.

19. The device of claim 17, wherein at least one element of the communication interface circuitry is provided inside the housing and at least one element of the power interface circuitry is attached to the housing and arranged outside of the housing.

20. A power over Ethernet (PoE) system comprising:

a PD configured for being powered over an Ethernet link, and

a PD connector for connecting the PD to the Ethernet link, the PD connector comprising;

a housing configured for providing connection to the PD external with respect to the housing,

communication interface circuitry coupled to the Ethernet link for supporting data communication of the PD over the Ethernet link, and

power interface circuitry coupled to the communication interface circuitry for implementing a PoE power supply protocol,

the communication interface circuitry and the power interface circuitry being accommodated by the housing.

21. The device of claim 20, wherein the housing is configured for placing the communication interface circuitry and the power interface circuitry inside the housing.

22. The device of claim 20, wherein the housing is configured for holding at least one element of the communication interface circuitry arranged inside the housing and at least one element of the power interface circuitry arranged outside of the housing.