System, method and apparatus for one-pair power over ethernet in an automotive application

1. A method, comprising:

transmitting, by a power sourcing equipment, a forward path current to a powered device via a single conductor pair, a first portion of the forward path current carried over a first conductor of the single conductor pair and a second portion of the forward path current carried over a second conductor of the single conductor pair, and a return path current from the powered device to the power sourcing equipment carried by a chassis of an automotive vehicle,

wherein the power sourcing equipment is coupled to a battery of the automotive vehicle, the battery connected to the chassis of the automotive vehicle, and the chassis connected to the powered device, and

wherein a difference between a resistance of the chassis and a resistance of the single conductor pair provides a predetermined power loss attributable to a predetermined length of the single conductor pair.

2. The method of claim 1 , wherein the battery is a 12V battery.

3. The method of claim 1 , wherein the power sourcing equipment is connected to a positive terminal of the battery.

4. The method of claim 1 , wherein the power sourcing equipment is connected to the single conductor pair via a transformer.

5. The method of claim 1 , wherein the power sourcing equipment is connected to the single conductor pair via an inductor.

6. The method of claim 1 , wherein the single conductor pair is a single twisted wire pair.

7. A power sourcing equipment, comprising:

a first port that is configured for coupling to a battery of an automotive vehicle, wherein the battery is connected to a chassis of the automotive vehicle, and the chassis is connected to a powered device;

a second port that is configured for coupling to a single conductor pair; and

control logic that is configured to control a delivery of power to the powered device via the single conductor pair, a first portion of a forward path current carried over a first conductor of the single conductor pair, a second portion of the forward path current carried over a second conductor of the single conductor pair, and a return path current from the powered device to the power sourcing equipment carried by the chassis of the automotive vehicle,

wherein a difference between a resistance of the chassis and a resistance of the single conductor pair provides a predetermined power loss attributable to a predetermined length of the single conductor pair.

8. The power sourcing equipment of claim 7 , wherein the battery is a 12V battery.

9. The power sourcing equipment of claim 7 , wherein the first port of the power sourcing equipment is coupled to a positive terminal of the battery.

10. The power sourcing equipment of claim 7 , wherein the second port is coupled to the single conductor pair via a transformer.

11. The power sourcing equipment of claim 7 , wherein the second port is coupled to the single conductor pair via an inductor.

12. The power sourcing equipment of claim 7 , wherein the single conductor pair is a single twisted wire pair.

13. A method, comprising:

coupling a first port of a power sourcing equipment to a battery of an automotive vehicle, wherein the battery is connected to a chassis of the automotive vehicle, and the chassis is connected to a powered device;

coupling a second port of the power sourcing equipment to a single conductor pair; and

controlling a delivery of power from the power sourcing equipment to the powered device via the single conductor pair, a first portion of a forward path current carried over a first conductor of the single conductor pair, a second portion of the forward path current carried over a second conductor of the single conductor pair, and a return path current from the powered device to the power sourcing equipment carried by the chassis of the automotive vehicle,

wherein a difference between a resistance of the chassis and a resistance of the single conductor pair provides a predetermined power loss attributable to a predetermined length of the single conductor pair.

14. The method of claim 13 , wherein the first port is coupled to a positive terminal of the battery.

15. The method of claim 13 , wherein the second port is coupled to the single conductor pair via a transformer.

16. The method of claim 13 , wherein the second port is coupled to the single conductor pair via an inductor.

17. The method of claim 13 , wherein the single conductor pair is a single twisted wire pair.