System, Method and Apparatus for One-Pair Power Over Ethernet in an Automotive Application

• US 20150076901A1
• Filed: 09/08/2014
• Published: 03/19/2015
• Est. Priority Date: 09/11/2013
• Status: Active Grant

• Current Assignee: Avago Technologies International Sales Pte Limited (Broadcom, Inc.)
• Original Assignee: Broadcom Corporation (Broadcom, Inc.)
• Inventors: Panguluri, Sesha Thalpasai, Tran, Minh, Yu, James, Diab, Wael William
• Granted Patent: US 10,112,558 B2
• Time in Patent Office: Days
• US Class Current: 307/10.1
• CPC Class Codes: B60R 16/03 for supply of electrical power to vehicle subsystems or for circuit arrangements for charging batteries H02J7/00

Abstract

System, method and apparatus for one-pair power over Ethernet in an automotive application. In one embodiment, a power sourcing equipment transmits a forward path current to a powered device via a single conductor pair and receives a return path current from the powered device via a chassis of an automotive vehicle.

Claims

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.

2. The method of claim 1, wherein the power sourcing equipment is coupled to a battery of the automotive vehicle, the battery connected to the chassis of the automotive vehicle.

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

4. The method of claim 2, wherein the power sourcing equipment is connected to a positive terminal of the battery.

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

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

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

8. A power sourcing equipment, comprising:

a first port that is configured for coupling to a battery of an automotive vehicle;

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 a powered device via the single conductor pair, a first portion of the 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 a chassis of the automotive vehicle.

9. The power sourcing equipment of claim 8, wherein the battery is connected to the chassis of the automotive vehicle.

10. The power sourcing equipment of claim 9, wherein the battery is a 12V battery.

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

12. The power sourcing equipment of claim 8, wherein the second port is coupled to the single conductor pair via a transformer.

13. The power sourcing equipment of claim 8, wherein the second port is coupled to the single conductor pair via an inductor.

14. The power sourcing equipment of claim 8, wherein the single conductor pair is a single twisted wire pair.

15. A powered device, comprising:

a power transistor that is configured to deliver power to a load, via a single conductor pair, a first portion of the forward path current from a power sourcing equipment carried over a first conductor of the single conductor pair, a second portion of the forward path current from the power sourcing equipment 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.

16. The powered device of claim 15, wherein the powered device is connected to the single conductor pair via a transformer.

17. The powered device of claim 15, wherein the powered device is connected to the single conductor pair via an inductor.

18. The powered device of claim 15, wherein the single conductor pair is a single twisted wire pair.