Power supply distribution system employing non-isolated DC/DC converters

• US 6,317,345 B1
• Filed: 02/19/1999
• Issued: 11/13/2001
• Est. Priority Date: 02/20/1998
• Status: Expired due to Fees

• Current Assignee: Curtiss-Wright Controls Incorporated (Curtiss-Wright Corporation)
• Original Assignee: Hybricon Corp. (Celestica Incorporated)
• Inventors: Sullivan, Robert C., Hayward, C. Michael, Rehlander, Richard N.
• Primary Examiner(s): Wong, Peter S.
• Assistant Examiner(s): Laxton, Gary L.
• Application Number:
  US09/253,332
• Time in Patent Office: 998 Days
• Field of Search: 363/65, 363/69, 363/71, 363/72, 363/67, 307/43, 307/52, 307/53, 307/60, 307/67, 307/82, 307/58, 307/80
• US Class Current: 363/65
• CPC Class Codes: H02J 1/001 Hot plugging or unplugging of load or power modules to or from power distribution networks
• CPC Class Codes: H02M 3/1584 with a plurality of power processing stages connected in parallel
• CPC Class Codes: H05K 7/1457 Power distribution arrangements

Abstract

In a method and apparatus for partitioning and packaging a power generation and distribution system, a plurality of power supply modules are distributed along the length of the backplane such that backplane voltage drops are minimized and such that power supply currents flow essentially orthogonal to the signal connections between the backplane slots. In this manner, signal interference is minimized and the need for bus bars on the backplane are substantially reduced or eliminated.

Claims

1. A power supply module for a backplane comprising:

a plurality of independent voltage converter units distributed in parallel between a voltage input and a voltage output, said voltage converter units maintaining current sharing between multiple units;

the voltage converter units each comprising a non-isolated back-end DC-to-DC converter, wherein the voltage input comprises an intermediate DC power source sharing a common return with the voltage output; and

means for monitoring the status of each voltage converter unit to identify a power supply fault.

2. The power supply module of claim 1 further comprising one or more redundant isolated front end modules for supplying said voltage input to said voltage converter units, wherein the one or more isolated front end modules provides an isolated intermediate voltage power source to said plurality of voltage converter units.

3. The power supply module of claim 1 wherein the plurality of voltage converter units are contained in a single module.

4. A power supply system for a backplane for receiving daughter cards comprising:

an isolated front end for generating an intermediate DC voltage coupled to a system backplane having signal traces between a plurality of daughter card connectors; and

at least one non-isolated back-end voltage converter coupled to said system backplane for convertng said intermediate DC voltage to an output voltage required as a daughter card input voltage by the daughter cards, said at least one back-end voltage converters being configured such that current flow over power traces between the at least one back-end voltage converters and the daughter card connectors is substantially orthogonal to current flow through said signal traces of said system backplane.

5. The system of claim 4 wherein a multiple of said at least one back-end voltage converters are distributed across the system backplane.

6. The system of claim 4 wherein said system backplane comprises a card backplane and a power backplane interconnected such that current flow between the back-end voltage converters and the daughter card connectors is substantially orthogonal to current flow through said signal traces of said system backplane.

7. The system of claim 6 wherein said card backplane and said power backplane comprise a single monolithic backplane.

8. The system of claim 6 wherein said card backplane and said power backplane are separate units.

9. The system of claim 4 comprising a plurality of non-isolated back end voltage converters, and further comprising means for monitoring the status of each voltage converter to identify a fault and means for selectively activating at least one of said voltage converters so as to redundantly supply power to said daughter card connectors.

10. The system of claim 9 wherein the voltage converter units comprise non-isolated back-end DC-to-DC converters.