Low power isolation design for a multiple sourced power bus
AssigneeNellcor Puritan Bennett LLC
InventorDanis E. Carter
Life of this patent
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Abstract
A redundant power supply connected to a common load is provided. Each power supply is connected to the common load through a series of MOSFET pairs. Each MOSFET in a MOSFET pair is individually controlled to reduce power consumption as well as the need for heat sinks on discrete diodes. Moreover, by providing individually controllable MOSFETs the present invention is capable of switching between power supplies without shorting the power supplies or having a significant drop in bus voltage.
Claims24
A system, comprising:
- a first power supply operable to provide power to a load via a first isolation switch comprising at least two switching devices;
- a second power supply operable to provide power to the load via a second isolation switch comprising at least two switching devices;
- and
- a controller operable to independently control each switching device in the first and second isolation switches.
A method, comprising:
- determining that a first power supply connected to a load via a first isolation switch and providing power to the load has a decreasing voltage, wherein the first isolation switch comprises at least two switching devices;
- and
- independently controlling each switching device in the first isolation switch to cause power to be supplied to the load by a second power supply.
A power consuming load operable to receive power from at least one of a first and second power supply, wherein the first and second power supplies are each separately operable to provide power to the load via a pair of switching devices, wherein an operational state of each switching device associated with each power supply is independently controlled by a controller.
Dependencies are inferred from the claim text.