Patent ID: 8039989
Filing Date: 2011-10-18
Classification: H02J

Abstract:
1. A power supply for regulating voltage, the apparatus comprising: a primary stage of a power supply that regulates voltage on an internal bus at a controlled output voltage, the primary stage comprising a switching power supply that receives power from a power source, the primary stage maintaining the controlled output voltage on the internal bus over a range of input voltages from the power source; a first regulator stage of the power supply connected to the internal bus to receive input power from the primary stage wherein the first regulator stage regulates voltage on a bus configured to connect to a first system; a second regulator stage of the power supply connected to the internal bus to receive input power from the primary stage wherein the second regulator stage regulates voltage on a bus configured to connect to a second system, wherein the first regulator stage continues to operate in the event the second regulator stage is not operating and the second regulator stage continues to operate in the event the first regulator stage is not operating; a first disconnecting means connected between an output of the primary stage and an input of the first regulator stage for isolating the first regulator stage from the second regulator stage and isolating the first regulator stage from the primary stage in response to a failure of the first regulator stage; and a second disconnecting means connected between the output of the primary stage and an input of the second regulator stage for isolating the second regulator stage from the first regulator stage and isolating the second regulator stage from the primary stage in response to a failure of the second regulator stage.