Automatic power supply selector for ACPI-compliant PCI devices

Electric power conversion systems – Current conversion – With means to connect the input to diverse power sources

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H02M 110

Patent

active

060916176

ABSTRACT:
Apparatus for automatically selecting one of two or more available power supply voltages for use as a main power supply of a PCI adapter is described. In one embodiment, a power supply selector is designed such that the presence of a positive voltage at a Vaux input thereof prevents power at a Vcc input thereof from driving a main power supply input to a PCI adapter. Conversely, the absence of a positive voltage at the Vaux results in the main power supply input to the PCI adapter being derived from the Vcc input. In an alternative embodiment, jumpers are provided for enabling a user to select which power supply will be used as the "default" power supply for the adapter.

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patent: 5508874 (1996-04-01), Williams et al.
patent: 5929539 (1999-07-01), Kozaru et al.
patent: 5973871 (1999-10-01), Dunn et al.

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