Cisco Technology, Inc.

Dean Ton Nguyen

Michael Grant

Matt Howard

Matthew Patrick Howard

Presented herein are methodologies for providing power for last gasp operations of a circuit board when power is unexpectedly interrupted. A method includes monitoring a voltage of a main power supply; when the voltage of the main power supply falls below a predetermined threshold, disabling a first point of load (POL) converter that is being powered by the main power supply; boosting a voltage of an output capacitor of the first point of load converter to obtain a boosted voltage; and supplying the boosted voltage to an input of a second point of load converter.

Energy recovery during system shutdown

In one embodiment, a power apparatus, includes at least one first and second power supply to receive power from a main power supply, the at least one first power supply including at least one first input capacitor to smooth voltage ripples, a voltage monitor to monitor voltage provided by the main power supply, and cause enablement and/or disablement of at least one part of the at least one first power supply according to the voltage provided by the main power supply, and at least one first blocking and passing component configured to selectively channel energy from the main power supply to charge the at least one first input capacitor during a time when the at least one part is enabled, and channel energy from the at least one first input capacitor to the at least one second power supply during a time when the at least one part is disabled.

Growing community of inventors

San Jose, CA, United States of America

Dean Ton Nguyen