Patent ID: 8446044
Filing Date: 2013-05-21
Classification: H05K

Abstract:
1. A system, comprising: an electronic equipment rack; a first circuit breaker mounted to the rack and configured to receive a first rack AC power feed; a first AC-DC converter module mounted to the rack and configured to receive the first rack AC power feed from the first circuit breaker and to convert it to a first DC voltage at a first output; plural electronic system modules mounted in the rack; a first set of switching DC-DC output converters, each disposed physically proximate to or within one of the electronic system modules and configured to convert the first DC voltage to a second DC voltage suitable for consumption by the proximate electronic system module; a first bus configured to distribute the first DC voltage from the first output to each of the switching DC-DC output converters in the first set; and a battery backup system configured to receive charging power from the first AC-DC converter module and comprising a switching system configured to detect current flow through a plurality of diodes based on a reduction of voltage on the first bus resulting from one of a failure in the first rack AC power feed and a failure in the first AC-DC converter module, the switching system coupling a battery to the bus via a respective plurality of switches in response to the detected current flow to maintain the first bus at approximately the first DC voltage.