Patent ID: 8970064
Filing Date: 2015-03-03
Classification: H02J

Abstract:
1. A direct current backup power supply device for a data processing system with at least one computer supplied with very low voltage whose direct current power supply is adapted for connection to an alternating current supply system using an AC/DC converter of alternating current into direct current, which includes means for storing electrical energy, wherein the direct current backup power supply device comprises: means for charging said means for storing electrical energy received from a part of the direct current supplied by the AC/DC converter to the very low voltage power supply of the data processing system; and means for discharging the electrical energy stored in the means for storing electrical energy to the very low voltage power supply of the data processing system at a noticeably constant predetermined very low voltage following the detection of a micro-cut of the alternating current supply system, wherein the means for discharging comprises a controller configured to detect a voltage drop of the direct current provided by the AC/DC converter and a switch controlled by the controller, and wherein the controller comprises control logic constructed to control successive closing and opening operation of the switch during one and a same discharge cycle of the means for storing electrical energy, according to a predetermined minimum discharge threshold voltage and a predetermined maximum discharge threshold voltage.