BATTERY BACKUP ARRANGEMENT
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United States of America Patent
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app pub date -
Nov 23, 2015
filing date -
Nov 24, 2014
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Abstract
A module includes a rectifier coupled to an input connector for rectifying an input alternating current (AC), mains supply voltage for a power supply regulator. The passive rectifier applies an input filtered direct current (DC) boosted supply voltage to the power supply regulator, when the filtered DC boosted supply voltage is selectively developed at the input connector. A first sensor senses when the filtered DC boosted supply voltage is selectively developed at the input connector. A switch reduces current loading at the input connector, when the filtered DC boosted supply voltage is developed at the input connector, but not when any of the AC mains supply voltage. An add-on power supply module includes a backup battery for developing the filtered DC boosted supply voltage, in substitution for the unfiltered rectified output supply voltage, when the AC mains supply voltage is unavailable.
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