Power supply unit having an extended hold-up time
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United States of America Patent
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Jul 2, 2019
Grant Date -
Nov 16, 2017
app pub date -
May 13, 2016
filing date -
May 13, 2016
priority date (Note) -
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status (Latency Note)
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Abstract
A power supply for an information handling system includes a rectifier circuit that is coupled to a power factor correction circuit. The power factor correction circuit includes a bulk capacitor. An extended hold-up capacitor is coupled in parallel to the bulk capacitor, via an electronic switch. The electronic switch has a first terminal coupled to the bulk capacitor and a second terminal coupled to the extended hold-up capacitor. A control circuit is coupled to a third terminal of the electronic switch and controls the operation of the electronic switch. An extended hold-up circuit is coupled to the extended hold-up capacitor and an output terminal of the power factor correction circuit. A digital signal controller is coupled to the extended hold-up circuit. The digital signal controller controls the operation of the extended hold-up circuit, and a DC to DC converter is coupled to the extended hold-up circuit.
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