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Apparatus and Method for Providing Smooth Power-On Operation with Power Assist Unit

  • US 20200133363A1
  • Filed: 10/30/2018
  • Published: 04/30/2020
  • Est. Priority Date: 10/30/2018
  • Status: Active Grant
First Claim
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1. An information handling system, comprising:

  • a first power supply unit configured to provide power to a power rail to power a load of the information handling system, wherein the first power supply unit operates as an active power supply unit to power the load at all times;

    a second power supply unit configured to provide power to the power rail, wherein the second power supply unit operates as a first stand-by power supply unit, such that when a current demanded by the load is below a first proportion of a maximum current demand, the second power supply unit is off and does not supply any current to the load, and when the current demanded by the load is greater than the first proportion of the maximum current demand, the second power supply unit is on and supplies current to the load; and

    a power assist unit coupled to the power rail, the power assist unit including;

    a power storage element;

    a converter coupled to the power storage element and to the power rail; and

    a controller configured to receive a current level indication that indicates the current demanded by the load, and in response to the current level indication indicating that the current demanded by the load peaks to greater than the first proportion of the maximum current demand, to direct the converter to provide power from the power storage element to the power rail to prevent the second power supply unit from turning on.

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