Dell Products Inc.

Chung-Fu Lai

Shih-Chieh Wang

Tsai-Fu Hung

Yung Fa Chueh

Po-Yun Shih

Yi-Chiao Hsu

A PSU including a primary side, including: a buck capacitor; and a PFC in electrical communication with the buck capacitor; a secondary side, including: a super capacitor; and a converter in electrical communication with an output of the primary side and in electrical communication with the super capacitor, wherein in a first state, the PFC receives energy from a source of energy, and in response: provides the energy to i) charge the buck capacitor based on a SOC of the buck capacitor, ii) charge the super capacitor based on a second SOC of the super capacitor; and iii) an IHS coupled to the PSU, wherein in a second state, the PFC ceases to receive energy from the source of energy and in response: the buck capacitor discharges to provide energy to the IHS; after the buck capacitor is completely discharged, the super capacitor discharges to provide energy to the IHS.

Extending hold-up time of a power supply unit

Active droop current sharing among power supply units may regulate output currents of power supply units supplying shared current to a common load. The regulation may employ a combination of droop control and active current control. The shared current may be regulated such that each power supply unit provides a substantially equal share of the total current supplied. A current difference between two power supplies may be regulated to be within a desired maximum threshold for current difference.

Active droop current sharing among power supply units

Methods and systems for power supply unit (PSU) current sharing may include an In-System Power Monitoring and Management (IPMM) module monitoring an output value of a first power supply unit in a multi-power supply system. In an embodiment, the IPMM module may monitor an output value of a second power supply unit in the multi-power supply system. Additionally, the IPMM module may monitor an output performance parameter for the multi-power supply system. Furthermore, the IPMM module may adjust a setting of at least one of the first power supply unit and the second power supply unit for optimization of a current sharing performance parameter of the multi-power supply system. In various embodiments, the setting may include a droop voltage value, a distribution impedance value, or a set voltage increment value of at least one of the first power supply unit and the second power supply unit.

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Sanchong, Taiwan

Chung-Fu Lai