Higher efficiency, longer holdup time dc input front end power supply
AssigneeCisco Technology, Inc.
InventorsXiqun Zhu, Alpesh Umakant Bhobe
Life of this patent
Estimating the term…
Abstract
A power supply device is provided that an input current circuit and an energy holdup circuit. The input current circuit comprises an input for receiving input power, and an output for providing power to a powered device. The energy holdup circuit is connected to the input current circuit and includes one or more capacitors for storing energy. The energy holdup circuit is configured to couple energy stored in the one or more capacitors to the output when there is a loss of the input power, and to not direct current through the one or more capacitors when the input receives the input power.
Claims20
A power supply device comprising:
- an input current circuit comprising:
- an input for receiving input power, and
- an output for providing power to a powered device;
- and
- an energy holdup circuit connected to the input current circuit, the energy holdup circuit including one or more capacitors for storing energy, wherein the energy holdup circuit is configured to couple energy stored in the one or more capacitors to the output when there is a loss of the input power, and to not direct current through the one or more capacitors when the input receives the input power.
A method comprising:
- receiving, at an input of an input current circuit of a power supply unit, input power;
- providing, by an output of the input current circuit, power to a powered device;
- and
- transmitting, by an energy holdup circuit connected to the input current circuit, energy stored in one or more capacitors of the energy holdup circuit to the output when there is a loss of the input power, wherein current does not flow through the one or more capacitors when the input receives the input power.
A device comprising:
- an energy holdup circuit connected to an input current circuit, the energy holdup circuit including:
- one or more capacitors configured to store energy, wherein current does not flow through the one or more capacitors when the input current circuit receives input power, and
- an isolated direct current (DC)-to-DC converter configured to couple the energy stored in the one or more capacitors to an output of the input current circuit when there is a loss of the input power.
Dependencies are inferred from the claim text.