Charging unit with two power source inputs
AssigneeNokia Corporation
InventorsTimo Tapani Lundqvist, Jari Tuomo Pistemaa
Life of this patent
Estimating the term…
Abstract
A charging unit comprises a first input connectable to a first power source, a second input connectable to a second power source, and an output for connection to a battery to be charged. The charging unit also comprises a power supply unit operable simultaneously to provide power from the first input and power from the second input to the output.
Claims18
A charging unit comprising:
- a first input connectable to a first power source;
- a second input connectable to a second power source;
- an output, for connection to a battery to be charged;
- and
- a power supply unit operable simultaneously to provide power from the first input and power from the second input to the output.
A charging unit comprising:
- a first input connectable to a first power source;
- a second input connectable to a second power source;
- an output, for connection to a battery to be charged;
- and
- a power supply unit comprising:
- a first switching unit;
- a second switching unit;
- a converter having an input and an output;
- and
- a controller;
- the first switching unit being connected between the first input and the input of the converter, and the second switching unit being connected between the second input and the input of the converter, the output of the converter being connected to the charging unit output, wherein the controller is operable
- simultaneously to provide first and second oscillating control signals to the first and second switching units respectively.
A charging unit comprising:
- a first input connectable to a first power source;
- a second input connectable to a second power source;
- an output, for connection to a battery to be charged;
- and
- a power supply unit comprising:
- a first switching unit;
- a second switching unit;
- a first converter having an input and an output;
- a second converter having an input and an output;
- and
- a controller;
- the first switching unit being connected between the first input and the input of the first converter, and the second switching unit being connected between the second input and the input of the second converter, the output of the first converter and the output of the second converter being commonly connected to the charging unit output, wherein the controller is operable simultaneously to provide first and second oscillating control signals to the first and second switching units respectively.
A charging unit as claimed in any preceding claim, wherein the first input is coupled to USB connector.
A charging unit as claimed in any preceding claim, wherein the second input is coupled to a mains electricity power supply connector.
A portable device comprising a charging unit as claimed in any preceding claim.
A method of operating a charging unit, the charging unit comprising:
- a first input connectable to a first power source;
- a second input connectable to a second power source;
- an output, for connection to a battery to be charged;
- and
- a power supply unit,
- the method comprising:
- controlling the power supply unit simultaneously to provide at the output power from the first input and power from the second input.
Dependencies are inferred from the claim text.