Power transfer and voltage level conversion for a battery-powered electronic device
AssigneeEricsson Inc.
InventorsJohn J. Hayes, David R. Irvin
Life of this patent
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Abstract
A power supply device and system for providing power to a portable electronic device. A detachable device includes a rechargeable DC power source, a DC-to-AC inverter, and a primary transformer winding around a first core element. The portable electronic device includes multiple secondary transformer windings around a second core element. The detachable device cooperates with the portable electronic device so as to form a complete power supply circuit for providing AC and/or DC operating voltages to the portable electronic device.
Claims21
A power supply for a portable electronic device, comprising:
- a power source which includes a DC power supply for providing a DC voltage, wherein the DC power supply includes one or more rechargeable DC batteries;
- and
- a first transformer portion having a primary transformer winding around a first core element,
- wherein the power supply cooperates with the portable electronic device, the portable electronic device including a second transformer portion having one or more secondary windings around a second core element, such that the first transformer portion and the second transformer portion form a complete transformer to transfer power between the power supply and the portable electronic device.
A power supply circuit for a portable electronic device, comprising:
- a second transformer portion including a second core element and one or more secondary windings around the core element;
- and
- one or more voltage supply means, each voltage supply means associated with one of the one or more secondary windings, for providing one or more supply voltages,
- wherein the second transformer portion cooperates with a DC power supply including a first transformer portion having a first core element and a primary winding so as to form a complete transformer for transferring power between the DC power supply and the portable electronic devices,
- wherein the DC power supply includes one or more rechargeable DC batteries.
A power supply system, comprising:
- a power supply device including a DC power source for supplying a DC voltage, and a first transformer portion having a primary transformer winding around a first core element, wherein the DC power source includes one or more rechargeable DC batteries;
- and
- an electronic device including a second transformer portion having one or more secondary transformer windings around a second core element, the electronic device receiving the power supply device such that the first and second transformer portions cooperate to form a complete power supply circuit.
Dependencies are inferred from the claim text.