Coreless superthin PCB transformer and non-contact battery charger using the same
First Claim
1. A printed circuit board (PCB) transformer for use in a battery charger for charging a portable electronic device, comprising:
- a first PCB having a first winding; and
a second PCB having a second winding and being distanced in a plane parallel from the first PCB in a vertical direction, such that the first PCB does not contact the second PCB.
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Accused Products
Abstract
A super-thin PCB (Printed Circuit Board) transformer is manufactured by installing windings on a common PCB without using a magnetic core. A non-contact battery charger using the PCB transformer includes a converter for converting a supply voltage into a high frequency square wave and then applying the converted square wave into a first winding of the PCB transformer; and a charger for converting an electromotive force to a DC voltage to apply the converted DC voltage to a charge circuit, the electromotive force being induced to a second winding of the PCB transformer by a magnetic wave which is generated by the square wave induced in the first winding of the PCB transformer. The non-contact battery charger can be applied to portable information communication and calculation devices such as a mobile telephone, a PDA (Personal Digital Assistant Device), a palm-top, an interetphone, etc.
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Citations
23 Claims
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1. A printed circuit board (PCB) transformer for use in a battery charger for charging a portable electronic device, comprising:
- a first PCB having a first winding; and
a second PCB having a second winding and being distanced in a plane parallel from the first PCB in a vertical direction, such that the first PCB does not contact the second PCB. - View Dependent Claims (2, 3, 4)
- a first PCB having a first winding; and
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5. A non-contact battery charger comprising:
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a PCB transformer having a first PCB including a first winding thereon, and a second PCB having a second winding thereon;
a converter including the first PCB is converting a supply voltage into a high frequency square wave and then applying the converted square wave to the first winding of the first PCB of the PCB transformer; and
a charger having a charge circuit for converting an input voltage to a lower voltage and supplying the converted voltage to a battery and the second PCB of the PCB transformer, wherein the charger converts an electromotive force to a DC voltage to apply the converted DC voltage to said charge circuit, the electromotive force being induced in the second winding of the second PCB of the PCB transformer by a magnetic wave which is generated by the square wave induced in the first winding of the first PCB of the PCB transformer. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A non-contact battery charger comprising:
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a PCB transformer including a first side having a first winding extending radially from a center of the first side of the PCB transformer;
a first rectifier circuit for converting a power voltage to be applied into a DC voltage, and an inverter for converting the DC voltage into a square wave to apply the converted square wave to the first side of the PCB transformer;
a charger having a second side of the PCB transformer, the second side having a second winding extending radially from a center of the second side of the PCB transformer, the first side being spaced parallel from the second side of the PCB transformer a certain distance in a vertical direction; and
a second rectifier circuit for converting an electromotive force to a DC voltage to apply the converted DC voltage to a charge circuit, the electromotive force being induced to a winding in the second side of the PCB transformer by a magnetic wave which is generated by the square wave induced to the first side of the PCB transformer, the charger further having a charge circuit for converting an input voltage from the second rectifier circuit to a lower voltage to supply the converted input voltage to a battery.
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Specification