Apparatus and method for wireless power reception
First Claim
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1. A synchronous rectifier comprising:
- a first switching unit;
a second switching unit;
a third switching unit;
a fourth switching unit;
a DC/DC converter; and
a rectifier controller configured to;
delay, via a first control signal outputted to the first switching unit, a closing of the first switching unit until an opening of the third switching unit, anddelay, via a second control signal outputted to the second switching unit, a closing of the second switching unit until an opening of the fourth switching unit,wherein the synchronous rectifier is configured to rectify an alternating current (AC) input power via a first input terminal and a second input terminal,wherein, in response to a voltage of the first input terminal being greater than a voltage of the second input terminal, the second switching unit and the third switching unit are closed, the first switching unit and the fourth switching unit are opened, and a current of the AC input power is supplied to an output terminal of the synchronous rectifier via the closed second switching unit and the closed third switching unit,wherein, in response to the voltage of the second input terminal being greater than the voltage of the first input terminal, the first switching unit and the fourth switching unit are closed, the second switching unit and the third switching unit are opened, and a current of the AC input power is supplied to the output terminal via the closed first switching unit and the closed fourth switching unit,a fifth switching unit connected between the third input terminal and a second output terminal of the DC/DC converter; and
a sixth switching unit connected between the second output terminal and a ground, andwherein the DC/DC controller is configured to convert the DC level of the rectified AC input power by closing and opening the fifth switching unit and the sixth switching unit in an alternating manner so that when one of the fifth switching unit and the sixth switching unit is closed, another one of the fifth switching unit and the sixth switching unit is open.
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Abstract
An apparatus and a method for wireless power reception include converting a received wireless power to a wireless power for charging using a synchronous rectifier and a direct current/direct current (DC/DC) converter having a structure providing a high efficiency and low heat generation even when a high charging current is supplied.
17 Citations
22 Claims
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1. A synchronous rectifier comprising:
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a first switching unit; a second switching unit; a third switching unit; a fourth switching unit; a DC/DC converter; and a rectifier controller configured to; delay, via a first control signal outputted to the first switching unit, a closing of the first switching unit until an opening of the third switching unit, and delay, via a second control signal outputted to the second switching unit, a closing of the second switching unit until an opening of the fourth switching unit, wherein the synchronous rectifier is configured to rectify an alternating current (AC) input power via a first input terminal and a second input terminal, wherein, in response to a voltage of the first input terminal being greater than a voltage of the second input terminal, the second switching unit and the third switching unit are closed, the first switching unit and the fourth switching unit are opened, and a current of the AC input power is supplied to an output terminal of the synchronous rectifier via the closed second switching unit and the closed third switching unit, wherein, in response to the voltage of the second input terminal being greater than the voltage of the first input terminal, the first switching unit and the fourth switching unit are closed, the second switching unit and the third switching unit are opened, and a current of the AC input power is supplied to the output terminal via the closed first switching unit and the closed fourth switching unit, a fifth switching unit connected between the third input terminal and a second output terminal of the DC/DC converter; and a sixth switching unit connected between the second output terminal and a ground, and wherein the DC/DC controller is configured to convert the DC level of the rectified AC input power by closing and opening the fifth switching unit and the sixth switching unit in an alternating manner so that when one of the fifth switching unit and the sixth switching unit is closed, another one of the fifth switching unit and the sixth switching unit is open. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An apparatus for supplying a power, the apparatus comprising:
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a synchronous rectifier configured to rectify an alternating current (AC) input power to generate a direct current (DC) power, and comprising a first switching unit, a second switching unit, a third switching unit, and a fourth switching unit, wherein the first through fourth switching units comprise discrete power transistors; a DC/DC converter configured to convert a DC level of the DC power; and an integrated circuit comprising; a rectifier controller comprising a first comparator and a second comparator, and configured to perform a delay compensation on a first control signal to be outputted to the first switching unit, and perform a delay compensation on a second control signal to be outputted to the second switching unit, and a DC/DC controller configured to convert the DC level of the rectified AC input power, wherein the synchronous rectifier is further configured to receive the AC input power via a first input terminal of the synchronous rectifier and a second input terminal of the synchronous rectifier, wherein, in response to a voltage of the first input terminal being greater than a voltage of the second input terminal, the second switching unit and the third switching unit are closed, the first switching unit and the fourth switching unit are opened, and a current of the AC input power is supplied to a first output terminal of the synchronous rectifier via the closed second switching unit and the closed third switching unit, wherein, in response to the voltage of the second input terminal being greater than the voltage of the first input terminal, the first switching unit and the fourth switching unit are closed, the second switching unit and the third switching unit are opened, and a current of the AC input power is supplied to the first output terminal via the closed first switching unit and the closed fourth switching unit, wherein the first output terminal is connected to a third input terminal of the DC/DC converter, a fifth switching unit connected between the third input terminal and a second output terminal of the DC/DC converter; and a sixth switching unit connected between the second output terminal and a ground, and wherein the DC/DC controller is configured to convert the DC level of the rectified AC input power by closing and opening the fifth switching unit and the sixth switching unit in an alternating manner so that when one of the fifth switching unit and the sixth switching unit is closed, another one of the fifth switching unit and the sixth switching unit is open. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A method of supplying a power, the method comprising:
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rectifying, by a synchronous rectifier, an alternating current (AC) input power to generate a direct current (DC) power, wherein the synchronous rectifier comprises; a first switching unit, a second switching unit, a third switching unit, and a fourth switching unit; converting, by a DC/DC converter, a DC level of the DC power; delaying, via a first control signal outputted to the first switching unit, a closing of the first switching unit until an opening of the third switching unit; and delaying, via a second control signal outputted to the second switching unit, a closing of the second switching unit until an opening of the fourth switching unit, wherein the rectifying comprises; receiving the AC input power via a first input terminal of the synchronous rectifier and a second input terminal of the synchronous rectifier; in response to a voltage of the first input terminal being greater than a voltage of the second input terminal, closing the second switching unit and the third switching unit, opening the first switching unit and the fourth switching unit, supplying a current of the AC input power to a first output terminal of the synchronous rectifier via the closed second switching unit and the closed third switching unit; in response to the voltage of the second input terminal being greater than the voltage of the first input terminal, closing the first switching unit and the fourth switching unit, opening the second switching unit and the third switching unit, and supplying a current of the AC input power is supplied to the first output terminal via the closed first switching unit and the closed fourth switching unit, wherein the first output terminal is connected to a third input terminal of the DC/DC converter, a fifth switching unit connected between the third input terminal and a second output terminal of the DC/DC converter; and a sixth switching unit connected between the second output terminal and a ground, and wherein the DC/DC controller is configured to convert the DC level of the rectified AC input power by closing and opening the fifth switching unit and the sixth switching unit in an alternating manner so that when one of the fifth switching unit and the sixth switching unit is closed, another one of the fifth switching unit and the sixth switching unit is open.
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20. An apparatus for supplying a power, the apparatus comprising:
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a synchronous rectifier comprising first through fourth switching elements; a DC/DC converter comprising other switching elements, wherein the switching elements of the DC/DC converter comprise discrete power transistors; and an integrated circuit comprising; a rectifier controller comprising a first comparator and a second comparator, and configured to control the switching elements of the synchronous rectifier in an alternating manner, via delay-compensated control signals, to rectify an alternating current (AC) power to generate a direct current (DC) power, and a DC/DC controller configured to control the switching elements of the DC/DC converter in an alternating manner to adjust a DC level of the DC power generated by the synchronous rectifier and output the DC power having the adjusted DC level, wherein the rectifier controller and the DC/DC controller are fabricated together on a single chip, and wherein the switching elements of the synchronous rectifier and the switching elements of the DC/DC converter are fabricated as discrete off-chip switching elements, wherein the DC/DC converter comprises; a fifth switching unit connected between the third input terminal and a second output terminal of the DC/DC converter; and a sixth switching unit connected between the second output terminal and a ground, and wherein the DC/DC controller is configured to convert the DC level of the rectified AC input power by closing and opening the fifth switching unit and the sixth switching unit in an alternating manner so that when one of the fifth switching unit and the sixth switching unit is closed, another one of the fifth switching unit and the sixth switching unit is open. - View Dependent Claims (21, 22)
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Specification