Wireless power receiver and power control method thereof
First Claim
1. A method of supplying power in a wireless power receiver, the method comprising:
- receiving an AC power via a reception coil in the wireless power receiver;
rectifying the AC power to a DC power;
entering a charging mode by transferring the DC power to a load when a voltage of the DC power is equal to or greater than a first threshold voltage;
maintaining the load in the charging mode when the voltage of the DC power is equal to or greater than a second threshold voltage in a state of the charging mode; and
blocking the DC power to the load when the voltage of the DC power transitions from a voltage higher than the second threshold voltage to a lower voltage less than the second threshold voltage,wherein the first threshold voltage is greater than the second threshold voltage.
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Abstract
A method of supplying power in a wireless power receiver, can include receiving an AC power via a reception coil in the wireless power receiver; rectifying the AC power to a DC power; entering a charging mode by transferring the DC power to a load when a voltage of the DC power is equal to or greater than a first threshold voltage; maintaining the load in the charging mode when the voltage of the DC power is equal to or greater than a second threshold voltage in a state of the charging mode; and blocking the DC power to the load when the voltage of the DC power transitions from a voltage higher than the second threshold voltage to a lower voltage less than the second threshold voltage.
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Citations
21 Claims
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1. A method of supplying power in a wireless power receiver, the method comprising:
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receiving an AC power via a reception coil in the wireless power receiver; rectifying the AC power to a DC power; entering a charging mode by transferring the DC power to a load when a voltage of the DC power is equal to or greater than a first threshold voltage; maintaining the load in the charging mode when the voltage of the DC power is equal to or greater than a second threshold voltage in a state of the charging mode; and blocking the DC power to the load when the voltage of the DC power transitions from a voltage higher than the second threshold voltage to a lower voltage less than the second threshold voltage, wherein the first threshold voltage is greater than the second threshold voltage. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A wireless power receiver comprising:
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a reception coil configured to output an AC power; a rectifier configured to rectify the AC power to a DC power; a DC-DC converter configured to adjust the DC power and to transfer the adjusted DC power to a load; and a controller configured to; measure a voltage of the DC power of the rectifier, enter a charging mode by transferring the DC power to the load when a voltage of the DC power is equal to or greater than a first threshold voltage, maintain the load in the charging mode when the voltage of the DC power is equal to or greater than a second threshold voltage in a state of the charging mode, block the DC power to the load when the voltage of the DC power transitions from a voltage higher than the second threshold voltage to a lower voltage less than the second threshold voltage, and block the DC power to the load when the voltage of the DC power exceeds a maximum voltage, wherein the first threshold voltage is greater than the second threshold voltage. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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18. A method of using power in a wireless power receiver, the method comprising:
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receiving an AC power by a reception coil in the wireless power receiver; rectifying, via a rectifying unit in the wireless power receiver, the AC power to a DC power; when a voltage of rectifying unit exceeds a first threshold voltage, entering into a charging mode and begin transferring, via a DC-DC converter, the DC power from an output of the rectifying unit to a load connected to the wireless power receiver; maintaining the load in the charging mode and continuing to supply the DC power from the output of the rectifying unit to the load, via the DC-DC converter, while the voltage in the rectifying unit remains greater than or equal to a second threshold voltage that is less than the first threshold voltage; and when the voltage in the rectifying unit transitions from a voltage higher than the second threshold voltage to a lower voltage that is less than the second threshold voltage, discontinuing the supply of the DC power from the output of the rectifying unit to the load, wherein the voltage in the rectifying unit is based on a voltage of the reception coil, wherein the DC-DC converter is connected between the output of the rectifying unit and an input of the load, and wherein the first threshold voltage is greater than the second threshold voltage. - View Dependent Claims (19, 20, 21)
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Specification