Wireless power receiver and power control method thereof
AssigneeLG Innotek Co., Ltd.
InventorSu Ho BAE
Life of this patent
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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.
Claims20
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.
A wireless power receiver comprising:
- 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:
- enter 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,
- 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, and
- 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.
A method of using power in a wireless power receiver, the method comprising:
- 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, and
- wherein the DC-DC converter is connected between the output of the rectifying unit and an input of the load.
Dependencies are inferred from the claim text.