Charging control device, charging control method and wireless power receiving device equipped with same
First Claim
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1. A wireless power receiver for transferring a power received from a wireless power transmitter to a load, the wireless power receiver comprising:
- a receiving coil for receiving an AC power from the wireless power transmitter;
a rectifier for rectifying the AC power into a DC voltage;
a capacitor charged with the rectified DC voltage;
a comparator that compares a voltage of the capacitor with a reference voltage and generates an output signal based on the comparison result;
a switch connected between the rectifier and the capacitor and switched based on the output signal of the comparator to control a supply of the DC voltage to the load;
a signal detector for detecting a signal from the rectifier;
a controller for recognizing a state of the load based on the signal detected by the signal detector; and
a modulator disposed between the receiving coil and the rectifier and modulated according to a control signal of the controller,wherein information is supplied from the receiving coil to a transmitting coil of the wireless power transmitter by modulation of the modulator.
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Abstract
A charging control device includes a capacitor, a comparison unit and a switching unit. The capacitor is charged with a voltage converted from power received from a wireless power sending device. The comparison unit compares the voltage of the capacitor with a reference voltage, and generates an output signal according to the result of the comparison. The switching unit is connected to the front end of the capacitor and is switched by the output signal from the comparison unit so as to control whether to supply the converted voltage to a load terminal.
13 Citations
5 Claims
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1. A wireless power receiver for transferring a power received from a wireless power transmitter to a load, the wireless power receiver comprising:
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a receiving coil for receiving an AC power from the wireless power transmitter; a rectifier for rectifying the AC power into a DC voltage; a capacitor charged with the rectified DC voltage; a comparator that compares a voltage of the capacitor with a reference voltage and generates an output signal based on the comparison result; a switch connected between the rectifier and the capacitor and switched based on the output signal of the comparator to control a supply of the DC voltage to the load; a signal detector for detecting a signal from the rectifier; a controller for recognizing a state of the load based on the signal detected by the signal detector; and a modulator disposed between the receiving coil and the rectifier and modulated according to a control signal of the controller, wherein information is supplied from the receiving coil to a transmitting coil of the wireless power transmitter by modulation of the modulator. - View Dependent Claims (2)
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3. A wireless power receiver for transferring a power received from a wireless power transmitter to a load, the wireless power receiver comprising:
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a receiving coil for receiving an AC power from the wireless power transmitter; a rectifier for rectifying the AC power into a DC voltage; a capacitor charged with the rectified DC voltage; a controller that compares a voltage of the capacitor with a reference voltage and generates a first control signal based on the comparison result; a switch connected between the rectifier and the capacitor and switched based on the first control signal of the controller to control a supply of the DC voltage to the load; a signal detector for detecting a signal from the rectifier, wherein the controller recognizes a state of the load based on the signal detected by the signal detector; and a modulator disposed between the receiving coil and the rectifier and modulated according to a second control signal from the controller, wherein information is supplied from the receiving coil to a transmitting coil of the wireless power transmitter by modulation of the modulator. - View Dependent Claims (4, 5)
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Specification