Charger Communication by Load Modulation
First Claim
Patent Images
1. A charger port comprising:
- an AC to DC power converter configured for converting an AC voltage to an output dc voltage and current and providing the output dc voltage and current to a portable device that is connected to the charger port;
a charger power controller comprising;
a load sensing circuit configured for sensing changes in the output current of the AC to DC power converter to determine changes in the load current of the portable device and generating a load current data signal;
a data sensing circuit is configured for receiving the load current data signal and for detecting a valid data signal from the load sensing circuit;
a data decode circuit configured for receiving the valid data signal for interpreting data commands in the valid data signals indicating voltage and current levels to be generated by the AC to DC power converter.
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Abstract
A method and circuit that allows a charger port to source a slow charging voltage and current for one type of portable device and an adjustable voltage and current for a second type of portable device. The second type of portable device communicates with the charger port to establish a voltage and current that the portable device is capable of accepting. The portable device communicates with a charger port by load modulation structured for establishing a communications protocol for communicating a voltage and current level acceptable to the portable device.
110 Citations
30 Claims
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1. A charger port comprising:
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an AC to DC power converter configured for converting an AC voltage to an output dc voltage and current and providing the output dc voltage and current to a portable device that is connected to the charger port; a charger power controller comprising; a load sensing circuit configured for sensing changes in the output current of the AC to DC power converter to determine changes in the load current of the portable device and generating a load current data signal; a data sensing circuit is configured for receiving the load current data signal and for detecting a valid data signal from the load sensing circuit; a data decode circuit configured for receiving the valid data signal for interpreting data commands in the valid data signals indicating voltage and current levels to be generated by the AC to DC power converter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 10, 12)
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9. A portable device comprising:
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a power converter configured for converting a voltage and a load current provided by a charger port to a voltage required by the portable device for operation and for charging a battery; a load switching circuit configured for receiving a control signal that is constructed for modulating the load current for transmission of digital data signals to the charger port; a power control circuit configured for generating the control signal for driving the switched load circuit to activate and deactivate the switched load circuit for modulating the load current for transferring the digital data signals to the port charger. - View Dependent Claims (11, 13)
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14. An electronic apparatus comprising:
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a charger port comprising; an AC to DC power converter configured for converting an AC voltage to an output dc voltage and current and providing the output dc voltage and current to an output receptacle; a charger power controller comprising; a load sensing circuit configured for sensing changes in the output current of the AC to DC power converter to determine changes in load current present at the output receptacle; a data sensing circuit is configured for receiving the load current data signal and for detecting a valid data signal from the load sensing circuit; a data decode circuit configured for receiving the valid data signal for interpreting data commands in the valid data signals indicating voltage and current levels to be generated by the AC to DC power; and a portable device comprising; a power converter configured for receiving and converting the output voltage and current provided by a charger port through the receptacle to a voltage required by the portable device for operation and for charging a battery, a load switching circuit configured for receiving a control signal that is constructed for modulating the load current for transmission of digital data signals to the charger port, and a power control circuit configured for generating the control signal for driving the switched load circuit to activate and deactivate the switched load circuit for modulating the load current for transferring the digital data signals to the port charger. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. A method for rapidly charging a battery within a portable device comprising the steps of:
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plugging the portable device into an external supply or charger port; sourcing an slow charging voltage and current to the portable device from the charger port sensing by the charger port an output current from the charger port; detecting any load change in the output current indicating a load modulating signal; when there is a load change in the output current indicating a load modulating signal, evaluating the load modulating signal to determine if the load modulating signal is valid data; when the load modulating signal is valid data, accumulating data determined to be valid data; decoding the accumulated valid data to determine a fast charging voltage and current required by the portable device for fast charging the battery; and setting the fast charging voltage and current for the portable device the by external supply. - View Dependent Claims (27, 28, 29, 30)
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Specification