CLOSED LOOP CURRENT CONTROL IN A WIRELESS POWER SYSTEM
First Claim
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1. A wireless power transmitter, comprising:
- a first controller configured to set a target coil current value based, at least in part, on a voltage value reported by a wireless power receiver;
an amplifier configured to generate a transmitter coil current based, at least in part, on a supply voltage received by the amplifier; and
a second controller configured to adjust the supply voltage received by the amplifier based, at least in part, on a comparison of a value of the transmitter coil current to the target coil current value.
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Abstract
Methods and apparatus for providing closed loop current control in a wireless power transmitter. The method comprises adjusting a transmitter coil current generated by the wireless power transmitter based, at least in part, on first feedback reported by at least one wireless power receiver and second feedback based on a measurement of the transmitter coil current.
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Citations
20 Claims
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1. A wireless power transmitter, comprising:
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a first controller configured to set a target coil current value based, at least in part, on a voltage value reported by a wireless power receiver; an amplifier configured to generate a transmitter coil current based, at least in part, on a supply voltage received by the amplifier; and a second controller configured to adjust the supply voltage received by the amplifier based, at least in part, on a comparison of a value of the transmitter coil current to the target coil current value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A wireless charging system, comprising:
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a wireless charging pad including a wireless charging transmitter formed therein; and at least one wireless power receiver configured to be coupled to the wireless charging transmitter when placed on the wireless charging pad; wherein the wireless charging transmitter includes at least one controller configured to adjust a transmitter coil current generated by the wireless charging transmitter based, at least in part, on first feedback reported by the at least one wireless power receiver and second feedback based on a measurement of the transmitter coil current. - View Dependent Claims (13, 14, 15, 16)
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17. A method of providing closed loop current control in a wireless power transmitter, the method comprising:
adjusting a transmitter coil current generated by the wireless power transmitter based, at least in part, on first feedback reported by at least one wireless power receiver and second feedback based on a measurement of the transmitter coil current. - View Dependent Claims (18, 19, 20)
Specification