Wireless power transmitting/receiving devices and methods
First Claim
Patent Images
1. A wireless power transmitting/receiving device, comprising:
- a power transmitting/receiving element;
a plurality of switches, each of the plurality of switches having a control terminal and a conduction terminal, the conduction terminal being coupled to the power transmitting/receiving element;
a current sensor configured to sense a current through the power transmitting/receiving element;
a controller coupled to the current sensor and the plurality of switches, the controller being configured to control the plurality of switches based on the sensed current; and
a plurality of switch driver circuits, each of the switch driver circuits configured to selectively drive a respective switch in a first mode and a second mode, wherein the switch driver circuits drive the switches based on control signals received from the controller in the first mode, and the switch driver circuits drive the switches as a sync rectifier in the second mode,wherein each of the plurality of switch driver circuits includes;
a digital multiplexer having a first input configured to receive the control signals from the controller for driving the switch in the first mode, and a second input configured to receive second control signals for driving the switch in the second mode; and
a switch driver having an input and an output, the input being coupled to an output of the digital multiplexer.
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Abstract
A wireless power transmitting/receiving device includes a power transmitting/receiving element, a plurality of switches, a current sensor and a controller. Each of the plurality of switches has a control terminal and a conduction terminal, with the conduction terminal being coupled to the power transmitting/receiving element. The current sensor senses a current through the power transmitting/receiving element, and the controller is configured to control the plurality of switches based on the sensed current.
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Citations
25 Claims
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1. A wireless power transmitting/receiving device, comprising:
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a power transmitting/receiving element; a plurality of switches, each of the plurality of switches having a control terminal and a conduction terminal, the conduction terminal being coupled to the power transmitting/receiving element; a current sensor configured to sense a current through the power transmitting/receiving element; a controller coupled to the current sensor and the plurality of switches, the controller being configured to control the plurality of switches based on the sensed current; and a plurality of switch driver circuits, each of the switch driver circuits configured to selectively drive a respective switch in a first mode and a second mode, wherein the switch driver circuits drive the switches based on control signals received from the controller in the first mode, and the switch driver circuits drive the switches as a sync rectifier in the second mode, wherein each of the plurality of switch driver circuits includes; a digital multiplexer having a first input configured to receive the control signals from the controller for driving the switch in the first mode, and a second input configured to receive second control signals for driving the switch in the second mode; and a switch driver having an input and an output, the input being coupled to an output of the digital multiplexer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 25)
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10. A method, comprising:
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controlling a power share controller module, the power share controller module being operable to transmit power in a power transmitting mode, and to receive power in a power receiving mode, the controlling including; sensing a current through a power transmitting/receiving element; and controlling the plurality of switches based on the sensed current, the plurality of switches being coupled to the power transmitting/receiving element, each of the switches having an associated switch driver circuit, the switch driver circuits being configured to selectively drive the switches in a first mode in which the switch driver circuits drive the switches based on control signals received from a controller, and in a second mode in which the switch driver circuits drive the switches as a sync rectifier, each of the switch driver circuits including a digital multiplexer having a first input configured to receive the control signals from the controller for driving the switch in the first mode, and a second input configured to receive second control signals for driving the switch in the second mode, and a switch driver having an input and an output, the input being coupled to an output of the digital multiplexer; in the power receiving mode, controlling the plurality of switches includes; generating a rectified power signal; in the power transmitting mode, controlling the plurality of switches includes; generating a pulse-width modulated (PWM) power signal. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A wireless power transmitting and receiving circuit, comprising:
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an inductive coil; a plurality of switches, each of the plurality of switches having a control terminal and a conduction terminal, the conduction terminal being coupled to the inductive coil; a current sensor configured to sense a current through the inductive coil; a controller coupled to the current sensor and the plurality of switches, the controller being configured to control the plurality of switches based on the sensed current; and a plurality of switch driver circuits, each of the switch driver circuits configured to selectively drive a respective switch in a first mode and a second mode, wherein the switch driver circuits drive the switches based on control signals received from the controller in the first mode, and the switch driver circuits drive the switches as a sync rectifier in the second mode, wherein each of the plurality of switch driver circuits includes; a digital multiplexer having a first input configured to receive the control signals from the controller for driving the switch in the first mode, and a second input configured to receive second control signals for driving the switch in the second mode; and a switch driver having an input and an output, the input being coupled to an output of the digital multiplexer, wherein, in a power receiving mode, the circuit is configured to generate a rectified power signal, wherein, in a power transmitting mode, the circuit is configured to generate a pulse-width modulated (PWM) power signal. - View Dependent Claims (22, 23)
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24. A wireless power transmitting and receiving circuit, comprising:
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an inductive coil; a plurality of switches, each of the plurality of switches having a control terminal and a conduction terminal, the conduction terminal being coupled to the inductive coil; a voltage sensor configured to sense a voltage through the inductive coil; a controller coupled to the current sensor and the plurality of switches, the controller being configured to control the plurality of switches based on the sensed voltage; and a plurality of switch driver circuits, each of the switch driver circuits configured to selectively drive a respective switch in a first mode and a second mode, wherein the switch driver circuits drive the switches based on control signals received from the controller in the first mode, and the switch driver circuits drive the switches as a sync rectifier in the second mode, wherein each of the plurality of switch driver circuits includes; a digital multiplexer having a first input configured to receive the control signals from the controller for driving the switch in the first mode, and a second input configured to receive second control signals for driving the switch in the second mode; and a switch driver having an input and an output, the input being coupled to an output of the digital multiplexer, wherein, in a power receiving mode, the circuit is configured to generate a rectified power signal, and wherein, in a power transmitting mode, the circuit is configured to generate a pulse-width modulated (PWM) power signal.
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Specification