FRONT-END CIRCUITS FOR WIRELESS POWER RECEIVERS, WIRELESS CHARGERS AND WIRELESS CHARGING
First Claim
1. A front-end circuit for a wireless power receiver, the circuit comprising:
- input terminals for connection to an antenna;
a rectifier configured to rectify an AC signal having a peak input voltage received at the input terminals and to provide an output having an output voltage;
an over-voltage detector configured to at least one of detect the output voltage exceeding a threshold voltage an overvoltage and detect the peak input voltage exceeding the threshold voltage; and
an over-voltage controller configured to provide an electrical short-circuit across the input terminals in response to the respective output voltage or peak input voltage exceeding the threshold voltage.
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Accused Products
Abstract
A front-end circuit is disclosed for a resonant wireless power receiver, the circuit comprising: input terminals for connection to an antenna; a rectifier configured to rectify an AC signal having a peak input voltage received at the input terminals and to provide an output having an output voltage; an over-voltage detector configured to at least one of detect the output voltage exceeding a threshold voltage an overvoltage and detect the peak input voltage exceeding the threshold voltage; and an over-voltage controller configured to provide an electrical short-circuit across the input terminals in response to the respective output voltage or peak input voltage exceeding the threshold voltage. Integrated circuits, NFC devices and mobile device comprising such a front-end circuit are also disclosed, as is a method for controlling wireless charging.
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Citations
14 Claims
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1. A front-end circuit for a wireless power receiver, the circuit comprising:
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input terminals for connection to an antenna; a rectifier configured to rectify an AC signal having a peak input voltage received at the input terminals and to provide an output having an output voltage; an over-voltage detector configured to at least one of detect the output voltage exceeding a threshold voltage an overvoltage and detect the peak input voltage exceeding the threshold voltage; and an over-voltage controller configured to provide an electrical short-circuit across the input terminals in response to the respective output voltage or peak input voltage exceeding the threshold voltage. - View Dependent Claims (2, 3, 6, 7, 8, 9, 10, 11, 12)
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- 4. A front-end circuit according to claim, further comprising a synchronous rectification controller, and wherein at least two of the rectifying elements each is a switch adapted to be controlled by the synchronous rectification controller to provide synchronous rectification.
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13. A method of providing over-voltage protection to a resonant wireless power transfer receiver, the method comprising:
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rectifying an AC signal received at input terminals to provide an output having an output voltage; one of detecting the output voltage exceeding a threshold voltage and detecting the voltage across the input terminals exceeding a threshold voltage; and providing an electrical short-circuit across the input terminals in response to the respective output voltage or the voltage across the input terminals exceeding the threshold voltage. - View Dependent Claims (14)
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Specification