Systems and methods for limiting voltage in wireless power receivers

摘要

This disclosure provides systems, methods, and apparatus for the limiting of voltage in wireless power receivers. In one aspect, an apparatus includes a power transfer component configured to receive power wirelessly from a transmitter. The apparatus further includes a circuit coupled to the power transfer component and configured to reduce a received voltage when activated. The apparatus further includes a controller configured to activate the circuit when the received voltage reaches a first threshold value and configured to deactivate the circuit when the received voltage reaches a second threshold value. The apparatus further includes an antenna configured to generate a signal to the transmitter that signals to the transmitter that the received voltage reached the first threshold value.

主权项

1. An apparatus to receive power wirelessly from a transmitter, comprising:
a power transfer component configured to receive power wirelessly from the transmitter; a circuit coupled to the power transfer component, the circuit configured to reduce a received voltage when activated; a controller configured to provide a control signal to activate the circuit when the received voltage reaches a first threshold value and to deactivate the circuit when the received voltage reaches a second threshold value, wherein the control signal further includes a pulse that is inverted if the received voltage reaches the first threshold value and that is non-inverted if the received voltage falls to the second threshold value; and an antenna configured to transmit the pulse to the transmitter, wherein the pulse indicates to the transmitter that the received voltage reached the first threshold value.