Patent ID: 9337664
Filing Date: 2016-05-10
CPC Classification: H02J,H02M

Claim Text:
1. A device for receiving wireless charging power from a source comprising: a receive antenna configured to wirelessly receive charging power from the source; a power converter coupled to the receive antenna and configured to receive an input voltage derived from the charging power and provide at least a portion of the charging power to a load, the power converter further configured to, in response to detecting an increase in the load, reduce an input impedance of the power converter to maintain an output voltage above an output threshold voltage level; and circuitry operationally coupled to the power converter, the circuitry comprising a first transistor coupled to each of an end of a first diode and a ground voltage and a second transistor coupled to each of a feedback voltage that is fed into the power converter via a first resistor and the ground voltage, the circuitry configured to prevent a pulse width modulation duty cycle from increasing above a fixed maximum pulse width modulation duty cycle that prevents the input impedance from dropping below a minimum impedance value.