公开(公告)号：US20240380254A1

公开(公告)日：2024-11-14

申请号：US18468713

申请日：2023-09-17

Applicant: Richtek Technology Corporation

Inventor： Li-Ting Tsai ,  Fu-Chi Lin

IPC: H02J50/90 ,  H02J50/12 ,  H02J50/80

Abstract: A wireless power transmitter circuit includes a power stage circuit including switches coupled to a resonant transmitter circuit; and a transmission control circuit controlling the power stage circuit and including: a modulation circuit generating a PWM control signal during a power supply procedure, to control the switches to convert a DC power and generate a wireless transmission power at the resonant transmitter circuit, thereby supplying the wireless power to a corresponding wireless power receiver circuit; a storage unit storing an authentication code-threshold database; and a communication circuit receiving an authentication code and a signal intensity value transmitted by the wireless power receiver circuit, to read an alignment intensity threshold corresponding to the authentication code from the storage unit, and to compare the signal intensity value with the alignment intensity threshold during a groping procedure to determine whether the wireless power transmitter circuit is aligned with the wireless power receiver circuit.