公开(公告)号：US20240106344A1

公开(公告)日：2024-03-28

申请号：US18523488

申请日：2023-11-29

Applicant: STMicroelectronics Asia Pacific Pte Ltd

Inventor： Thanh HA TIEN ,  Yannick GUEDON

IPC: H02M7/219 ,  G01R19/165 ,  H02J50/12 ,  H02M1/00 ,  H02M1/32

CPC classification number: H02M7/219 ,  G01R19/16571 ,  H02J50/12 ,  H02M1/0009 ,  H02M1/32

Abstract: A wireless power-reception system has a bridge rectifier with two high-side and two low-side transistors, linked to input-nodes and sense-resistors. During a first phase, a control circuit activates certain transistors for rectification, producing an output voltage, while modulating a gate voltage of a non-activated low-side transistor to dissipate excess power and regulate the output voltage. During a first given number of occurrences of the first phase, the control circuit determines the current through the low-side transistor having its gate voltage modulated based upon a voltage across a first sense resistor coupled between that low-side transistor and ground. During a second given number of occurrences of the first phase, the control circuit determines the current delivered to the load based upon a voltage across the first sense resistor and a voltage across a second sense resistor coupled between the other low-side transistor and ground.