公开(公告)号：US20180269722A1

公开(公告)日：2018-09-20

申请号：US15458195

申请日：2017-03-14

Applicant: Texas Instruments Incorporated

Inventor： JINGWEI XU ,  VIJAYALAKSHMI DEVARAJAN ,  LINDSAY LANGFORD

IPC: H02J50/12 ,  H02M3/04

CPC classification number: H02J50/12 ,  H02J7/025 ,  H02M3/04

Abstract: A wireless resonant power transmitter includes a first half-bridge and a second half-bridge adapted to be class D driven that are coupled to drive a series resonant circuit including a primary inductor (L) having a high side terminal and a low side terminal, and primary capacitor (C). A peak voltage sensor that includes a summing block is coupled across the high side terminal and the low side terminal of the primary L, and a peak-to-peak voltage detector is coupled to an output of the summing block to generate a DC voltage signal that is proportional to a peak-to-peak voltage across the primary C.