公开(公告)号：US20200153429A1

公开(公告)日：2020-05-14

申请号：US16190784

申请日：2018-11-14

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Michael Edwin BUTENHOFF ,  Rakesh RAJA ,  Nicholas James OBORNY

IPC: H03K17/687 ,  H03K7/08 ,  H02P29/00 ,  G01R31/333

Abstract: An electronic circuit includes a first switch driver, a second switch driver, and a switch node coupled to the first and second switch drivers, and configured to couple to a motor. The electronic circuit also includes slew rate measurement circuitry coupled to the switch node and configured to measure a slew rate of switching operations at the switch node. The electronic circuit also includes a controller coupled to the first switch driver, to the second switch driver, and to the slew rate measurement circuitry, and configured to compare a measured slew rate provided by the slew rate measurement circuitry with a target slew rate, and to selectively adjust control signals to at least one of the first and second switch drivers based on a comparison result. The first and second switch drivers are configured to drive switches to power the motor based on the control signals.