公开(公告)号：US11888391B2

公开(公告)日：2024-01-30

申请号：US17489233

申请日：2021-09-29

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Shyamsunder Balasubramanian ,  Kuangyu Chiang ,  Toshio Yamanaka ,  Luis Eduardo Ossa

IPC: H02M1/08 ,  H02M3/07 ,  H03K17/06 ,  H02M1/32

CPC classification number: H02M3/07 ,  H02M1/08 ,  H02M1/32 ,  H03K17/063 ,  H03K2217/0081

Abstract: A device includes a charge pump configured to provide a current to a bootstrap capacitor responsive to a charge pump switch being closed. The device also includes a current limiter coupled in series between the charge pump switch and the charge pump. The current limiter is configured to receive a control signal from a controller that indicates whether the device is to operate in a first mode or in a second mode; responsive to the control signal indicating the first mode, allow a first value of current to the charge pump switch; and, responsive to the control signal indicating the second mode, limit the current to the charge pump switch to a second value. The second value is less than the first value.