公开(公告)号：US20220302840A1

公开(公告)日：2022-09-22

申请号：US17697008

申请日：2022-03-17

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Rida Shawky ASSAAD ,  Angelo William PEREIRA ,  Gangqiang ZHANG ,  Kae Ann WONG

IPC: H02M3/158 ,  H02M1/08

Abstract: In a switching regulator driver, a sense circuit has a transistor current input and a sense circuit output. A logic circuit has a logic circuit input and first and second outputs. The logic circuit input is coupled to the sense circuit output. A counter has a counter clock input, a counter control input and a counter output. The counter clock input is coupled to the first output. The counter control input is coupled to the second output. The counter is configured to provide a count value at the counter output. A programmable drive strength circuit has a drive strength circuit input and a transistor control output. The drive strength circuit input is coupled to the counter output. The programmable drive strength circuit is configured to adjust a drive current at the transistor control output based on the count value.

公开(公告)号：US20210091562A1

公开(公告)日：2021-03-25

申请号：US16843324

申请日：2020-04-08

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Kae Ann WONG ,  Siang Tong TAN ,  Luis Ariel MALAVE-PEREZ ,  Mikko Topi LOIKKANEN ,  Mitsuyori SAITO ,  Angelo William PEREIRA

IPC: H02H9/04 ,  H02H1/00

Abstract: A system includes a power supply source and a power control circuit coupled to the power supply source, in which the power control circuit includes a pass field-effect transistor (FET). The system also includes a short-to-ground protection circuit coupled to an output of the pass FET. The short-to-ground protection circuit includes a sense circuit configured to detect when a magnitude and a change rate of a voltage drop at the output of the pass FET is greater than respective thresholds. The short-to-ground protection circuit also includes a control node at the output of the sense circuit. The sense circuit is configured to induce a control current at the control node in response to the magnitude and the change rate of a voltage drop at the output of the pass FET being greater than respective thresholds. The control current is used to turn off the pass FET.