公开(公告)号：US11177650B2

公开(公告)日：2021-11-16

申请号：US16536825

申请日：2019-08-09

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Karthikeyan Krishnamourthy ,  Viola Schaffer ,  Karim Thomas Taghizadeh Kaschani

IPC: H02H9/04 ,  H03F1/52 ,  H02H9/00 ,  H02H3/14 ,  H03F3/16 ,  H02H3/22 ,  H02H3/20

Abstract: An overvoltage protection circuit includes an input terminal, an output terminal, a clamp transistor, and a selector circuit. The clamp transistor is configured to control current flow between the input terminal and the output terminal. The clamp transistor includes a first terminal coupled to the input terminal, a second terminal coupled to the output terminal. The selector circuit is configured to control a resistance of the clamp transistor based on a voltage at the input terminal. The selector circuit includes a first terminal coupled to the first terminal of the clamp transistor, a second terminal coupled to the second terminal of the clamp transistor, and a third terminal coupled to a third terminal of the clamp transistor.