公开(公告)号：US11646684B2

公开(公告)日：2023-05-09

申请号：US16933583

申请日：2020-07-20

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Krishnamurthy Shankar ,  Venkata Naresh Kotikelapudi ,  Siddhartha Gopal Krishna

IPC: H02P8/12 ,  H02P8/22

CPC classification number: H02P8/12 ,  H02P8/22

Abstract: A stepper motor driver includes an H-bridge including first and second outputs. The H-bridge includes a low-side transistor coupled between the first output and a ground. A reference current circuit is configured to produce a reference current. The reference current circuit has a reference output. An averager circuit includes an input and output. The input of the averager circuit is coupled to the first output of the H-bridge. A comparator includes first and second comparator inputs. The first input of the comparator is coupled to the output of the average circuit and the second input of the comparator is coupled to the reference output.

公开(公告)号：US11255920B2

公开(公告)日：2022-02-22

申请号：US16785793

申请日：2020-02-10

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Ashish Ojha ,  Siddhartha Gopal Krishna ,  Divyasree J ,  Krishnamurthy Shankar ,  Venkata Naresh Kotikelapudi

IPC: G01R31/52 ,  H03K17/687

Abstract: A circuit includes an input terminal, a first transistor, a second transistor, a comparator, a voltage reference circuit, and a control circuit. The first transistor includes a first terminal coupled to the input terminal. The second transistor includes a first terminal coupled to the input terminal. The comparator includes a first terminal coupled to the input terminal. The voltage reference circuit is coupled to a second terminal of the comparator. The control circuit includes an input, a first output, and a second output. The input is coupled to an output of the comparator. The first output is coupled to a second terminal of the first transistor. The second output is coupled to a second terminal of the second transistor.