公开(公告)号：US20230067632A1

公开(公告)日：2023-03-02

申请号：US17463264

申请日：2021-08-31

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Venkata Naresh KOTIKELAPUDI ,  J DIVYASREE ,  Ganapathi Shankar KRISHNAMURTHY

IPC: H02P8/12 ,  H02P8/34

Abstract: A stepper motor controller includes a first error amplifier, a second error amplifier, and a comparator. The first error amplifier has a first input adapted to be coupled to a current sensor to receive a sensed drive current, a second input adapted to receive an expected drive current and an output to provide a first error signal based on a comparison of the sensed drive current and the expected drive current. The second error amplifier has a first input adapted to be coupled to a voltage sensor to receive a sensed drive voltage, a second input coupled to the output of the first error amplifier and an output to provide a second error signal based on a comparison of the sensed drive voltage and the first error signal. The comparator has a first input adapted to receive a reference signal, a second input coupled to the output of the second error amplifier and an output to provide a stepper motor control signal based on a comparison of the reference signal and the error signal.