公开(公告)号：US11108345B1

公开(公告)日：2021-08-31

申请号：US16828757

申请日：2020-03-24

Applicant: Texas Instruments Incorporated

Inventor： Nicholas James Oborny ,  Ashish Ojha ,  Priyank Anand ,  Clark Douglas Kinnaird ,  Chinmay Jain ,  Arun Tej Vemuri

IPC: H02P3/10 ,  H02P6/08 ,  H02P7/28 ,  H02P7/06

Abstract: A control circuit includes a first high-side transistor coupled between a voltage supply terminal and the first terminal of a DC motor and a second high-side transistor coupled between the voltage supply terminal and the second terminal of the DC motor. The control circuit includes a first low-side transistor coupled between a ground terminal and the first terminal of the DC motor and a second low-side transistor coupled between the ground terminal and the second terminal of the DC motor. The control circuit includes a first pull-up resistor coupled between the voltage supply terminal and a gate terminal of the first low-side transistor and a second pull-up resistor coupled between the voltage supply terminal and a gate terminal of the second low-side transistor. The pull-up resistors apply bias currents to turn ON the first and second low-side transistors to provide a conductive path to brake the DC motor.

公开(公告)号：US11811342B2

公开(公告)日：2023-11-07

申请号：US17101861

申请日：2020-11-23

Applicant: Texas Instruments Incorporated

Inventor： Chinmay Jain ,  Kalpana Suryawanshi ,  Priyank Anand ,  Ashish Ojha ,  Krishnamurthy Shankar

IPC: H05B41/282 ,  H02P23/14 ,  H03H17/02 ,  G06F1/04 ,  H03K5/24 ,  H03M1/12

CPC classification number: H02P23/14 ,  G06F1/04 ,  H03H17/02 ,  H03K5/24 ,  H03M1/12

Abstract: Disclosed is a ripple counter with a dynamic bandpass filter for a DC motor. The ripple counter includes a current sense amplifier configured to provide an analog voltage responsive to an inline current in rotor windings of the DC motor. The ripple counter also includes an analog-to-digital converter configured to provide a digital signal responsive to the analog voltage. The ripple counter also includes a digital filter configured to receive the digital signal and a clock signal and configured to vary a frequency response to provide a filtered ripple current. The ripple counter also includes a digital comparator circuit configured to receive the filtered ripple current and to provide a pulsed output. The ripple counter also includes a clock generator configured to detect the frequency of the pulsed output and to provide the clock signal responsive to the detected frequency.

公开(公告)号：US20220166357A1

公开(公告)日：2022-05-26

申请号：US17101861

申请日：2020-11-23

Applicant: Texas Instruments Incorporated

Inventor： Chinmay Jain ,  Kalpana Suryawanshi ,  Priyank Anand ,  Ashish Ojha ,  Krishnamurthy Shankar

IPC: H02P23/14 ,  H03H17/02 ,  H03M1/12 ,  H03K5/24 ,  G06F1/04

Abstract: Disclosed is a ripple counter with a dynamic bandpass filter for a DC motor. The ripple counter includes a current sense amplifier configured to provide an analog voltage responsive to an inline current in rotor windings of the DC motor. The ripple counter also includes an analog-to-digital converter configured to provide a digital signal responsive to the analog voltage. The ripple counter also includes a digital filter configured to receive the digital signal and a clock signal and configured to vary a frequency response to provide a filtered ripple current. The ripple counter also includes a digital comparator circuit configured to receive the filtered ripple current and to provide a pulsed output. The ripple counter also includes a clock generator configured to detect the frequency of the pulsed output and to provide the clock signal responsive to the detected frequency.