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公开(公告)号：US20240223111A1
公开(公告)日：2024-07-04
申请号：US18343821
申请日：2023-06-29
Applicant: Texas Instruments Incorporated
Inventor： Venkata Naresh Kotikelapudi , Laxman Sreekumar
IPC: H02P8/36
CPC classification number: H02P8/36
Abstract: Motor driver circuitry including driver transistors coupled to first and second output terminals, gate driver circuitry with outputs coupled to gate terminals of the driver transistors, controller circuitry coupled to the gate driver circuitry, a trip limit current source, an open-load limit current source, comparator circuitry, and fault detect circuitry. The comparator circuitry is coupled to the driver transistors, to the trip limit current source, and to the open-load limit current source. The comparator circuitry compares a drive current at the driver transistors with a trip limit current responsive to a signal from the controller indicating a standstill state, and configured to compare the driver current with an open-load limit current responsive to the signal indicating a motor running state. The fault detect circuitry has an input coupled to the comparator output and has a fault output.
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公开(公告)号：US11949364B2
公开(公告)日：2024-04-02
申请号：US17489269
申请日：2021-09-29
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Venkata Naresh Kotikelapudi , Ganapathi Shankar Krishnamurthy , Laxman Sreekumar , Siddhartha Gopal Krishna
IPC: H02P8/38 , G01R19/165 , H02P7/03 , H02P8/12 , H02P8/34 , H03K5/24 , H03K3/0233
CPC classification number: H02P8/12 , G01R19/16538 , H02P7/04 , H02P8/34 , H03K5/24 , H03K3/02337
Abstract: A method for controlling a stepper motor includes calculating a duty cycle of a current provided to the stepper motor and comparing a difference, between the calculated duty cycle and a base duty cycle of current provided to the stepper motor under a base load condition, to a reference duty cycle value. The method also includes adjusting a peak current level of the current provided to the stepper motor responsive to the comparison.
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公开(公告)号：US20220416697A1
公开(公告)日：2022-12-29
申请号：US17357812
申请日：2021-06-24
Applicant: Texas Instruments Incorporated
Inventor： Venkatesh Guduri , Venkata Naresh Kotikelapudi , Ganapathi Shankar Krishnamurthy , Ashish Ojha
IPC: H02P7/03
Abstract: A driver circuit includes a first switch which has a first terminal coupled to a voltage supply terminal, a second terminal coupled to a high-side gate, and a third terminal coupled to receive a voltage supply enable signal. The first switch is operable to connect the voltage supply terminal to the high-side gate responsive to the voltage supply enable signal. The driver circuit includes a second switch which has a first terminal coupled to a charge pump terminal, a second terminal coupled to the high side gate, and a third terminal coupled to receive a charge pump enable signal. The second switch is operable to connect the charge pump terminal to the high-side gate responsive to the charge pump enable signal.
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公开(公告)号：US11539315B1
公开(公告)日：2022-12-27
申请号：US17357812
申请日：2021-06-24
Applicant: Texas Instruments Incorporated
Inventor： Venkatesh Guduri , Venkata Naresh Kotikelapudi , Ganapathi Shankar Krishnamurthy , Ashish Ojha
Abstract: A driver circuit includes a first switch which has a first terminal coupled to a voltage supply terminal, a second terminal coupled to a high-side gate, and a third terminal coupled to receive a voltage supply enable signal. The first switch is operable to connect the voltage supply terminal to the high-side gate responsive to the voltage supply enable signal. The driver circuit includes a second switch which has a first terminal coupled to a charge pump terminal, a second terminal coupled to the high side gate, and a third terminal coupled to receive a charge pump enable signal. The second switch is operable to connect the charge pump terminal to the high-side gate responsive to the charge pump enable signal.
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公开(公告)号：US11171587B2
公开(公告)日：2021-11-09
申请号：US16703403
申请日：2019-12-04
Applicant: Texas Instruments Incorporated
IPC: H02P8/12 , G01R19/165 , H03K5/24 , H03M1/00 , H02P7/03 , H02P8/22 , H03K17/687 , H03K3/3565
Abstract: An integrated circuit includes an H-bridge circuit having a first output node for coupling to a high-side terminal of an inductor and a second output node for coupling to a low-side terminal of the inductor. A current sense FET is coupled between a current source and the lower supply voltage to provide a reference current that includes a peak current limit at a sensing node. A current-sense comparator has a first input coupled to the sensing node, a second input coupled to the second output node and an output coupled to send an output signal towards a driver control circuit. A FET linear detection circuit is coupled to receive a gate voltage of an active low-side power FET and has an output coupled to enable the current-sense comparator when the active low-side power FET is operating in a linear region.
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Patent Agency Ranking
16.发明申请公开(公告)号：US20250080088A1
公开(公告)日：2025-03-06
申请号：US18240605
申请日：2023-08-31
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Sreenath Puthumana , Ganapathi Shankar , Venkata Naresh Kotikelapudi
Abstract: A circuit includes an amplifier having a first input, a reference input, and an output. A pulse width modulator (PWM) controller has an input coupled to the output of the amplifier. A first switch has a control terminal coupled to an output of the PWM controller. A second switch has a second terminal coupled to the second terminal of the first switch, and has a control terminal coupled to the output of the PWM controller. An input of a current sensor is coupled to the second terminal of the first switch and is coupled to a second terminal of the second switch. An output of the current sensor is coupled to the first input of the amplifier. A duty cycle monitoring and reference signal adjustment circuit has an input coupled to the output of the PWM controller and has an output coupled to the reference input of the amplifier.
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17.发明授权公开(公告)号：US12143056B2
公开(公告)日：2024-11-12
申请号：US17463264
申请日：2021-08-31
Applicant: TEXAS INSTRUMENTS INCORPORATED
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.
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公开(公告)号：US20240333186A1
公开(公告)日：2024-10-03
申请号：US18193679
申请日：2023-03-31
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Shivam Kumar , Venkata Naresh Kotikelapudi
IPC: H02P23/14
CPC classification number: H02P23/14
Abstract: A motor controller including load angle error determination circuitry for determining a load angle error based on a difference between a motor load angle and a reference load angle. The motor load angle indicates an angle between a stator magnetic field and a rotor magnetic field of a motor. The motor controller includes current control circuitry for setting a current level for the motor based on the load angle error. The motor controller includes reference load angle control circuitry for setting the reference load angle based on the current level.
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19.发明授权公开(公告)号：US12081159B2
公开(公告)日：2024-09-03
申请号：US17592921
申请日：2022-02-04
Applicant: Texas Instruments Incorporated
Inventor： Venkata Naresh Kotikelapudi , Kaushik Alwala , David Magee , James Lockridge , Siddhartha Gopal Krishna
Abstract: A motor control system and method for controlling a brushed direct current (BDC) motor using a feedback loop based on a corrected ripple count. Motor control circuitry, for example implemented in digital logic such as a microcontroller, receives a coil current signal and a motor voltage signal. Discontinuities in the coil current signal, such as caused by commutation of the BDC motor, are counted to generate a ripple count. An observer function derives an angular frequency model estimate for the values of the coil current and motor voltage signals using a computational model for the motor. A corrected ripple count is generated based on a comparison of a commutation angle of the motor with an angular position based on the angular frequency model estimate over a time interval between discontinuity pulses. A motor drive signal is adjusted based on the corrected ripple count.
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20.发明公开公开(公告)号：US20230253898A1
公开(公告)日：2023-08-10
申请号：US17592921
申请日：2022-02-04
Applicant: Texas Instruments Incorporated
Inventor： Venkata Naresh Kotikelapudi , Kaushik Alwala , David Magee , James Lockridge , Siddhartha Gopal Krishna
Abstract: A motor control system and method for controlling a brushed direct current (BDC) motor using a feedback loop based on a corrected ripple count. Motor control circuitry, for example implemented in digital logic such as a microcontroller, receives a coil current signal and a motor voltage signal. Discontinuities in the coil current signal, such as caused by commutation of the BDC motor, are counted to generate a ripple count. An observer function derives an angular frequency model estimate for the values of the coil current and motor voltage signals using a computational model for the motor. A corrected ripple count is generated based on a comparison of a commutation angle of the motor with an angular position based on the angular frequency model estimate over a time interval between discontinuity pulses. A motor drive signal is adjusted based on the corrected ripple count.
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