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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
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.
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公开(公告)号：US11309814B2
公开(公告)日：2022-04-19
申请号：US17101910
申请日：2020-11-23
Applicant: Texas Instruments Incorporated
Inventor： Michael Edwin Butenhoff , Rakesh Raja , Nicholas James Oborny
Abstract: Enhanced motor power control circuitry is presented herein. In one implementation, a circuit includes power transistor elements in a half-bridge arrangement configured to selectively switch current for a phase of a motor according to control signals applied to corresponding gate terminals. The circuit also includes control circuitry configured to produce the control signals to achieve target states among the power transistor elements. The control signals have ramp rates determined based at least on polarities of the current through the power transistor elements during inactive states.
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公开(公告)号：US20210083607A1
公开(公告)日：2021-03-18
申请号：US17101910
申请日：2020-11-23
Applicant: Texas Instruments Incorporated
Inventor： Michael Edwin Butenhoff , Rakesh Raja , Nicholas James Oborny
Abstract: Enhanced motor power control circuitry is presented herein. In one implementation, a circuit includes power transistor elements in a half-bridge arrangement configured to selectively switch current for a phase of a motor according to control signals applied to corresponding gate terminals. The circuit also includes control circuitry configured to produce the control signals to achieve target states among the power transistor elements. The control signals have ramp rates determined based at least on polarities of the current through the power transistor elements during inactive states.
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公开(公告)号：US20200212830A1
公开(公告)日：2020-07-02
申请号：US16236983
申请日：2018-12-31
Applicant: c/o Texas Instruments Incorporated
Inventor： Michael Edwin Butenhoff , Rakesh Raja , Nicholas James Oborny
Abstract: Enhanced motor power control circuitry is presented herein. In one implementation, a circuit includes power transistor elements in a half-bridge arrangement configured to selectively switch current for a phase of a motor according to control signals applied to corresponding gate terminals. The circuit also includes control circuitry configured to produce the control signals to achieve target states among the power transistor elements. The control signals have ramp rates determined based at least on polarities of the current through the power transistor elements during inactive states.
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