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公开(公告)号：US20250091458A1
公开(公告)日：2025-03-20
申请号：US18961768
申请日：2024-11-27
Applicant: Texas Instruments Incorporated
Inventor： Priyank Anand , Ashish Ojha , Krishnamurthy Shankar , Venkatesh Guduri
Abstract: Examples of contactor controllers, systems and methods enable quick-turn-off (QTO) using an output voltage of a contactor controller when its supply voltage is below a threshold but does not interfere with QTO when sufficient supply voltage is available. In an example, when VM loss occurs, a high-side (HS) clamp of a contactor controller is disabled, and a low-side (LS) clamp current is generated using the output voltage. The LS clamp current may be adjusted to achieve a desired QTO voltage. In another example, a HS clamp is disabled and the charging of the gate of a LS field-effect transistor (FET) is enabled only when the output voltage increases above a power-off QTO threshold (less than the LS clamp voltage); the QTO voltage is set by a voltage detection and comparison circuit of the contactor controller.
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Patent Agency Ranking
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
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.
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13.发明授权公开(公告)号：US11716072B1
公开(公告)日：2023-08-01
申请号：US17682619
申请日：2022-02-28
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Ashish Ojha , Priyank Anand , Anand Gopalan , Krishnamurthy Shankar
IPC: H03K3/00 , H03K3/011 , H03K17/687
CPC classification number: H03K3/011 , H03K17/6874 , H03K2217/0063 , H03K2217/0072
Abstract: Examples of contactor controllers, systems and methods time-modulate levels of high-side (HS) and low-side (LS) clamp voltages in a contactor controller to switch a path through which current flows during quick-turn-off (QTO) of the contactor controller. One of the clamp voltages is at a high level and the other is at a low level. The output voltage of the contactor controller is held at the low level. The path switching may be a function of one or more parameters. In a configuration, the level of a supply voltage of the contactor controller is monitored and used to control the path switching. In a configuration, temperatures of HS and LS transistors of the contactor controller are monitored and used to control the path switching. Control of the path switching may be performed to dissipate power in a larger area to increase thermal performance of the contactor controller. Both clamps may remain active throughout the QTO process, providing redundancy and safety.
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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：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
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.
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