公开(公告)号：US10520971B2

公开(公告)日：2019-12-31

申请号：US15832071

申请日：2017-12-05

Applicant: Texas Instruments Incorporated

Inventor： Sri Navaneethakrishnan Easwaran ,  Vijayalakshmi Devarajan ,  Timothy Paul Duryea ,  Shanmuganand Chellamuthu

IPC: G05F3/26 ,  B60T8/172 ,  B60T8/1761 ,  H03K17/687

Abstract: A current sink circuit coupled to pull down a gate control node (GCN) for an NMOS power FET that controls an actuator includes first and second NMOS transistors coupled in series between the GCN and a lower rail, where the first NMOS transistor has a gate and drain coupled together through a resistor. The current sink circuit also includes a control signal generation circuit (CSGC) and a negative voltage blocking circuit (NVBC). The CSGC is coupled to receive at least one voltage input and an ignition signal and to provide a first control signal and a second control signal. The NVBC is coupled to pass the first control signal from the control signal generation circuit to the gate of the first NMOS transistor and to block a negative voltage on the GCN from reaching the CSGC. The second control signal is coupled to the gate of the second NMOS transistor.

公开(公告)号：US10116294B1

公开(公告)日：2018-10-30

申请号：US15498385

申请日：2017-04-26

Applicant: Texas Instruments Incorporated

Inventor： Jingwei Xu ,  Vijayalakshmi Devarajan ,  Gangqiang Zhang ,  Angelo William Pereira

IPC: H03B1/00 ,  H03K5/1536 ,  H03K5/15 ,  H03K17/687 ,  H02J7/02 ,  H02J50/10 ,  H02J7/10

CPC classification number: H03K5/1536 ,  H02J7/025 ,  H02J50/10 ,  H02J2007/105 ,  H03K5/1508 ,  H03K17/687

Abstract: Methods and apparatus for detecting zero-volt crossing in a field-effect transistor. A comparator compares a drain-to source voltage of the transistor to a threshold voltage. A gate voltage signal of the transistor is provided to a clock input of the comparator such that said gate voltage signal is used to latch a result of said comparison to an output of the comparator. A control function with respect to the transistor is performed based on the value of the comparator output.

公开(公告)号：US11443889B2

公开(公告)日：2022-09-13

申请号：US16903618

申请日：2020-06-17

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Dushmantha Bandara Rajapaksha ,  Roland Sperlich ,  Anant Shankar Kamath ,  Vijayalakshmi Devarajan ,  Wesley Ray

IPC: H02M3/155 ,  H01F27/28 ,  H04L13/02 ,  H02M1/42

Abstract: A semiconductor package includes a transformer having a primary winding and a secondary winding. The primary winding has first and second terminals and a pair of taps. The secondary winding has first and second terminals and a pair of taps. The semiconductor package includes first and second data transfer circuits, a bridge, and a rectifier. The first data transfer circuit is coupled to the pair of taps of the primary winding. The second data transfer circuit is coupled to the pair of taps of the secondary winding. The bridge is coupled to the first and second terminals of the primary winding. The rectifier is coupled to the first and second terminals of the secondary winding.

公开(公告)号：US10483802B2

公开(公告)日：2019-11-19

申请号：US15458195

申请日：2017-03-14

Applicant: Texas Instruments Incorporated

Inventor： Jingwei Xu ,  Vijayalakshmi Devarajan ,  Lindsay Langford

IPC: H02J50/12 ,  H02M3/04 ,  H02J7/02

Abstract: A wireless resonant power transmitter includes a first half-bridge and a second half-bridge adapted to be class D driven that are coupled to drive a series resonant circuit including a primary inductor (L) having a high side terminal and a low side terminal, and primary capacitor (C). A peak voltage sensor that includes a summing block is coupled across the high side terminal and the low side terminal of the primary L, and a peak-to-peak voltage detector is coupled to an output of the summing block to generate a DC voltage signal that is proportional to a peak-to-peak voltage across the primary C.

公开(公告)号：US20190109493A1

公开(公告)日：2019-04-11

申请号：US16214733

申请日：2018-12-10

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Kosha Mahmodieh ,  Gianpaolo Lisi ,  Ali Djabbari ,  Jingwei Xu ,  Vijayalakshmi Devarajan

IPC: H02J50/10 ,  H02J7/02 ,  H02J50/12

Abstract: An example apparatus includes a feedback loop to: change a direction value when a second current value is greater than a first current value, the second current value being obtained after the first current value; and maintain the direction value when the second current value is less than the first current value. When the direction value corresponds to a first direction value, a summer increases a reference signal by a step size. When the direction value corresponds to a second direction value different than the first direction value, the summer decrease the reference signal by the step size.

公开(公告)号：US11310072B2

公开(公告)日：2022-04-19

申请号：US17063450

申请日：2020-10-05

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Richard Sterling Broughton ,  Vijayalakshmi Devarajan ,  Wesley Ryan Ray ,  Dushmantha Bandara Rajapaksha

IPC: H04L12/40 ,  H04M3/02

Abstract: A transceiver includes a driver stage and a transient-triggered ring suppression circuit. The driver stage has a first transistor coupled between a supply voltage terminal and a first bus terminal and a second transistor coupled between a ground and a second bus terminal. The transient-triggered ring suppression circuit is coupled to the first and second transistors. The transient-triggered ring suppression circuit is configured to be enabled upon transition of the transceiver from a dominant state to a recessive state. Further, while the transceiver is in the recessive state, the transient-triggered ring suppression circuit is configured to attenuate ringing on at least one of the first or second bus terminals.

公开(公告)号：US10382028B2

公开(公告)日：2019-08-13

申请号：US16128038

申请日：2018-09-11

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Jingwei Xu ,  Vijayalakshmi Devarajan ,  Gangqiang Zhang ,  Angelo William Pereira

IPC: H03K5/1536 ,  H03K5/15 ,  H02J7/02 ,  H02J50/10 ,  H03K17/687 ,  H02J7/10 ,  H02M1/00

Abstract: Methods and apparatus for detecting zero-volt crossing in a field-effect transistor. A comparator compares a drain-to source voltage of the transistor to a threshold voltage. A gate voltage signal of the transistor is provided to a clock input of the comparator such that said gate voltage signal is used to latch a result of said comparison to an output of the comparator. A control function with respect to the transistor is performed based on the value of the comparator output.

公开(公告)号：US20190025866A1

公开(公告)日：2019-01-24

申请号：US15832071

申请日：2017-12-05

Applicant: Texas Instruments Incorporated

Inventor： Sri Navaneethakrishnan Easwaran ,  Vijayalakshmi Devarajan ,  Timothy Paul Duryea ,  Shanmuganand Chellamuthu

IPC: G05F3/26 ,  H03K17/687 ,  B60T8/1761 ,  B60T8/172

Abstract: A current sink circuit coupled to pull down a gate control node (GCN) for an NMOS power FET that controls an actuator includes first and second NMOS transistors coupled in series between the GCN and a lower rail, where the first NMOS transistor has a gate and drain coupled together through a resistor. The current sink circuit also includes a control signal generation circuit (CSGC) and a negative voltage blocking circuit (NVBC). The CSGC is coupled to receive at least one voltage input and an ignition signal and to provide a first control signal and a second control signal. The NVBC is coupled to pass the first control signal from the control signal generation circuit to the gate of the first NMOS transistor and to block a negative voltage on the GCN from reaching the CSGC. The second control signal is coupled to the gate of the second NMOS transistor.

公开(公告)号：US20180316339A1

公开(公告)日：2018-11-01

申请号：US15498385

申请日：2017-04-26

Applicant: Texas Instruments Incorporated

Inventor： Jingwei Xu ,  Vijayalakshmi Devarajan ,  Gangqiang Zhang ,  Angelo William Pereira

IPC: H03K5/1536 ,  H03K5/15 ,  H03K17/687 ,  H02J7/02 ,  H02J50/10

CPC classification number: H03K5/1536 ,  H02J7/025 ,  H02J50/10 ,  H02J2007/105 ,  H03K5/1508 ,  H03K17/687

Abstract: Methods and apparatus for detecting zero-volt crossing in a field-effect transistor. A comparator compares a drain-to source voltage of the transistor to a threshold voltage. A gate voltage signal of the transistor is provided to a clock input of the comparator such that said gate voltage signal is used to latch a result of said comparison to an output of the comparator. A control function with respect to the transistor is performed based on the value of the comparator output.

公开(公告)号：US20180152048A1

公开(公告)日：2018-05-31

申请号：US15362563

申请日：2016-11-28

Applicant: Texas Instruments Incorporated

Inventor： Kosha Mahmodieh ,  Gianpaolo Lisi ,  Ali Djabbari ,  Jingwei Xu ,  Vijayalakshmi Devarajan

IPC: H02J50/10 ,  H02J7/02

CPC classification number: H02J50/10 ,  H02J7/025 ,  H02J50/12

Abstract: Methods, apparatus, systems and articles of manufacture to efficiently transfer power wirelessly are disclosed. An example apparatus includes a feedback loop to when a second current value is greater than a first current value, change a direction value, the second current value being obtained after the first current value; when the second current value is less than the first current value, maintain the direction value; and a summer to when the direction value corresponds to a first direction value, increase a reference signal by a step size; and when the direction value corresponds to a second direction value different than the first direction value, decrease the reference signal by the step size.