公开(公告)号：US20200161293A1

公开(公告)日：2020-05-21

申请号：US16751491

申请日：2020-01-24

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Qingjie Ma ,  Wei Xu ,  Jingwei Xu ,  Yang Wang

IPC: H01L27/02 ,  H03K17/081 ,  H03K17/0812

Abstract: In a described example, an apparatus includes: a first metal oxide semiconductor field effect transistor (MOSFET) coupled between a first input terminal for receiving a supply voltage and an output terminal for coupling to a load, and having a first gate terminal; an enable terminal coupled to the first gate terminal for receiving an enable signal; a first current mirror coupled between the first input terminal and a first terminal of a first series resistor and having an input coupled to the first gate terminal; and a second MOSFET coupled between the first gate terminal and the output terminal, and having a second gate terminal coupled to the first terminal of the first series resistor, the first series resistor having a second terminal coupled to the output terminal.

公开(公告)号：US10530186B2

公开(公告)日：2020-01-07

申请号：US15674360

申请日：2017-08-10

Applicant: Texas Instruments Incorporated

Inventor： Marius Vicentiu Dina ,  Salman Mazhar ,  Jingwei Xu

IPC: G06F1/00 ,  H02J50/10 ,  G06F1/26 ,  G06F1/324 ,  H02M3/335 ,  H03L7/099 ,  H02J7/02

Abstract: Systems and methods for wireless power transfer with fractional timing resolution are described. In some embodiments, an electrical power transmitter may include a transistor and a rising edge control circuit configured to control a gate of the transistor to produce a rising edge of a pulse at a time selected with a resolution greater than a full-clock period.

公开(公告)号：US10153661B2

公开(公告)日：2018-12-11

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

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.

公开(公告)号：US10088856B2

公开(公告)日：2018-10-02

申请号：US15588089

申请日：2017-05-05

Applicant: Texas Instruments Incorporated

Inventor： Alvin Xu ,  Qingjie Ma ,  Yang Wang ,  Yan He ,  Jun Ma ,  Zhenghao Cui ,  Jingwei Xu

IPC: G05F1/56 ,  G05F1/567 ,  G05F3/30

Abstract: Methods, apparatus, systems and articles of manufacture for negative output voltage active clamping using a floating bandgap reference and temperature compensation are disclosed. An example load switch includes a floating bandgap reference circuit to generate a bandgap reference voltage. A resistor divider is to generate a resistor divider voltage. A temperature compensator to apply a temperature compensation current to the resistor divider to create a temperature compensated resistor divider voltage. A power transistor is to be enabled when the temperature compensated resistor divider voltage is less than the bandgap reference voltage. The example load switch can work under negative output voltage clamping and get better accuracy drain to source clamped voltage of power transistor for inductive load condition.

公开(公告)号：US11283361B2

公开(公告)日：2022-03-22

申请号：US16554095

申请日：2019-08-28

Applicant: Texas Instruments Incorporated

Inventor： Mustapha El Markhi ,  Erhan Ozalevli ,  Tuli Dake ,  Dingkun Du ,  Gianpaolo Lisi ,  Jingwei Xu

IPC: H02M3/335 ,  H02J50/12 ,  H02M1/08

Abstract: A wireless power transfer system using a resonant rectifier circuit with capacitor sensing. A wireless power transfer system includes a power receiver resonant circuit and a synchronous rectifier. The power receiver resonant circuit includes an inductor and a capacitor connected in series with the inductor. The synchronous rectifier is configured to identify zero crossings of alternating current flowing through the inductor based on voltage across the capacitor, and control synchronous rectification of the alternating current based on timing of the zero crossings.

公开(公告)号：US10586791B2

公开(公告)日：2020-03-10

申请号：US16035007

申请日：2018-07-13

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Qingjie Ma ,  Wei Xu ,  Jingwei Xu ,  Yang Wang

IPC: H03K17/0812 ,  H01L27/02 ,  H03K17/081 ,  H03K17/08

Abstract: In a described example, an apparatus includes: a first metal oxide semiconductor field effect transistor (MOSFET) coupled between a first input terminal for receiving a supply voltage and an output terminal for coupling to a load, and having a first gate terminal; an enable terminal coupled to the first gate terminal for receiving an enable signal; a first current mirror coupled between the first input terminal and a first terminal of a first series resistor and having an input coupled to the first gate terminal; and a second MOSFET coupled between the first gate terminal and the output terminal, and having a second gate terminal coupled to the first terminal of the first series resistor, the first series resistor having a second terminal coupled to the output terminal.

公开(公告)号：US20190279977A1

公开(公告)日：2019-09-12

申请号：US16035007

申请日：2018-07-13

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Qingjie Ma ,  Wei Xu ,  Jingwei Xu ,  Yang Wang

IPC: H01L27/02 ,  H03K17/081 ,  H03K17/0812

Abstract: In a described example, an apparatus includes: a first metal oxide semiconductor field effect transistor (MOSFET) coupled between a first input terminal for receiving a supply voltage and an output terminal for coupling to a load, and having a first gate terminal; an enable terminal coupled to the first gate terminal for receiving an enable signal; a first current mirror coupled between the first input terminal and a first terminal of a first series resistor and having an input coupled to the first gate terminal; and a second MOSFET coupled between the first gate terminal and the output terminal, and having a second gate terminal coupled to the first terminal of the first series resistor, the first series resistor having a second terminal coupled to the output terminal.

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：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：US10038436B2

公开(公告)日：2018-07-31

申请号：US15347380

申请日：2016-11-09

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Ruochen Zhang ,  Xiaofan Qiu ,  Jingwei Xu ,  Qingjie Ma

IPC: H03K3/00 ,  H03K17/16 ,  H03K19/0175 ,  H03K17/082 ,  H03K17/284

CPC classification number: H03K17/165 ,  H03K17/0822 ,  H03K17/284 ,  H03K19/017509 ,  H03K2217/0027

Abstract: A gate driver IC for driving an NMOS transistor having a drain coupled through a load to a power supply. A gate driver output drives the gate of the NMOS transistor. A comparator receives the drain voltage of the NMOS transistor and compares it to a reference voltage representative of a short circuit condition between the drain and the power supply. The comparator outputs a first value if the drain voltage is greater than the reference voltage and outputs a second value if the drain voltage is less than or equal to the reference voltage. Control circuitry receives the output of the first comparator and pulls the voltage of the gate driver output low if the comparator output is of the first value. Adaptive masking circuitry is operable, upon an application of an “on” signal to the gate driver output, to mask the output of the comparator such that a condition of the drain voltage being greater than the reference voltage does not cause the control circuitry to pull the voltage of the gate driver output low. The adaptive masking circuitry detects a Miller plateau in the gate voltage of the external NMOS transistor. The adaptive masking circuitry stops masking the output of the comparator after the end of the Miller plateau.