公开(公告)号：US11799281B2

公开(公告)日：2023-10-24

申请号：US17514774

申请日：2021-10-29

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Eung Jung Kim ,  Wenchao Qu

IPC: H02H3/08 ,  H02H1/06

CPC classification number: H02H3/08 ,  H02H1/06

Abstract: In some examples, this description provides for an apparatus. The apparatus includes a power switch having a power switch source configured to receive an input voltage, a power switch drain, and a power switch gate. The apparatus also includes a current sense component coupled to the power switch. The apparatus also includes a current limiting circuit coupled to the power switch gate, the power switch drain, and the current sense component. The apparatus also includes an over-current protection (OCP) circuit coupled to the power switch source, the power switch drain, and the power switch gate. The apparatus also includes an output voltage (VOUT) clamp coupled to the power switch drain and the power switch gate.

公开(公告)号：US11781920B2

公开(公告)日：2023-10-10

申请号：US17706113

申请日：2022-03-28

Applicant: Texas Instruments Incorporated

Inventor： Eung Jung Kim ,  Abidur Rahman

IPC: G01K7/21 ,  G01K7/02 ,  G01K7/16

CPC classification number: G01K7/021 ,  G01K7/16

Abstract: An example device includes a first temperature sensor configured to provide a first current signal indicative of a temperature of a first circuit based on a voltage of a first temperature sensing element. The first circuit includes a power switch device and the first temperature sensing element. A second temperature sensor is configured to provide a second current signal indicative of temperature of a second circuit based on a voltage of a second temperature sensing element. The second circuit includes the second temperature sensing element. A trim circuit is configured to trim current in at least one of the first temperature sensor or the second temperature sensor to compensate for mismatch between temperature coefficients of the first and second temperature sensing elements.

公开(公告)号：US11320320B2

公开(公告)日：2022-05-03

申请号：US16395860

申请日：2019-04-26

Applicant: Texas Instruments Incorporated

Inventor： Eung Jung Kim ,  Abidur Rahman

IPC: G01K7/16 ,  G01K7/02

Abstract: An example device includes a first temperature sensor configured to provide a first current signal indicative of a temperature of a first circuit based on a voltage of a first temperature sensing element. The first circuit includes a power switch device and the first temperature sensing element. A second temperature sensor is configured to provide a second current signal indicative of temperature of a second circuit based on a voltage of a second temperature sensing element. The second circuit includes the second temperature sensing element. A trim circuit is configured to trim current in at least one of the first temperature sensor or the second temperature sensor to compensate for mismatch between temperature coefficients of the first and second temperature sensing elements.

公开(公告)号：US10422818B2

公开(公告)日：2019-09-24

申请号：US15859470

申请日：2017-12-30

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Tikno Harjono ,  Vijay Krishnamurthy ,  Min Chu ,  Kuntal Joardar ,  Gary Eugene Daum ,  Subrato Roy ,  Vinayak Hegde ,  Ankur Chauhan ,  Sathish Vallamkonda ,  Md Abidur Rahman ,  Eung Jung Kim

IPC: G01R15/14 ,  H01L27/06 ,  H03K17/567 ,  H01L25/18 ,  H01L49/02

Abstract: An electronic device comprises: a first semiconductor die; a power transistor integrated in the first semiconductor die, the power transistor comprising a gate, a first terminal, and a second terminal; a sense transistor integrated in the first semiconductor die, the sense transistor comprising a gate coupled to the gate of the power transistor, a first terminal, and a second terminal coupled to the second terminal of the power transistor; and a first resistor integrated in the first semiconductor die, the first resistor comprising a polysilicon section and a metal section coupled to the polysilicon section, the first resistor comprising a first terminal and a second terminal, wherein the first terminal of the first resistor is coupled to the first terminal of the sense transistor.

公开(公告)号：US09942956B1

公开(公告)日：2018-04-10

申请号：US15395611

申请日：2016-12-30

Applicant: Texas Instruments Incorporated

Inventor： Wenliang Chen ,  Eung Jung Kim

IPC: H05B33/08 ,  H02M3/158 ,  H05B37/02

CPC classification number: H05B33/0815

Abstract: Embodiments of the invention improve efficiency and address the stability issues that arise when a boost converter is used for both backlight WLEDs and camera flash applications, which require increased voltage or output voltage less than input voltage. In prior solutions, boost converters may suffer poor efficiency when operating in a fixed high output voltage mode or may lose stability by not properly regulating their output when operating in a step-down voltage mode. To improve efficiency of the boost converter, the present invention uses a 100%-pass mode topology when the battery voltage is high enough to support the diode voltage required for the backlight WLEDs or the camera flash. On the other hand, when the battery voltage drops below the required voltage, then the converter switches automatically to boost mode to generate a sufficient output voltage to drive the diodes to the required current level.