公开(公告)号：US10812063B2

公开(公告)日：2020-10-20

申请号：US16291747

申请日：2019-03-04

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Md. Abidur Rahman ,  Adam Quirk ,  Stephen Nortman ,  Sualp Aras

IPC: H02H3/00 ,  H03K17/082 ,  H02H3/06 ,  H02H5/04 ,  H03K17/08

Abstract: A circuit protective system. The system includes an output controlling enablement of a transistor and an input sensing an operational parameter associated with the transistor. The system also includes detection circuitry providing an event fault indicator if the operational parameter violates a condition. The system also includes protective circuitry disabling the transistor in response to the event fault indicator and subsequently selectively applying an enabling bias to the transistor; the enabling bias is selected from at least two different bias levels and in response to a number of event fault indications from the detection circuitry.

公开(公告)号：US10366987B2

公开(公告)日：2019-07-30

申请号：US15211450

申请日：2016-07-15

Applicant: Texas Instruments Incorporated

Inventor： David J. Baldwin ,  Hector X. Roman ,  Md. Abidur Rahman

IPC: H01L27/088 ,  G01R19/00 ,  H03K17/08 ,  H03K17/14 ,  H01L29/78

Abstract: Described example embodiments include an integrated circuit having a first channel area with a first FET formed in a semiconductor substrate, the substrate providing a contact to the drain. A second channel area includes a second FET formed in the semiconductor substrate. A pilot FET couples to the first FET in a current mirror configuration. A third FET has a conductivity opposite the first and second FETs and couples to the source of the pilot FET. An op amp includes an output coupled to the gate of the third FET. Signals from the drain of the second FET and the source of the pilot FET couple to the inverting input of the op amp. Signals from the source of the first FET and the drain of the first FET couple to the non-inverting input of the op amp. Methods and additional apparatus are disclosed.

公开(公告)号：US20170033783A1

公开(公告)日：2017-02-02

申请号：US15225507

申请日：2016-08-01

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Md. Abidur Rahman ,  Adam Quirk ,  Stephen Nortman ,  Sualp Aras

IPC: H03K17/082 ,  H02H3/00 ,  H02H3/06 ,  H02H5/04

CPC classification number: H03K17/0822 ,  H02H3/00 ,  H02H3/06 ,  H02H5/041 ,  H03K2017/0806

Abstract: A circuit protective system. The system includes an output controlling enablement of a transistor and an input sensing an operational parameter associated with the transistor. The system also includes detection circuitry providing an event fault indicator if the operational parameter violates a condition. The system also includes protective circuitry disabling the transistor in response to the event fault indicator and subsequently selectively applying an enabling bias to the transistor; the enabling bias is selected from at least two different bias levels and in response to a number of event fault indications from the detection circuitry.

Abstract translation: 电路保护系统。 该系统包括晶体管的输出控制使能和感测与晶体管相关联的操作参数的输入。 如果操作参数违反条件，该系统还包括提供事件故障指示器的检测电路。 该系统还包括保护电路，其响应于事件故障指示器禁用晶体管，随后选择性地向晶体管施加使能偏置; 从至少两个不同的偏置电平和响应于来自检测电路的多个事件故障指示来选择使能偏置。

公开(公告)号：US10284191B2

公开(公告)日：2019-05-07

申请号：US15225507

申请日：2016-08-01

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Md. Abidur Rahman ,  Adam Quirk ,  Stephen Nortman ,  Sualp Aras

IPC: H02H3/00 ,  H03K17/082 ,  H02H5/04 ,  H02H3/06 ,  H03K17/08

Abstract: A circuit protective system. The system includes an output controlling enablement of a transistor and an input sensing an operational parameter associated with the transistor. The system also includes detection circuitry providing an event fault indicator if the operational parameter violates a condition. The system also includes protective circuitry disabling the transistor in response to the event fault indicator and subsequently selectively applying an enabling bias to the transistor; the enabling bias is selected from at least two different bias levels and in response to a number of event fault indications from the detection circuitry.

公开(公告)号：US10014851B2

公开(公告)日：2018-07-03

申请号：US15341205

申请日：2016-11-02

Applicant: Texas Instruments Incorporated

Inventor： Ankur Chauhan ,  Sudheer Prasad ,  Md. Abidur Rahman ,  Subrato Roy

IPC: H03K17/00 ,  H03K17/082 ,  H03K17/687 ,  H01L23/525 ,  G01R19/00

CPC classification number: H03K17/0822 ,  G01R19/0092 ,  H01L23/5256 ,  H03K17/687 ,  H03K2217/0027 ,  H03K2217/0054

Abstract: An apparatus includes: a first power transistor having a first current conduction path coupled between an input for receiving a supply voltage and a node and a first gate terminal coupled to a first gate control signal; a second power transistor having a second current conduction path coupled between the node and an output terminal for supplying a load current to a load; and a second gate terminal coupled to a second gate control signal; and a current sense transistor having a third gate terminal coupled to the first gate control signal, and outputting a sense current. The apparatus further includes: a differential amplifier having an output signal, and a feedback transistor having a gate terminal coupled to the output signal of the differential amplifier; and a resistor coupled between a monitor node and ground.

公开(公告)号：US20170038784A1

公开(公告)日：2017-02-09

申请号：US15231472

申请日：2016-08-08

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Md. Abidur Rahman ,  Sualp Aras ,  Tri Cao Nguyen

IPC: G05F1/571 ,  G01R31/28

CPC classification number: G05F1/571 ,  G01R31/2827 ,  G05F1/569 ,  G05F1/573 ,  H02H3/006 ,  H02H3/08 ,  H02H3/087 ,  H02H3/20 ,  H02H9/02

Abstract: A circuit protective system. The system has: (i) an input for sensing an operational voltage responsive to a current flowing through a transistor; (ii) circuitry for applying a forced voltage at the input; (iii) voltage-to-current conversion circuitry for outputting a reference current in response to the forced voltage at the input; (iv) circuitry for providing a reference trim current in response to a trim indicator; and (v) comparison circuitry for outputting a limit signal in response to a comparison of the reference current and the reference trim current.

Abstract translation: 电路保护系统。 该系统具有：（i）用于感测响应于流过晶体管的电流的工作电压的输入; （ii）在输入端施加强制电压的电路; （iii）电压 - 电流转换电路，用于响应于输入处的强制电压输出参考电流; （iv）响应于修剪指示器提供参考修剪电流的电路; 和（v）用于响应于参考电流和参考调整电流的比较来输出限制信号的比较电路。

公开(公告)号：US20160134283A1

公开(公告)日：2016-05-12

申请号：US14938702

申请日：2015-11-11

Applicant: Texas Instruments Incorporated

Inventor： Vikrant Dhamdhere ,  Kyle Schulmeyer ,  Md. Abidur Rahman

IPC: H03K17/687 ,  H02M3/07 ,  H01L23/528 ,  H01L27/06 ,  H01L23/50

CPC classification number: H03K17/687 ,  H01L2924/0002 ,  H02M1/08 ,  H02M2001/322 ,  H03K17/063 ,  H03K19/0016 ,  H03K2217/0054 ,  H03K2217/0063 ,  H03K2217/0072 ,  H03K2217/0081 ,  H01L2924/00

Abstract: An output discharge circuit for a load switch may include a capacitor coupled between a power rail of the output discharge circuit and a ground lead, and a diode coupled between a power input of the output discharge circuit and the power rail. The output discharge circuit may charge the capacitor via a current path formed by the diode while power is being supplied to the load switch. When the power supply to the output discharge circuit is turned off, the diode may prevent the capacitor from discharging through the current path, and the stored charge on the capacitor may be used to power the output discharge switch for a period of time after the power supply has been turned off. In this way, the output discharge circuit may continue to discharge the output of the load switch even when power is no longer being supplied to the load switch.

Abstract translation: 用于负载开关的输出放电电路可以包括耦合在输出放电电路的电源轨和接地引线之间的电容器和耦合在输出放电电路的电源输入端与电源轨之间的二极管。 当向负载开关供电时，输出放电电路可以通过由二极管形成的电流通路对电容器充电。 当输出放电电路的电源关闭时，二极管可以防止电容器通过电流通路放电，电容器上的存储电荷可以用于在输出电源之后的一段时间内为输出放电开关供电 供应已经关闭。 以这种方式，即使当不再向负载开关供电时，输出放电电路也可以继续放电负载开关的输出。

公开(公告)号：US20190199341A1

公开(公告)日：2019-06-27

申请号：US16291747

申请日：2019-03-04

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Md. Abidur Rahman ,  Adam Quirk ,  Stephen Nortman ,  Sualp Aras

IPC: H03K17/082 ,  H02H3/06 ,  H02H5/04 ,  H02H3/00

CPC classification number: H03K17/0822 ,  H02H3/00 ,  H02H3/006 ,  H02H3/06 ,  H02H5/041 ,  H03K2017/0806

Abstract: A circuit protective system. The system includes an output controlling enablement of a transistor and an input sensing an operational parameter associated with the transistor. The system also includes detection circuitry providing an event fault indicator if the operational parameter violates a condition. The system also includes protective circuitry disabling the transistor in response to the event fault indicator and subsequently selectively applying an enabling bias to the transistor; the enabling bias is selected from at least two different bias levels and in response to a number of event fault indications from the detection circuitry.

公开(公告)号：US10187055B2

公开(公告)日：2019-01-22

申请号：US15694005

申请日：2017-09-01

Applicant: Texas Instruments Incorporated

Inventor： Vikrant Dhamdhere ,  Kyle Schulmeyer ,  Md. Abidur Rahman

IPC: H03K3/00 ,  H03K17/687 ,  H02M1/32 ,  H03K17/06 ,  H03K19/00 ,  H02M1/08

Abstract: An output discharge circuit for a load switch may include a capacitor coupled between a power rail of the output discharge circuit and a ground lead, and a diode coupled between a power input of the output discharge circuit and the power rail. The output discharge circuit may charge the capacitor via a current path formed by the diode while power is being supplied to the load switch. When the power supply to the output discharge circuit is turned off, the diode may prevent the capacitor from discharging through the current path, and the stored charge on the capacitor may be used to power the output discharge switch for a period of time after the power supply has been turned off. In this way, the output discharge circuit may continue to discharge the output of the load switch even when power is no longer being supplied to the load switch.

公开(公告)号：US20170366182A1

公开(公告)日：2017-12-21

申请号：US15694005

申请日：2017-09-01

Applicant: Texas Instruments Incorporated

Inventor： Vikrant Dhamdhere ,  Kyle Schulmeyer ,  Md. Abidur Rahman

IPC: H03K17/687 ,  H02M1/32

CPC classification number: H03K17/687 ,  H01L2924/0002 ,  H02M1/08 ,  H02M2001/322 ,  H03K17/063 ,  H03K19/0016 ,  H03K2217/0054 ,  H03K2217/0063 ,  H03K2217/0072 ,  H03K2217/0081 ,  H01L2924/00

Abstract: An output discharge circuit for a load switch may include a capacitor coupled between a power rail of the output discharge circuit and a ground lead, and a diode coupled between a power input of the output discharge circuit and the power rail. The output discharge circuit may charge the capacitor via a current path formed by the diode while power is being supplied to the load switch. When the power supply to the output discharge circuit is turned off, the diode may prevent the capacitor from discharging through the current path, and the stored charge on the capacitor may be used to power the output discharge switch for a period of time after the power supply has been turned off. In this way, the output discharge circuit may continue to discharge the output of the load switch even when power is no longer being supplied to the load switch.