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公开(公告)号：US10578666B2
公开(公告)日：2020-03-03
申请号：US15213140
申请日：2016-07-18
Applicant: TEXAS INSTRUMENTS INCORPORATED
Abstract: A circuit comprises a CLVS, a LEA coupled to the CLVS, and a peak detector coupled to the CLVS and the LEA, wherein the peak detector is a switch-based peak detector. A method comprises closing a first switch for a period of time to provide a current to an actuator, opening the first switch after the period, measuring, after the opening, a voltage associated with the actuator, and determining, based on the measuring and using an ADC, whether a diode is present in the actuator and coupled with a correct polarity, is missing, or is present in the actuator and coupled with an incorrect polarity.
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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.
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公开(公告)号：US20150318691A2
公开(公告)日：2015-11-05
申请号：US13971351
申请日：2013-08-20
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Sri Navaneethakrishnan Easwaran
Abstract: Apparatus and methods disclosed herein implement steady-state and fast transient electronic current limiting through power transistors, including power transistors used as pass elements associated with general purpose drivers. Embodiments herein prevent excessive steady-state current flow through one or more driver pass elements and/or through load elements in series with the pass element(s) via a current sensing and driver preamplifier feedback loop. A transient over-current protection circuit includes a fast transient switch and a transient over-current control circuit. The transient over-current control circuit rectifies one or more transient voltage spikes to create a momentary direct current (DC) voltage power supply (MVS) to power a fast transient driver circuit and to trip the fast transient switch. The fast transient switch discharges a transient pass element input voltage (e.g., a gate voltage on a MOSFET power transistor in some embodiments) and terminates current flow through the pass element current channel.
Abstract translation: 本文公开的装置和方法通过功率晶体管实现稳态和快速瞬态电流限制，包括用作与通用驱动器相关联的通路元件的功率晶体管。 本文的实施例防止了通过一个或多个驱动器通过元件和/或通过电流感测和驱动器前置放大器反馈回路与通过元件串联的负载元件的过大的稳态电流。 瞬态过电流保护电路包括快速瞬态开关和瞬态过电流控制电路。 瞬态过电流控制电路对一个或多个瞬态电压尖峰进行整流，以产生瞬时直流（DC）电压电源（MVS），为快速瞬态驱动电路供电并跳闸快速瞬态开关。 快速瞬态开关放电瞬态通过元件输入电压（例如，在一些实施例中为MOSFET功率晶体管上的栅极电压）并终止通过通过元件电流通道的电流。
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公开(公告)号：US11581723B2
公开(公告)日：2023-02-14
申请号：US17101215
申请日：2020-11-23
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Sri Navaneethakrishnan Easwaran , Zhipeng Ye , Deepak Sreedharan
Abstract: An integrated circuit includes an output terminal, an analog output circuit, a digital output circuit, and a protection circuit. The analog output circuit includes an output coupled to the output terminal. The digital output circuit includes an output. The protection circuit includes a protection transistor and a comparator circuit. The protection transistor includes a first terminal coupled to the output of the digital output circuit, a second terminal coupled to the output terminal, and a control terminal. The comparator circuit includes a first input coupled to the output terminal, a second input coupled to a reference current source, and an output coupled to the control terminal of the protection transistor.
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公开(公告)号：US11368009B2
公开(公告)日：2022-06-21
申请号：US17020086
申请日：2020-09-14
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Sri Navaneethakrishnan Easwaran , Timothy Paul Duryea
IPC: H02H3/00 , H03K17/687 , H04B1/40 , H03F3/45
Abstract: An electronic control unit (ECU) operates between first and second voltage rails and includes an amplifier circuit and a single current sense circuit coupled to carry a signal to a bus pin and to protect the bus pin from both a short to ground and a short to battery. The single current sense circuit includes a switch circuit that passes the signal to the bus pin and a forward current sensing circuit that provides a second current that is proportional to an output current at the bus pin. The forward current sensing circuit causes the second current to be substantially zero when voltage on the bus pin is above a given value. The single current sense circuit also includes a forward current protection circuit and a reverse current switching circuit that receives the second current and closes a connection to the second voltage when the second current is zero.
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Patent Agency Ranking
公开(公告)号：US20200373960A1
公开(公告)日：2020-11-26
申请号：US16991553
申请日：2020-08-12
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Sri Navaneethakrishnan Easwaran , Ted F. Lekan , Michael J. Zroka , Darren J. Rollman
Abstract: Multiple sensors are coupled to a first pin of a PSI5 transceiver to receive a sensor bus signal. A Manchester decoder is coupled to a second pin and a battery is coupled to a third pin. A comparator receives a first voltage that is proportional to a current on the sensor bus signal and a second voltage that is proportional to a base current on the sensor bus signal and sends a data output signal to the second pin. A sample-and-hold circuit captures a third voltage used to effect the second voltage responsive to a high value on a base current sampling signal. A base-current-renewal circuit detects edge transitions on the data output signal and when the data output signal has no edge transitions for a period of time greater than a gap time defined in a PSI5 standard, sets the base current sampling signal high.
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公开(公告)号：US20190280472A1
公开(公告)日：2019-09-12
申请号：US15913465
申请日：2018-03-06
Applicant: Texas Instruments Incorporated
Inventor： Sri Navaneethakrishnan Easwaran , Timothy Paul Duryea
IPC: H02H3/00 , H03K17/687
Abstract: An electronic control unit (ECU) operates between first and second voltage rails and includes an amplifier circuit and a single current sense circuit coupled to carry a signal to a bus pin and to protect the bus pin from both a short to ground and a short to battery. The single current sense circuit includes a switch circuit that passes the signal to the bus pin and a forward current sensing circuit that provides a second current that is proportional to an output current at the bus pin. The forward current sensing circuit causes the second current to be substantially zero when voltage on the bus pin is above a given value. The single current sense circuit also includes a forward current protection circuit and a reverse current switching circuit that receives the second current and closes a connection to the second voltage when the second current is zero.
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公开(公告)号：US09893757B2
公开(公告)日：2018-02-13
申请号：US15211039
申请日：2016-07-15
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Sri Navaneethakrishnan Easwaran
CPC classification number: H04B1/40 , H03F1/0227 , H03F3/193 , H03F3/245 , H03F3/301 , H03F2200/18 , H03F2200/249 , H03F2200/451 , H04L67/12
Abstract: One example includes an amplifier system. The amplifier system includes an input stage configured to receive an input pulse signal and to generate a reference voltage pulse based on the input pulse signal. The amplifier system also includes an amplifier stage that receives at least one power voltage and is configured to amplify the reference voltage pulse and to provide pulse-shaping of the amplified reference voltage pulse based on a change of amplitude of the at least one power voltage resulting from an amplitude of the reference voltage pulse.
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公开(公告)号：US20160349774A1
公开(公告)日：2016-12-01
申请号：US14930906
申请日：2015-11-03
Applicant: TEXAS INSTRUMENTS INCORPORATED
IPC: G05F1/56
Abstract: Dynamic biasing circuits for low drop out (LDO) regulators are described. In some embodiments, an electronic circuit may include a low drop out (LDO) regulator; and a biasing circuit coupled to the LDO regulator, the biasing circuit configured to: monitor a first electrical current and a second electrical current; select a greater of the first or second electrical currents; and provide the selected electrical current to the LDO regulator. In other embodiments, a method may include: providing a digital core and a low drop out (LDO) regulator coupled to the digital core, wherein the digital core is configured to operate in an active mode and in a standby mode; monitoring, via a current selector circuit coupled to the LDO regulator, a first current and a second current; selecting a greater of the first or second electrical currents; and providing the selected current as a biasing current to the LDO regulator.
Abstract translation: 描述了用于低压降（LDO）调节器的动态偏置电路。 在一些实施例中，电子电路可以包括低压降（LDO）调节器; 以及耦合到所述LDO调节器的偏置电路，所述偏置电路被配置为：监视第一电流和第二电流; 选择较大的第一或第二电流; 并将所选择的电流提供给LDO调节器。 在其他实施例中，方法可以包括：提供耦合到数字核心的数字核心和低压降（LDO）调节器，其中所述数字核心被配置为以活动模式和待机模式操作; 通过耦合到LDO调节器的电流选择器电路监测第一电流和第二电流; 选择较大的第一或第二电流; 并将所选择的电流作为偏置电流提供给LDO调节器。
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公开(公告)号：US09343898B2
公开(公告)日：2016-05-17
申请号：US13971351
申请日：2013-08-20
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Sri Navaneethakrishnan Easwaran
Abstract: Apparatus and methods disclosed herein implement steady-state and fast transient electronic current limiting through power transistors, including power transistors used as pass elements associated with general purpose drivers. Embodiments herein prevent excessive steady-state current flow through one or more driver pass elements and/or through load elements in series with the pass element(s) via a current sensing and driver preamplifier feedback loop. A transient over-current protection circuit includes a fast transient switch and a transient over-current control circuit. The transient over-current control circuit rectifies one or more transient voltage spikes to create a momentary direct current (DC) voltage power supply (MVS) to power a fast transient driver circuit and to trip the fast transient switch. The fast transient switch discharges a transient pass element input voltage (e.g., a gate voltage on a MOSFET power transistor in some embodiments) and terminates current flow through the pass element current channel.
Abstract translation: 本文公开的装置和方法通过功率晶体管实现稳态和快速瞬态电流限制，包括用作与通用驱动器相关联的通路元件的功率晶体管。 本文的实施例防止了通过一个或多个驱动器通过元件和/或通过电流感测和驱动器前置放大器反馈回路与通过元件串联的负载元件的过大的稳态电流。 瞬态过电流保护电路包括快速瞬态开关和瞬态过电流控制电路。 瞬态过电流控制电路对一个或多个瞬态电压尖峰进行整流，以产生瞬时直流（DC）电压电源（MVS），为快速瞬态驱动电路供电并跳闸快速瞬态开关。 快速瞬态开关放电瞬态通过元件输入电压（例如，在一些实施例中为MOSFET功率晶体管上的栅极电压）并终止通过通过元件电流通道的电流。
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