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1.发明申请公开(公告)号：US20200012304A1
公开(公告)日：2020-01-09
申请号：US16208159
申请日：2018-12-03
Applicant: TEXAS INSTRUMENTS INCORPORATED
IPC: G05F1/573 , G05F1/567 , G05D23/20 , G01R19/165
Abstract: An apparatus includes a power transistor to conduct a load current from a supply voltage node to an output node and a current sense circuit coupled to the power transistor. The current sense circuit generates a current sense current proportional to the load current. A temperature sense circuit is included to generate a temperature sense voltage proportional to the temperature of the power FET. A thermal limit circuit is coupled to the temperature sense circuit. A current limit circuit is coupled to the current sense circuit and to the thermal limit circuit. The current limit circuit generates a control signal on a current limit circuit output node. The control signal is responsive to the current sense current and to a first current from the thermal limit circuit. The current limit circuit output node is coupled to a control input of the power transistor.
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公开(公告)号：US20220271664A1
公开(公告)日：2022-08-25
申请号：US17678220
申请日：2022-02-23
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Vishnuvardhan Reddy JALADANKI , Preetam Charan Anand TADEPARTHY , Scott RAGONA , Rengang CHEN , Evan Michael REUTZEL , Bhaskar RAMACHANDRAN
Abstract: A device includes a current mirror, a switch, first and second current paths, first and second buffers, a variable resistor, a temperature-sensing circuit, and a controller. The first current path is coupled between the current mirror's input and the switch. The switch switches between ground and a transistor based on a control signal. The second current path is coupled between a first current mirror output and ground. The first buffer is coupled to a second current mirror output. The second buffer is coupled to the variable resistor, which is coupled to the first buffer. The temperature-sensing circuit provides a device temperature to the controller, which is coupled to a first buffer output and determines a first adjustment to the first and second current paths and a second adjustment to the variable resistor based on the device temperature.
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公开(公告)号：US20230400490A1
公开(公告)日：2023-12-14
申请号：US17899110
申请日：2022-08-30
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Rengang CHEN , Bo WANG , Evan REUTZEL , Dattatreya Baragur SURYANARAYANA , Bhaskar RAMACHANDRAN , Preetam TADEPARTHY
CPC classification number: G01R27/2611 , H02M1/08 , H02M1/0009 , H02M3/1584
Abstract: In an example, a circuit includes an emulated current generator configured to provide an emulated current signal responsive to a charge current and a discharge current. The emulated current signal can be representative of an emulated current through an output inductor. A comparator is configured to provide a comparator signal responsive to the emulated current signal and sensed current signal representative of a measure of current through the output inductor. An inductor code counter is configured to adjust an inductor code count value responsive to the comparator signal. A slope of the emulated current signal can be adjusted responsive to the inductor code count value.
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公开(公告)号：US20200014347A1
公开(公告)日：2020-01-09
申请号：US16185591
申请日：2018-11-09
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Aalok Dyuti SAHA , Bhaskar RAMACHANDRAN
IPC: H03F3/45
Abstract: A servo-amplifier includes a first bipolar transistor, a second bipolar transistor, a cascode transistor, and a bias transistor. The second bipolar transistor includes an emitter terminal that is connected to an emitter terminal of the first bipolar transistor to form a differential amplifier. The cascode transistor includes a source terminal that is connected to a collector terminal of the first bipolar transistor. The bias transistor is coupled to the first bipolar transistor, the second bipolar transistor and the cascode transistor. The bias transistor is configured to generate a bias voltage to drive a gate terminal of the cascode transistor based on a voltage at a base terminal of the first bipolar transistor and a voltage at a base terminal of the second bipolar transistor. As a result, neither of the bipolar transistors enters a saturation region during transient or steady state operation.
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Patent Agency Ranking
公开(公告)号：US20200011906A1
公开(公告)日：2020-01-09
申请号：US16230564
申请日：2018-12-21
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Bhaskar RAMACHANDRAN , Kushal D. MURTHY , Aalok Dyuti SAHA
IPC: G01R19/165 , G01R19/155
Abstract: A device includes a first transistor coupled to an input voltage source and to an output voltage node and an amplifier comprising a first input, a second input, and an output. The device also includes a second transistor coupled to the input voltage source and the first input of the amplifier and a third transistor coupled to the second transistor and a ground node. The third transistor includes a control terminal coupled to the output of the amplifier. The device also includes a first voltage-controlled voltage source coupled to a control terminal of the first transistor and a control terminal of the second transistor and a second voltage-controlled voltage source coupled to the first transistor and the second input of the amplifier.
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公开(公告)号：US20250105742A1
公开(公告)日：2025-03-27
申请号：US18973263
申请日：2024-12-09
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Rengang CHEN , Bo WANG , Evan REUTZEL , Dattatreya Baragur SURYANARAYANA , Bhaskar RAMACHANDRAN , Preetam TADEPARTHY
Abstract: A circuit includes a current emulation circuit having an output and a current measurement circuit having an input and an output. The circuit also includes a first switch having a first terminal and a second terminal, the first terminal coupled to the output of the current measurement circuit and a second switch having a first terminal and a second terminal, the first terminal coupled to the output of the current emulation circuit and the second terminal coupled to the second terminal of the first switch. Additionally, the circuit includes a third switch having a first terminal and a second terminal, the first terminal coupled to the first terminal of the first switch and the second terminal coupled to the first terminal of the second switch.
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公开(公告)号：US20240039406A1
公开(公告)日：2024-02-01
申请号：US17875214
申请日：2022-07-27
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Rengang CHEN , Bo WANG , Evan REUTZEL , Dattatreya Baragur SURYANARAYANA , Bhaskar RAMACHANDRAN , Preetam TADEPARTHY
CPC classification number: H02M3/158 , H02M1/0009
Abstract: A DC-DC converter includes a current sense circuit. The current sense circuit includes a sense current output, an inductor current measurement circuit, an inductor current emulation circuit, a first switch, and a second switch. The inductor current measurement circuit has an output. The inductor current emulation circuit has an output. The first switch is coupled between the output of the inductor current measurement circuit and the sense current output. The second switch is coupled between the output of the inductor current emulation circuit and the sense current output.
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公开(公告)号：US20200014192A1
公开(公告)日：2020-01-09
申请号：US16503113
申请日：2019-07-03
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Bhaskar RAMACHANDRAN , Dattatreya BARAGUR SURYANARAYANA , Vishal GUPTA
IPC: H02H3/38 , G01R19/165 , H02J7/34 , H02M3/07
Abstract: A system includes a first transistor having a first control input and first and second current terminals. The first current terminal couples to an input voltage node. A second transistor has a second control input and third and fourth current terminals. The third current terminal couples to the second current terminal at a first node. The fourth current terminal couples to an output voltage node. A drive circuit is configured to charge a capacitor maintain the first transistor in an off state responsive to a negative voltage on the input voltage node, and, responsive to a negative voltage on the input voltage node, to cause the charge from the capacitor to be used to turn off the first transistor. The system provides a voltage to a load coupled to the output voltage node.
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公开(公告)号：US20200011917A1
公开(公告)日：2020-01-09
申请号：US16409119
申请日：2019-05-10
Applicant: Texas Instruments Incorporated
Inventor： Bhaskar RAMACHANDRAN , Kushal D. MURTHY
IPC: G01R31/02 , H03K17/0814
Abstract: In described examples, a circuit includes a first driver. The first driver is coupled to a first node, and the first node is coupled to an output pin. A second driver is coupled to a second node, and the second node is coupled to a first voltage terminal. A comparator is coupled to the first node and the second node. A sustaining driver is coupled to the comparator and provides a threshold current to each of the first node and the second node when a short is detected at the output pin.
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