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公开(公告)号：US10579082B2
公开(公告)日：2020-03-03
申请号：US16208159
申请日：2018-12-03
Applicant: TEXAS INSTRUMENTS INCORPORATED
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：US20240219459A1
公开(公告)日：2024-07-04
申请号：US18603071
申请日：2024-03-12
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： HARSH PATEL , Aalok Dyuti Saha , Sanjeev Praphulla Chandra Nyshadham , Subrato Roy , Gaurav Kumar Mittal
CPC classification number: G01R31/3008 , G01R19/2506
Abstract: One example includes a method for measuring a quiescent current in a switching voltage regulator. The method includes generating a mathematical model of a circuit design associated with the switching voltage regulator. The mathematical model includes measurable parameters to describe a switching current of a power switch of the switching voltage regulator. The method also includes fabricating a circuit comprising the switching voltage regulator based on the circuit design. The fabricated circuit includes the power switch and conductive I/O. The method also includes coupling the conductive I/O of the fabricated circuit to a circuit test fixture and providing electrical signals to the conductive I/O via the circuit test fixture. The method also includes measuring the measurable parameters in response to the electrical signals and applying the measurable parameters to the mathematical model to calculate the switching current. The method further includes calculating the quiescent current based on the switching current.
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公开(公告)号：US20230417829A1
公开(公告)日：2023-12-28
申请号：US17846397
申请日：2022-06-22
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： HARSH PATEL , Aalok Dyuti Saha , Sanjeev Praphulla Chandra Nyshadham , Subrato Roy , Gaurav Kumar Mittal
CPC classification number: G01R31/3008 , G01R19/2506
Abstract: One example includes a method for measuring a quiescent current in a switching voltage regulator. The method includes generating a mathematical model of a circuit design associated with the switching voltage regulator. The mathematical model includes measurable parameters to describe a switching current of a power switch of the switching voltage regulator. The method also includes fabricating a circuit comprising the switching voltage regulator based on the circuit design. The fabricated circuit includes the power switch and conductive I/O. The method also includes coupling the conductive I/O of the fabricated circuit to a circuit test fixture and providing electrical signals to the conductive I/O via the circuit test fixture. The method also includes measuring the measurable parameters in response to the electrical signals and applying the measurable parameters to the mathematical model to calculate the switching current. The method further includes calculating the quiescent current based on the switching current.
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Patent Agency Ranking
公开(公告)号：US20250038514A1
公开(公告)日：2025-01-30
申请号：US18775027
申请日：2024-07-17
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Prateek Pandey , Koshal Sharma , Aalok Dyuti Saha
IPC: H02H3/08
Abstract: An apparatus includes a first comparator having first and second inputs, a first control input, an output, and a supply voltage terminal. A second comparator has first and second inputs, a second control input, and an output. The second comparator's first input is coupled to the first input of the first comparator. The second comparator's second input is coupled to the first comparator's second input. A switchover logic circuit has an input, a first output, a second output, and a third output. The input of the switchover logic circuit is coupled to the first inputs of the first and second comparators. The first output of the switchover logic circuit is coupled to the supply voltage terminal of the first comparator. The second output of the switchover logic circuit is coupled to the first control input. The third output of the switchover logic circuit is coupled to the second control input.
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公开(公告)号：US12218572B2
公开(公告)日：2025-02-04
申请号：US17858222
申请日：2022-07-06
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Aalok Dyuti Saha
Abstract: In an example, a system includes a differential amplifier having a first input terminal and a second input terminal, the differential amplifier configured to be coupled to a boost diode of a boost converter. The system also includes an input diode coupled to the first input terminal and the second input terminal. The system includes a pull-up circuit coupled to the input diode and configured to be coupled to the boost diode. The system also includes a pull-down circuit coupled to the pull-up circuit. The system includes a transistor coupled to the pull-up circuit and the pull-down circuit.
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公开(公告)号：US11927624B2
公开(公告)日：2024-03-12
申请号：US17846397
申请日：2022-06-22
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Harsh Patel , Aalok Dyuti Saha , Sanjeev Praphulla Chandra Nyshadham , Subrato Roy , Gaurav Kumar Mittal
CPC classification number: G01R31/3008 , G01R19/2506
Abstract: One example includes a method for measuring a quiescent current in a switching voltage regulator. The method includes generating a mathematical model of a circuit design associated with the switching voltage regulator. The mathematical model includes measurable parameters to describe a switching current of a power switch of the switching voltage regulator. The method also includes fabricating a circuit comprising the switching voltage regulator based on the circuit design. The fabricated circuit includes the power switch and conductive I/O. The method also includes coupling the conductive I/O of the fabricated circuit to a circuit test fixture and providing electrical signals to the conductive I/O via the circuit test fixture. The method also includes measuring the measurable parameters in response to the electrical signals and applying the measurable parameters to the mathematical model to calculate the switching current. The method further includes calculating the quiescent current based on the switching current.
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公开(公告)号：US11243235B2
公开(公告)日：2022-02-08
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：US10917058B2
公开(公告)日：2021-02-09
申请号：US16185591
申请日：2018-11-09
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Aalok Dyuti Saha , Bhaskar Ramachandran
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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