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公开(公告)号：US10439482B2
公开(公告)日：2019-10-08
申请号：US15713204
申请日：2017-09-22
Applicant: TEXAS INSTRUMENTS INCORPORATED
Abstract: In an embodiment, an adaptive drive strength switching converter includes a driver and a control loop coupled to the driver. In an embodiment, the control loop includes a peak detector, a comparator coupled to an output of the peak detector, a counter coupled to an output of the comparator, and a digital-to-analog converter (DAC) coupled to an output of the comparator.
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公开(公告)号：US20190207519A1
公开(公告)日：2019-07-04
申请号：US15859031
申请日：2017-12-29
Applicant: Texas Instruments Incorporated
Inventor： Sombuddha Chakraborty , Jeffery Lee Nilles , Mervin John , Farzad Sahandiesfanjani , Yogesh Kumar Ramadass
CPC classification number: H02M3/1588 , H02M1/088 , H02M1/32 , H02M1/36 , H02M3/158 , H02M2001/0022 , H02M2001/0048 , H02M2001/0054
Abstract: In described examples, a DC-DC converter provides electrical power. In response to an input voltage falling below a high voltage operation threshold, the converter repeatedly performs a first normal (N) phase and a second N phase. The first N phase includes delivering power through an inductor from the input voltage. The second N phase includes coupling an input terminal of the inductor to a ground. In response to the input voltage rising above a normal operation threshold, the converter performs a first high voltage (HV) phase, then a second HV phase, then a third HV phase, then the second HV phase, and then repeats from the first HV phase. The first HV phase includes delivering power through the inductor from the input voltage and charging a flying capacitor. The second HV phase includes coupling the input terminal of the inductor to the ground. The third HV phase includes delivering power through the inductor by discharging the flying capacitor through the inductor.
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公开(公告)号：US20170317674A1
公开(公告)日：2017-11-02
申请号：US15653562
申请日：2017-07-19
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Yogesh Kumar Ramadass
IPC: H03K17/687
CPC classification number: H03K17/687 , H03K17/162 , H03K17/567 , H03K2217/0036
Abstract: Embodiment of the inventive subject matter include an apparatus comprising a first switch, a second switch, a third switch, and a transistor. The first switch is coupled to a first voltage device and the transistor to selectively electrically connect the first voltage device to the transistor to provide a first charge to the transistor. The second switch is coupled to a second voltage device and the transistor to selectively electrically connect the second voltage device to the transistor to remove charge from the transistor. The third switch is coupled to the third voltage device and the transistor to selectively couple the third voltage device to the transistor to provide a second charge to the transistor.
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公开(公告)号：US20240088878A1
公开(公告)日：2024-03-14
申请号：US18512158
申请日：2023-11-17
Applicant: Texas Instruments Incorporated
Inventor： Yinglai Xia , Shailendra Kumar Baranwal , Yogesh Kumar Ramadass , Junmin Jiang
CPC classification number: H03K4/08 , H03F3/2173 , H03L7/081 , H03L7/0891 , H03L7/099 , H03F2200/03 , H03K19/20
Abstract: In one example, an apparatus comprises a power stage having a first power stage input, a second power stage input, and a power stage output. The apparatus also comprises a modulator circuit having a first ramp input, a second ramp input, a modulator input, a first modulator output, and a second modulator output, the first modulator output coupled to the first power stage input, and the second modulator output coupled to the second power stage input. The apparatus also comprises a multi-level ramp generator having a first ramp output and a second ramp output, the first ramp output coupled to the first ramp input, and the second ramp output coupled the second ramp input.
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公开(公告)号：US11824543B2
公开(公告)日：2023-11-21
申请号：US17832280
申请日：2022-06-03
Applicant: Texas Instruments Incorporated
Inventor： Yinglai Xia , Shailendra Kumar Baranwal , Yogesh Kumar Ramadass , Junmin Jiang
CPC classification number: H03K4/08 , H03F3/2173 , H03L7/081 , H03L7/0891 , H03L7/099 , H03F2200/03 , H03K19/20
Abstract: A device includes a first ramp generator having a first ramp generator output configured to provide a first ramp, a second ramp generator having a second ramp generator output configured to provide a second ramp, and a third ramp generator having a third ramp generator output configured to provide a third ramp. The first ramp is a sawtooth voltage waveform having a first common mode voltage and a first peak-to-peak voltage. The second ramp is a sawtooth voltage waveform having a second common mode voltage and a second peak-to-peak voltage. The third ramp is a sawtooth voltage waveform having a third common mode voltage and a third peak-to-peak voltage. A frequency of the second ramp is approximately equal to a frequency of the third ramp, and the frequency of the third ramp is approximately double a frequency of the first ramp.
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Patent Agency Ranking
公开(公告)号：US20230065567A1
公开(公告)日：2023-03-02
申请号：US17461495
申请日：2021-08-30
Applicant: Texas Instruments Incorporated
Inventor： Shailendra Kumar Baranwal , Yogesh Kumar Ramadass , Yinglai Xia
Abstract: Described embodiments include an audio amplifier circuit that includes a first amplifier having a differential first amplifier input adapted to be coupled to an audio input source, a multiplexer having first and second mux inputs, a control input and a mux output. The first mux input is coupled to the differential amplifier output. There is a signal generator having a generator input coupled to the mux output. There is also a driver circuit having a driver circuit input and a driver circuit output, the driver circuit input coupled to the generator output, and a second amplifier having a first error input coupled to a current sense terminal that is configured to provide a voltage proportional to a current supplied from a power supply terminal, and a second error input coupled to a current limit terminal configured to provide a reference voltage proportional to a current limit value.
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公开(公告)号：US11502619B1
公开(公告)日：2022-11-15
申请号：US17389926
申请日：2021-07-30
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Orlando Lazaro , Yogesh Kumar Ramadass , Nan Xing
Abstract: A method includes charging a capacitor of a power inverter to a direct current (DC) input voltage provided at an input terminal of the power inverter. The capacitor has a first terminal and a second terminal. The method also includes providing a first voltage at an output terminal of the power inverter at a first time by controlling one of either a set of input switches configured to selectively couple the first and second terminals to either the input terminal or to a ground terminal, or an output switch configured to selectively couple the output terminal to either the first terminal or the second terminal. The method further includes providing a second voltage at the output terminal at a second time by controlling the other of the set of input switches and the output switch.
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公开(公告)号：US11463000B2
公开(公告)日：2022-10-04
申请号：US17138660
申请日：2020-12-30
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Ashish Kumar , Haoquan Zhang , Yogesh Kumar Ramadass
Abstract: Capacitively isolated current-loaded or current-driven charge pump circuits and related methods transfer electrical energy from a primary side to a secondary side over a capacitive isolation boundary, using a controlled current source to charge isolation capacitors with constant current, as opposed to current impulses, while maintaining output voltage within tolerance. The charge pump circuits provide DC-to-DC converters that can be used in isolated power supplies, particularly in low-power applications and in such devices as sensor transmitters that have separate electrical ground planes. The devices and methods transfer electrical energy over an isolated capacitive barrier in a manner that is efficient, inexpensive, and reduces electromagnetic interference (EMI).
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公开(公告)号：US20210313891A1
公开(公告)日：2021-10-07
申请号：US16840087
申请日：2020-04-03
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Sombuddha Chakraborty , Hakan Oner , Yogesh Kumar Ramadass
Abstract: Described systems, methods, and circuitries use an interleaved multi-level converter to convert an input signal received at an input node into an output signal at an output node. In one example, a power conversion system includes a first multi-level switching circuit, a second multi-level switching circuit, and a control circuit. The first multi-level switching circuit and the second multi-level switching circuit are coupled to a switching node, the input node, and a reference node. The control circuit is configured to generate, based on the output signal, switching control signals as pulse width modulated signals having a duty cycle to control the output signal and provide the switching control signals to the first multi-level switching circuit and the second multi-level switching circuit.
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公开(公告)号：US10727758B2
公开(公告)日：2020-07-28
申请号：US16225083
申请日：2018-12-19
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Yogesh Kumar Ramadass , Andres Arturo Blanco
Abstract: A capacitor-drop power supply includes a rectifier and a rectifier controller. The rectifier is configured to receive an alternating current (AC) signal at an AC voltage and convert the AC signal into a rectified direct current (DC) signal at a rectified voltage. The rectifier includes a first low side switch. The rectifier controller is configured to generate a switch close signal based on the rectified DC signal. The switch close signal is configured to close the first low side switch shunting the AC signal to ground.
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