公开(公告)号：US11824345B2

公开(公告)日：2023-11-21

申请号：US17011522

申请日：2020-09-03

Applicant: Texas Instruments Incorporated

Inventor： Yogesh Kumar Ramadass ,  Ujwal Radhakrishna ,  Jeffrey Morroni

IPC: H02H7/20 ,  H03K17/687 ,  H01L23/525

CPC classification number: H02H7/20 ,  H01L23/5256 ,  H03K17/6871

Abstract: An example integrated circuit includes: a substrate and a first metal fuse layer on the substrate, the first metal fuse layer having first and second electrical contacts, the first electrical contact adapted to be coupled to an input terminal, the second electrical contact adapted to be coupled to a diode. The example integrated circuit further includes a second metal fuse layer on the substrate, the second metal fuse layer having third and fourth electrical contacts, the third electrical contact coupled to the second electrical contact and adapted to be coupled to the diode, the fourth electrical contact coupled to a shunt circuit.

公开(公告)号：US11791714B2

公开(公告)日：2023-10-17

申请号：US16704093

申请日：2019-12-05

Applicant: Texas Instruments Incorporated

Inventor： Nachiket Venkappayya Desai ,  Yogesh Kumar Ramadass

IPC: H02M1/36 ,  H02M3/335

CPC classification number: H02M1/36 ,  H02M3/33507 ,  H02M3/33523

Abstract: A circuit includes a transformer configured with a primary winding and a secondary winding that are driven from a voltage supplied by a thermoelectric generator (TEG). The circuit includes a bipolar startup stage (BSS) coupled to the transformer to generate an intermediate voltage. The BSS includes a first transistor device coupled in series with the primary winding of the transformer to form an oscillator circuit with an inductance of the secondary winding when the voltage supplied by the TEG is positive. A second transistor device coupled to the secondary winding of the transformer enables the oscillator circuit to oscillate when the voltage supplied by the TEG is negative. After startup, a flyback converter stage can be enabled from the intermediate voltage to generate a boosted regulated output voltage.

公开(公告)号：US11606849B2

公开(公告)日：2023-03-14

申请号：US16457768

申请日：2019-06-28

Applicant: Texas Instruments Incorporated

Inventor： Yongbin Chu ,  Yogesh Kumar Ramadass ,  Jeffrey Anthony Morroni

IPC: H05B45/36 ,  H02M1/44 ,  H02M3/158 ,  H05B45/10 ,  H05B45/3725

Abstract: In described examples, a system (e.g., a light-emitting diode dimmer system) includes a switching device coupled to a switching controller. The switching controller generates a control signal, which includes a low frequency signal (e.g., for controlling a dimming function) and a switching signal. An active electromagnetic interference filter (AEF) is coupled to the DC source. An active shunt is coupled to a power input node of the switching device and is configured to selectively couple a shunt current to the power input node of the switching device in synchronization with the low frequency signal (e.g., which can reduce, if not also eliminate, a saturation time of the AEF and improve the performance of the AEF).

公开(公告)号：US11368089B2

公开(公告)日：2022-06-21

申请号：US16840087

申请日：2020-04-03

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Sombuddha Chakraborty ,  Hakan Oner ,  Yogesh Kumar Ramadass

IPC: H02M3/158 ,  H02M1/00 ,  H02M7/483 ,  H02M3/157

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.

公开(公告)号：US11356082B2

公开(公告)日：2022-06-07

申请号：US17119604

申请日：2020-12-11

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Yinglai Xia ,  Shailendra Kumar Baranwal ,  Yogesh Kumar Ramadass ,  Junmin Jiang

IPC: H03K4/08 ,  H03L7/089 ,  H03L7/099 ,  H03F3/217 ,  H03L7/081 ,  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.

公开(公告)号：US10826403B1

公开(公告)日：2020-11-03

申请号：US16566240

申请日：2019-09-10

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Yogesh Kumar Ramadass ,  Ashish Kumar

IPC: H02M3/335 ,  H02M1/088 ,  H02M1/00

Abstract: A system includes an input voltage supply and a switching converter coupled to the input voltage supply. The switching converter includes a transformer having a primary coil and a secondary coil. The switching converter also includes a Y-rated capacitor with a top plate and a bottom plate, wherein the top plate is coupled to a first end of the secondary coil. The switching converter also includes a push-pull current source coupled to the bottom plate of the Y-rated capacitor. The switching converter also includes a controller coupled to the push-pull current source.

公开(公告)号：US10784777B2

公开(公告)日：2020-09-22

申请号：US16224457

申请日：2018-12-18

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Yogesh Kumar Ramadass ,  Jeffrey Morroni

IPC: H02M3/07 ,  H02M1/00 ,  H02M7/219

Abstract: A capacitor-drop power supply includes a rectifier and a switched capacitor converter coupled to the rectifier. 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 switched capacitor converter is configured to receive the rectified DC signal and generate a converter output signal at a converter voltage that is proportional to the rectified voltage and that is less than the AC voltage.

公开(公告)号：US10148312B2

公开(公告)日：2018-12-04

申请号：US15072735

申请日：2016-03-17

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Theodore Ernest Yu ,  Yogesh Kumar Ramadass

IPC: H04B1/00 ,  H04B1/69

Abstract: A method of generating a spread spectrum signal is disclosed. The method includes selecting a first pseudorandom slope for a modulation curve. A current frequency on the modulation curve is selected. An oscillating signal is produced at the current frequency for a respective time. The current frequency is set to a next frequency on the modulation curve. The steps of producing an oscillating frequency and setting the current frequency to a next frequency are repeated until the current frequency is a final frequency on the modulation curve.

公开(公告)号：US09966838B2

公开(公告)日：2018-05-08

申请号：US14180945

申请日：2014-02-14

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Nachiket Venkappayya Desai ,  Yogesh Kumar Ramadass

IPC: H02M3/335 ,  H02M1/36

CPC classification number: H02M1/36 ,  H02M3/33507 ,  H02M3/33523

Abstract: A circuit includes a transformer configured with a primary winding and a secondary winding that are driven from a voltage supplied by a thermoelectric generator (TEG). The circuit includes a bipolar startup stage (BSS) coupled to the transformer to generate an intermediate voltage. The BSS includes a first transistor device coupled in series with the primary winding of the transformer to form an oscillator circuit with an inductance of the secondary winding when the voltage supplied by the TEG is positive. A second transistor device coupled to the secondary winding of the transformer enables the oscillator circuit to oscillate when the voltage supplied by the TEG is negative. After startup, a flyback converter stage can be enabled from the intermediate voltage to generate a boosted regulated output voltage.

公开(公告)号：US09780661B2

公开(公告)日：2017-10-03

申请号：US14926555

申请日：2015-10-29

Applicant: Texas Instruments Incorporated

Inventor： Sombuddha Chakraborty ,  Yogesh Kumar Ramadass

IPC: H02M3/156 ,  H02M3/158 ,  H02M1/08 ,  H02M3/06 ,  H02M1/00 ,  H02M3/07

CPC classification number: H02M3/158 ,  H02M1/08 ,  H02M3/06 ,  H02M3/156 ,  H02M3/1588 ,  H02M2001/0009 ,  H02M2003/072 ,  H02M2003/1566

Abstract: Switch mode power supplies and integrated circuits are presented to provide a DC output voltage signal using high and low side switches, with a switching control circuit to turn off the high side switch and engage an active shunt circuit to provide a reduced voltage to continue converter operation to accommodate high input voltage transients when the DC input voltage exceeds a threshold voltage without requiring an oversized low side switch for improved efficiency through reduced switching and conduction losses in normal operation.