公开(公告)号：US20230133452A1

公开(公告)日：2023-05-04

申请号：US17514951

申请日：2021-10-29

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Puneet SAREEN ,  Narayanan SEETHARAMAN

IPC: H02M3/158 ,  H02M1/00 ,  G05F1/56 ,  G01R19/165 ,  H03K5/24

Abstract: In an example, a system includes a switching voltage converter including a first field effect transistor (FET) and a second FET, the switching voltage converter configured to receive an input voltage and provide an output voltage. The system also includes a voltage to current converter coupled to the switching voltage converter and an oscillator, the voltage to current converter configured to receive an error voltage of the output voltage and provide an oscillator current to the oscillator. The system includes a comparator coupled to the oscillator and configured to compare the oscillator current to a reference current, where an output of the comparator is configured to skip a pulse of an oscillator output responsive to the oscillator current being less than the reference current.

公开(公告)号：US20240006992A1

公开(公告)日：2024-01-04

申请号：US17853287

申请日：2022-06-29

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Narayanan SEETHARAMAN ,  Puneet SAREEN

IPC: H02M3/158

CPC classification number: H02M3/158

Abstract: A DC-DC converter circuit includes an error amplifier, a comparator, an oscillator, and a control circuit. The error amplifier is configured to generate an error signal. The control circuit is coupled to the error amplifier, the comparator, and the oscillator. The control circuit is configured to generate an oscillator control signal to control a frequency of the oscillator based on the error signal, and to generate a peak control signal provided to the comparator based on the error signal. The control circuit is also configured to switch, based on the error signal, between a first modulation mode and a second modulation mode during a transition mode, and in the transition mode, generate the oscillator control signal based on the peak control signal and the error signal.

公开(公告)号：US20220109371A1

公开(公告)日：2022-04-07

申请号：US17490764

申请日：2021-09-30

Applicant: Texas Instruments Incorporated

Inventor： Narayanan SEETHARAMAN ,  Julian Leonhard BECKER FERREIRA ,  Puneet SAREEN ,  Stefan DIETRICH

IPC: H02M3/158 ,  H02M1/00 ,  H03K3/0233

Abstract: A DC-DC converter includes an output terminal, a reference voltage source, an error amplifier, and a compensation circuit. The error amplifier is coupled to the output terminal and the reference voltage source. The error amplifier is configured to generate an error signal representative of a difference between a voltage at the output terminal and a reference voltage provided by the reference voltage source. The compensation circuit is coupled to the error amplifier. The compensation circuit includes a resistor, a capacitor, and a switch control circuit. The resistor is coupled to the error amplifier. The capacitor is coupled to the resistor. The switch control circuit is configured to modulate connection of the resistor to the capacitor based on a switching frequency of the DC-DC converter.

公开(公告)号：US20230170798A1

公开(公告)日：2023-06-01

申请号：US17537802

申请日：2021-11-30

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Puneet SAREEN ,  Michael KÄNNER ,  Christian HARDER ,  Narayanan SEETHARAMAN

IPC: H02M3/157 ,  H02M1/00

CPC classification number: H02M3/157 ,  H02M1/0041

Abstract: A switching converter controller includes: a stopband controller having a stopband controller input and a stopband controller output, the stopband controller is configured to provide stopband information at the stopband controller output responsive to a reference signal; a pulse-frequency modulation (PFM) controller having a first PFM controller input, a second PFM controller input and a PFM controller output, the first PFM controller input configured to receive a feedback error signal, the second PFM controller input coupled to the stopband controller output, and the PFM controller configured to selectively adjust a clock signal at the PFM controller output based on the feedback error signal and the stopband information; and a driver circuit having a driver circuit input coupled to the PFM controller output and configured to receive the clock signal, and having a driver circuit output adapted to be coupled to a power stage switch.

公开(公告)号：US20190305738A1

公开(公告)日：2019-10-03

申请号：US15940812

申请日：2018-03-29

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Niko BAKO ,  Narayanan SEETHARAMAN

IPC: H03F3/45

Abstract: A circuit includes a first common mode amplifier including a first input, a second input, and a first output. The first common mode amplifier comprises a first plurality of self-based differential amplifiers. The circuit also includes a second common mode amplifier including a third input, a fourth input, and a second output, The third input is connected to the second input and the fourth input is connected to the first input. The second common amplifier comprises a second plurality of self-based differential amplifiers. The circuit further includes a first gain amplifier including a fifth input and a sixth input and a second gain amplifier including a seventh input and an eighth input. The first output is connected to the fifth and eight inputs and the second output is connected to the sixth and seventh inputs.