公开(公告)号：US11552566B2

公开(公告)日：2023-01-10

申请号：US17176077

申请日：2021-02-15

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Joerg Kirchner ,  Stefan Dietrich ,  Ivan Shumkov ,  Christian Harder

IPC: H02M3/158 ,  H02M1/00

Abstract: To facilitate current sensing for valley current-controlled power converters, an example apparatus includes a comparator having a first terminal, a second terminal, and an output. A first transistor has a first drain coupled to the first terminal of the comparator. A second transistor has a second drain coupled to the first terminal of the comparator. A third transistor has a third drain coupled to the second terminal of the comparator.

公开(公告)号：US20210083583A1

公开(公告)日：2021-03-18

申请号：US17000854

申请日：2020-08-24

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Julian Becker ,  Christian Harder ,  Eduardas Jodka ,  Stefan Dietrich ,  Puneet Sareen

IPC: H02M3/158 ,  H03K5/24 ,  H02M1/14 ,  G05F3/26 ,  G01R19/165

Abstract: A converter operable to convert an input voltage at an input node to an output voltage at an output node coupled to a load by switching on and off a transistor at a switching frequency, the converter comprising: an error amplifier circuit having a first input coupled to a reference voltage, a second input coupled to the output node through a resistive divider, a first output operable to output a control current and a second output operable to output a current equivalent to the control current; a peak current comparator circuit having a first input coupled to the second output of the error amplifier circuit, a second input and an output, the second input is coupled to the input node through an inductor; an off-time timer circuit having an input coupled to the first output of the error amplifier circuit and an output, the off-time timer circuit operable to set the switching frequency based on the control current; and a control circuit having a first input coupled to the output of the peak current comparator circuit, a second input coupled to the output of the off-time timer circuit and an output coupled to a control terminal of the transistor.

公开(公告)号：US10924015B2

公开(公告)日：2021-02-16

申请号：US15990382

申请日：2018-05-25

Applicant: Texas Instruments Incorporated

Inventor： Joerg Kirchner ,  Stefan Dietrich ,  Ivan Shumkov ,  Christian Harder

IPC: H02M3/158 ,  H02M1/00

Abstract: Methods, systems, and apparatus to facilitate current sensing for valley current-controlled power converters are disclosed. An example apparatus includes a comparator including a first terminal, a second terminal, and an output. The apparatus further includes a first transistor including a first drain coupled to the first terminal of the comparator. The apparatus further includes a second transistor including a second drain coupled to the first terminal of the comparator. The apparatus further includes a third transistor including a third drain coupled to the second terminal of the comparator.

公开(公告)号：US20190305676A1

公开(公告)日：2019-10-03

申请号：US16126705

申请日：2018-09-10

Applicant: Texas Instruments Incorporated

Inventor： Stefan Dietrich ,  Joerg Kirchner ,  Ruediger Ganz

IPC: H02M3/137 ,  H02M3/158 ,  G06F1/04

Abstract: A timer for creating a stable on time. The timer may have a reference voltage source, and an input voltage source. The voltage sources providing voltage that can be applied to a various circuit components such as capacitors, inductors, resistors, diodes, transistors, or other components. The reference voltage source may also be modified by a set of transistors coupled as a diode before being seen by an input of a timer comparator. The reference and input voltage source signals, which may be modified by circuit components, are compared by the timer comparator and then output as a timer control signal. The timer control signal may control a voltage converter, or the switches of a voltage converter.