公开(公告)号：US20210119627A1

公开(公告)日：2021-04-22

申请号：US16801746

申请日：2020-02-26

Applicant: Texas Instruments Incorporated

Inventor： Kyoung Min Lee ,  Satish Kumar Vemuri ,  James Michael Walden

IPC: H03K17/567 ,  H02P27/08 ,  H02M7/5387 ,  H02M1/08

Abstract: Gate driver bootstrap circuits and related methods are disclosed. An example gate driver stage includes a first terminal and a second terminal, the first terminal to be coupled to a capacitor, the capacitor and the second terminal to be coupled to a gate terminal of a power transistor, a gate driver coupled to the first terminal and the second terminal, and a bootstrap circuit coupled to the first terminal, the second terminal, and the gate driver, the bootstrap circuit including a control stage circuit having an output and a first transistor having a first gate terminal and a first current terminal, the first gate terminal coupled to the output, the first current terminal coupled to the first terminal.

公开(公告)号：US20180269797A1

公开(公告)日：2018-09-20

申请号：US15987493

申请日：2018-05-23

Applicant: Texas Instruments Incorporated

Inventor： Satish Kumar Vemuri ,  James M. Walden ,  Isaac Cohen

IPC: H02M3/335 ,  H02M1/00

CPC classification number: H02M3/33592 ,  H02M3/33523 ,  H02M2001/0009 ,  Y02B70/1475

Abstract: Disclosed examples include flyback converters, control circuits and methods to facilitate secondary side regulation of the output voltage. A primary side control circuit operates a primary side switch to independently initiate power transfer cycles to deliver power to a transformer secondary winding in a first mode. A secondary side control circuit operates a synchronous rectifier or secondary side switch to generate a predetermined cycle start request signal via a transformer auxiliary winding to assume secondary side regulation and to cause the primary side controller to initiate new power transfer cycles.

公开(公告)号：US12176899B2

公开(公告)日：2024-12-24

申请号：US18507502

申请日：2023-11-13

Applicant: Texas Instruments Incorporated

Inventor： Tuli Luthuli Dake ,  Satish Kumar Vemuri

IPC: H03K19/0175 ,  G01R19/165 ,  H03K3/356 ,  H03K5/22 ,  H03K17/10 ,  H03K19/003 ,  H03K19/0185

Abstract: Techniques are described herein to enhance capability of floating level translators. For example, increased headroom is accomplished by adaptively bypassing the protection elements of the voltage level translator. In an example, a floating level translator can translate an input signal from a low-voltage domain to a high-voltage domain. A bypass circuit is coupled across the protection elements. The bypass circuit selectively engages during low-voltage operation (e.g., thereby providing a lower loss path relative to loss caused by the high-voltage protection elements and thus increasing the headroom swing), and disengages responsive to the high-voltage reference rail of the high-voltage domain exceeding a threshold or otherwise being high enough (e.g., greater than the potential of the low-voltage domain power rail). The bypass circuit can be implemented in a relatively low-complexity manner (e.g., back-to-back high-voltage FETs) without additional signals to control low-voltage capability.

公开(公告)号：US20230387916A1

公开(公告)日：2023-11-30

申请号：US17828797

申请日：2022-05-31

Applicant: Texas Instruments Incorporated

Inventor： Tuli Luthuli Dake ,  Satish Kumar Vemuri

IPC: H03K19/0185 ,  H03K19/003 ,  H03K3/356 ,  H03K17/10

CPC classification number: H03K19/018528 ,  H03K19/00361 ,  H03K3/356113 ,  H03K17/102

Abstract: Techniques are described herein to enhance capability of floating level translators. For example, increased headroom is accomplished by adaptively bypassing the protection elements of the voltage level translator. In an example, a floating level translator can translate an input signal from a low-voltage domain to a high-voltage domain. A bypass circuit is coupled across the protection elements. The bypass circuit selectively engages during low-voltage operation (e.g., thereby providing a lower loss path relative to loss caused by the high-voltage protection elements and thus increasing the headroom swing), and disengages responsive to the high-voltage reference rail of the high-voltage domain exceeding a threshold or otherwise being high enough (e.g., greater than the potential of the low-voltage domain power rail). The bypass circuit can be implemented in a relatively low-complexity manner (e.g., back-to-back high-voltage FETs) without additional signals to control low-voltage capability.

公开(公告)号：US20200099551A1

公开(公告)日：2020-03-26

申请号：US16425536

申请日：2019-05-29

Applicant: Texas Instruments Incorporated

Inventor： Zhidong Liu ,  James Michael Walden ,  Satish Kumar Vemuri

IPC: H04L25/02 ,  G05F3/26 ,  H04L27/227 ,  H01L29/78

Abstract: Methods, systems, and apparatus to increase common-mode transient immunity in isolation devices is disclosed. An example apparatus includes a current mirror including an input terminal and an output terminal; a transistor including a gate terminal, a first current terminal, and a second current terminal, the gate terminal coupled to a reference voltage terminal, the first current terminal coupled to the input terminal of the current mirror, and the second current terminal coupled to an input node; a buffer including an input terminal and an output terminal, the input terminal of the buffer coupled to the output terminal of the current mirror; and a logic gate including an input terminal and an output terminal, the input terminal of the logic gate coupled to the output terminal of the buffer.

公开(公告)号：US10008947B2

公开(公告)日：2018-06-26

申请号：US15202629

申请日：2016-07-06

Applicant: Texas Instruments Incorporated

Inventor： Satish Kumar Vemuri ,  James M. Walden ,  Isaac Cohen

IPC: H02M3/335 ,  H02M1/00

CPC classification number: H02M3/33592 ,  H02M3/33523 ,  H02M2001/0009 ,  Y02B70/1475

Abstract: Disclosed examples include flyback converters, control circuits and methods to facilitate secondary side regulation of the output voltage. A primary side control circuit operates a primary side switch to independently initiate power transfer cycles to deliver power to a transformer secondary winding in a first mode. A secondary side control circuit operates a synchronous rectifier or secondary side switch to generate a predetermined cycle start request signal via a transformer auxiliary winding to assume secondary side regulation and to cause the primary side controller to initiate new power transfer cycles.

公开(公告)号：US20170033698A1

公开(公告)日：2017-02-02

申请号：US15202629

申请日：2016-07-06

Applicant: Texas Instruments Incorporated

Inventor： Satish Kumar Vemuri ,  James M. Walden ,  Isaac Cohen

IPC: H02M3/335 ,  H02M1/08

CPC classification number: H02M3/33592 ,  H02M3/33523 ,  H02M2001/0009 ,  Y02B70/1475

Abstract: Disclosed examples include flyback converters, control circuits and methods to facilitate secondary side regulation of the output voltage. A primary side control circuit operates a primary side switch to independently initiate power transfer cycles to deliver power to a transformer secondary winding in a first mode. A secondary side control circuit operates a synchronous rectifier or secondary side switch to generate a predetermined cycle start request signal via a transformer auxiliary winding to assume secondary side regulation and to cause the primary side controller to initiate new power transfer cycles.

Abstract translation: 公开的示例包括反激式转换器，控制电路和便于次级侧调节输出电压的方法。 初级侧控制电路操作初级侧开关以独立地启动功率传递循环，以在第一模式中将功率输送到变压器次级绕组。 次级侧控制电路操作同步整流器或次级侧开关，以经由变压器辅助绕组产生预定的周期启动请求信号，以实现次级侧调节，并使初级侧控制器启动新的功率传输周期。