公开(公告)号：US20230318473A1

公开(公告)日：2023-10-05

申请号：US17822852

申请日：2022-08-29

Applicant: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC

Inventor： Roman MAZGUT ,  Tomas TICHY

IPC: H02M3/335 ,  H02M1/08 ,  H02M3/00

CPC classification number: H02M3/33592 ,  H02M1/08 ,  H02M3/01

Abstract: Systems for power conversion, and controllers and methods for operating a power converter. The method includes receiving high-side and low-side primary signals that drive primary transistors of a power converter. The method also includes receiving a combined drain voltage signal for high-side and low-side synchronous rectifier (SR) transistors of the power converter. The method further includes generating a high-side SR signal based on the low-side primary signal and generating a low-side SR signal based on the high-side primary signal. The method also includes determining high-side and low-side body diode conduction times based on the combined drain voltage signal. The method further includes adjusting the high-side SR signal based on the high-side body diode conduction time and adjusting the low-side SR signal based on the low-side body diode conduction time.

公开(公告)号：US20180323719A1

公开(公告)日：2018-11-08

申请号：US16039521

申请日：2018-07-19

Applicant: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC

Inventor： Karel PTACEK ,  Tomas TICHY

IPC: H02M3/335 ,  H02M1/08 ,  H02M1/00

CPC classification number: H02M3/33523 ,  H02M1/08 ,  H02M3/33592 ,  H02M2001/0009 ,  Y02B70/1475

Abstract: A synchronous rectifier controller includes an exception timer, one or more blanking timers, and control logic. The control logic may detect a beginning of a conduction phase using a current sense signal. In response to detecting the beginning of the conduction phase, the control logic commences the exception timer, commences a first blanking interval, and asserts the drive signal. In response to an OFF condition being detected, the first blanking interval being elapsed, and the exception timer being running, the control logic de-asserts the drive signal and commences a second blanking interval. In response to an ON condition being detected, the second blanking interval being elapsed, and the exception timer being running, the control logic commences a third blanking interval and asserts the drive signal. The control logic may assert and de-assert the drive signal multiple times while the exception timer is running.

公开(公告)号：US20170317598A1

公开(公告)日：2017-11-02

申请号：US15143239

申请日：2016-04-29

Applicant: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC

Inventor： Karel PTACEK ,  Tomas TICHY

IPC: H02M3/335 ,  H02M1/08 ,  H02M1/00

CPC classification number: H02M3/33523 ,  H02M1/08 ,  H02M3/33592 ,  H02M2001/0009

Abstract: A power conversion circuit including an SR MOSFET is provided. A minimum off-time timer for the SR MOSFET is started. A voltage potential at a first terminal of the SR MOSFET is measured. The SR MOSFET is turned on after a rate of change over time of the voltage potential exceeds a first threshold and before the minimum off-time timer expires.

公开(公告)号：US20210119548A1

公开(公告)日：2021-04-22

申请号：US16948417

申请日：2020-09-17

Applicant: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC

Inventor： Dhruv CHOPRA ,  Tomas TICHY

IPC: H02M3/335

Abstract: Synchronous rectification in active clamp flyback power converters. At least some example embodiments are methods including: sensing a first slope of voltage on a secondary winding of the transformer, the first slope indicative of the power converter entering a charge mode of the transformer; modifying, responsive the sensing, an operational state of a secondary rectifier (SR), driver coupled to a secondary rectifier; making the secondary rectifier conductive by the SR driver during a discharge mode of the transformer; sensing a second slope of voltage on the secondary of the transformer, the second slope indicative of ending of the discharge mode of the power converter; and then returning, responsive to sensing the second slope, the SR driver to an original operational state.

公开(公告)号：US20180054132A1

公开(公告)日：2018-02-22

申请号：US15802623

申请日：2017-11-03

Applicant: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC

Inventor： Karel PTACEK ,  Tomas TICHY

IPC: H02M3/335 ,  H02M1/08 ,  H02M1/00

CPC classification number: H02M3/33523 ,  H02M1/08 ,  H02M3/33592 ,  H02M2001/0009

Abstract: A synchronous rectifier controller includes an exception timer, one or more blanking timers, and control logic. The control logic may detect a beginning of a conduction phase using a current sense signal. In response to detecting the beginning of the conduction phase, the control logic commences the exception timer, commences a first blanking interval, and asserts the drive signal. In response to an OFF condition being detected, the first blanking interval being elapsed, and the exception timer being running, the control logic de-asserts the drive signal and commences a second blanking interval. In response to an ON condition being detected, the second blanking interval being elapsed, and the exception timer being running, the control logic commences a third blanking interval and asserts the drive signal. The control logic may assert and de-assert the drive signal multiple times while the exception timer is running.

公开(公告)号：US20160204701A1

公开(公告)日：2016-07-14

申请号：US14596980

申请日：2015-01-14

Applicant: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC

Inventor： Karel PTACEK ,  Tomas TICHY

IPC: H02M3/158

CPC classification number: H02M3/1588 ,  Y02B70/1466

Abstract: A switched mode power supply, in some embodiments, comprises a synchronous rectification transistor switch including a gate, and it further comprises an output driver coupled to the gate and providing a driving signal to the gate. The driving signal is determined based on a dynamically controllable clamp signal and a prior driving signal.

Abstract translation: 在一些实施例中，开关模式电源包括包括栅极的同步整流晶体管开关，并且还包括耦合到栅极并向栅极提供驱动信号的输出驱动器。 驱动信号基于可动态控制的钳位信号和先前的驱动信号来确定。