公开(公告)号：US11552565B2

公开(公告)日：2023-01-10

申请号：US16860511

申请日：2020-04-28

Applicant: Texas Instruments Incorporated

Inventor： Saurav Bandyopadhyay ,  Thomas Matthew LaBella ,  Huy Le Nhat Nguyen ,  Michael G. Amaro ,  Robert Allan Neidorff

IPC: H02M3/158 ,  G06F1/26 ,  H03K17/082 ,  H02M1/00

Abstract: A switch-mode power supply circuit includes a low-side switching transistor, a high-side switching transistor, a low-side current sensing circuit, and a gate driver circuit. The low-side current sensing circuit is coupled to the low-side switching transistor and is configured to sense a current flowing through the low-side switching transistor. The gate driver circuit is coupled to the low-side current sensing circuit and the high-side switching transistor. The gate driver circuit is configured to generate a signal having a first drive strength to switch the high-side switching transistor based on current flowing through the low-side switching transistor being less than a threshold current, and to generate a signal having a second drive strength to switch the high-side switching transistor based on current flowing through the low-side switching transistor being greater than the threshold current. The first drive strength is greater than the second drive strength.

公开(公告)号：US11038421B2

公开(公告)日：2021-06-15

申请号：US16670638

申请日：2019-10-31

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Thomas Matthew LaBella ,  Michael G. Amaro ,  Jeffrey Anthony Morroni

IPC: H02M3/158 ,  H02M1/00 ,  H02M1/08

Abstract: Timing circuitry causes: a first closed signal on a first switch control output before a signal on a second switch control output changes from a second closed signal to a first open signal; the first switch control output to provide a second open signal after a first selected time after the second switch control output changes from the second closed signal to the first open signal; and a third switch control output to provide a third closed signal a second selected time after the first switch control output changes from the first closed signal to a third open signal. A beginning of the first closed signal to a beginning of the first open signal is based on a later of: a current through a switch connected to the second switch control output exceeding a threshold current; and a clocked time after the beginning of the first closed signal.

公开(公告)号：US20190140541A1

公开(公告)日：2019-05-09

申请号：US16241612

申请日：2019-01-07

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Thomas Matthew LaBella ,  Michael G. Amaro ,  Jeffrey Anthony Morroni

IPC: H02M3/158 ,  H02M1/08

CPC classification number: H02M3/158 ,  H02M1/08 ,  H02M2001/0009 ,  H02M2001/0032 ,  H02M2001/0058 ,  Y02B70/1491 ,  Y02B70/16

Abstract: Timing circuitry causes: a first closed signal on a first switch control output before a signal on a second switch control output changes from a second closed signal to a first open signal; the first switch control output to provide a second open signal after a first selected time after the second switch control output changes from the second closed signal to the first open signal; and a third switch control output to provide a third closed signal a second selected time after the first switch control output changes from the first closed signal to a third open signal. A beginning of the first closed signal to a beginning of the first open signal is based on a later of: a current through a switch connected to the second switch control output exceeding a threshold current; and a clocked time after the beginning of the first closed signal.

公开(公告)号：US09548648B2

公开(公告)日：2017-01-17

申请号：US14318238

申请日：2014-06-27

Applicant: Texas Instruments Incorporated

Inventor： Michael G. Amaro ,  Joseph Maurice Khayat ,  Pradeep S. Shenoy

IPC: H02M3/158 ,  H02M1/08 ,  H02M3/07

CPC classification number: H02M1/08 ,  H02M3/07 ,  H02M3/1584 ,  H02M3/1588 ,  Y02B70/1466

Abstract: A power converter includes at least a first phase including a high-side MOSFET transistor (HSA) and a low-side (LS) MOSFET transistor (LSA) driving a first output inductor. The first phase further includes an active gate drive assist circuit including first MOSFET switch (first switch) and second MOSFET switch (second switch) positioned in series between a source of HSA and a drain of LSA. A capacitor (CS) is between the source of HSA and drain of LSA. A bootstrap capacitor (CA) having a reference terminal is connected to a node between the first switch and the second switch.

Abstract translation: 功率转换器至少包括驱动第一输出电感器的高边MOSFET晶体管（HSA）和低侧（LS）MOSFET晶体管（LSA））的第一相。 第一阶段还包括有源栅极驱动辅助电路，其包括串联在HSA源和LSA漏极之间的第一MOSFET开关（第一开关）和第二MOSFET开关（第二开关）。 电容器（CS）位于HSA的源极和LSA的漏极之间。 具有参考端的自举电容器（CA）连接到第一开关和第二开关之间的节点。