公开(公告)号：US11863077B2

公开(公告)日：2024-01-02

申请号：US17539125

申请日：2021-11-30

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Sheng-Yang Yu ,  Lieh-Chung Yin

IPC: H02M3/335 ,  H02M1/08

CPC classification number: H02M3/33573 ,  H02M1/083 ,  H02M3/33576

Abstract: A power supply system includes an input stage comprising first and second input switches to provide a primary current responsive first and second input switching signals. A transformer generates a secondary current responsive to the primary current. An output stage comprises an output, a first output switch, a second output switch and a clamping switch. The output stage can be configured to generate an output voltage at the output by rectifying the secondary current responsive to respective first and second output switching signals. The clamping switch can be configured to close responsive to a clamp switching signal during an activation dead-time between closing the first input switch and the second input switch. The system further includes a switching controller configured to generate the first and second input switching signals and the first and second output switching signals based on the output voltage, and to generate the clamp switching signal.

公开(公告)号：US20210028712A1

公开(公告)日：2021-01-28

申请号：US16938757

申请日：2020-07-24

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Sheng-Yang Yu ,  Manish Bhardwaj

IPC: H02M3/335 ,  H01F30/16 ,  H01F38/38

Abstract: For predictive synchronous rectifier sensing and control, an example apparatus includes an air core toroid having a voltage output, the air core toroid adapted to surround a portion of a current path and adapted to be coupled through the current path to a transformer, and a control logic circuit having a voltage input and a control output, the voltage input coupled to the voltage output, and the control output adapted to be coupled to a switch.

公开(公告)号：US20240275267A1

公开(公告)日：2024-08-15

申请号：US18167319

申请日：2023-02-10

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Shamim Choudhury ,  Sheng-Yang Yu

IPC: H02M1/32 ,  H02M1/00 ,  H02M3/335 ,  H03K17/0812

CPC classification number: H02M1/32 ,  H02M1/0009 ,  H02M3/33573 ,  H02M3/33576 ,  H03K17/08122

Abstract: An electronic system for controlling a power converter having an active clamping circuit includes a current sensor configured to sense current through a primary side of a transformer within the power converter, and a comparator sub-system. The comparator sub-system is configured to receive a transformer current signal from the current sensor and generate a trip signal based on a difference between the transformer current signal and a reference signal. The electronic system also includes a pulse width modulator configured to generate a gate input signal for the active clamping circuit based at least in part on the trip signal.

公开(公告)号：US11437917B2

公开(公告)日：2022-09-06

申请号：US16938757

申请日：2020-07-24

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Sheng-Yang Yu ,  Manish Bhardwaj

IPC: H02M3/335 ,  H01F30/16 ,  G01R15/18 ,  H01F38/38

Abstract: For predictive synchronous rectifier sensing and control, an example apparatus includes an air core toroid having a voltage output, the air core toroid adapted to surround a portion of a current path and adapted to be coupled through the current path to a transformer, and a control logic circuit having a voltage input and a control output, the voltage input coupled to the voltage output, and the control output adapted to be coupled to a switch.