公开(公告)号：US11843320B2

公开(公告)日：2023-12-12

申请号：US17362875

申请日：2021-06-29

Applicant: Texas Instruments Incorporated

Inventor： Ramkumar Sivakumar ,  Brent Alan McDonald ,  Yalong Li

IPC: H02M3/335 ,  H02M1/00

CPC classification number: H02M3/33592 ,  H02M1/0035

Abstract: A method for operating a resonant converter in a burst mode includes determining the polarity of a transformer voltage across a secondary winding of a transformer. The method includes determining, from the polarity of the transformer voltage, on/off states of first and second transistors coupled to the secondary winding of the transformer. If the transformer voltage has a first polarity, the method includes commencing a burst period by alternately turning on/off high-side and low-side transistors electrically connected to a primary winding of the transformer.

公开(公告)号：US20220416676A1

公开(公告)日：2022-12-29

申请号：US17362875

申请日：2021-06-29

Applicant: Texas Instruments Incorporated

Inventor： Ramkumar Sivakumar ,  Brent Alan McDonald ,  Yalong Li

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

Abstract: A method for operating a resonant converter in a burst mode includes determining the polarity of a transformer voltage across a secondary winding of a transformer. The method includes determining, from the polarity of the transformer voltage, on/off states of first and second transistors coupled to the secondary winding of the transformer. If the transformer voltage has a first polarity, the method includes commencing a burst period by alternately turning on/off high-side and low-side transistors electrically connected to a primary winding of the transformer.

公开(公告)号：US11196351B2

公开(公告)日：2021-12-07

申请号：US16727187

申请日：2019-12-26

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Yalong Li ,  Maxim James Franke ,  John C. Vogt ,  Brent Alan McDonald

IPC: H02M3/156 ,  H02M3/337 ,  H02M3/158 ,  H02M3/335 ,  H02M1/00

Abstract: A circuit includes a first driver, a second driver, and a burst mode control circuit coupled to the first and second drivers. The burst mode control circuit is configured to implement a burst mode operation having a burst soft-on portion and a burst portion. During the soft-on portion of the burst mode operation, the burst mode control circuit is configured to cause the first and second drivers to produce a first set of pulses of increasing pulse width. During the burst portion of the burst mode operation, the burst mode control circuit is configured to cause the first and second drivers to produce a second set of pulses of a constant pulse width.