公开(公告)号：US11575314B2

公开(公告)日：2023-02-07

申请号：US17334651

申请日：2021-05-28

Applicant: Texas Instruments Incorporated

Inventor： Saad Pervaiz ,  Sombuddha Chakraborty ,  Philomena Brady ,  Laszlo Balogh

IPC: H02M1/42 ,  H02M3/335 ,  H02M1/08 ,  H02M1/00

Abstract: A controller for a boost power factor correction (PFC) converter. The controller is configured to operate the boost PFC converter in multiple operating modes, including a continuous conduction mode (CCM), a transition mode (TM), and a hybrid mode in which the controller operates the converter in both CCM and TM within a same line cycle. An example controller includes a current control loop and a mode transition circuit. The current control loop is configured to compute an inductor current for each of first and second operation modes, based on a current sample taken, for example, during a boost synchronous rectifier conduction period of the converter. The mode transition circuit includes digital logic circuitry and is configured to generate a pulse indicating that one, two or all three of: zero-voltage switching (ZVS) has been achieved; the synchronous rectifier conduction period is active; and/or one of TM or hybrid mode is active.

公开(公告)号：US20220393574A1

公开(公告)日：2022-12-08

申请号：US17334651

申请日：2021-05-28

Applicant: Texas Instruments Incorporated

Inventor： Saad Pervaiz ,  Sombuddha Chakraborty ,  Philomena Brady ,  Laszlo Balogh

IPC: H02M1/42 ,  H02M1/00 ,  H02M1/08 ,  H02M3/335

Abstract: A controller for a boost power factor correction (PFC) converter. The controller is configured to operate the boost PFC converter in multiple operating modes, including a continuous conduction mode (CCM), a transition mode (TM), and a hybrid mode in which the controller operates the converter in both CCM and TM within a same line cycle. An example controller includes a current control loop and a mode transition circuit. The current control loop is configured to compute an inductor current for each of first and second operation modes, based on a current sample taken, for example, during a boost synchronous rectifier conduction period of the converter. The mode transition circuit includes digital logic circuitry and is configured to generate a pulse indicating that one, two or all three of: zero-voltage switching (ZVS) has been achieved; the synchronous rectifier conduction period is active; and/or one of TM or hybrid mode is active.

公开(公告)号：US20250070656A1

公开(公告)日：2025-02-27

申请号：US18453956

申请日：2023-08-22

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Saad Pervaiz ,  Johan Strydom ,  Maida Farooq ,  Branko Majmunovic

IPC: H02M3/00 ,  H02M1/00 ,  H02M1/38 ,  H02M3/335

Abstract: An apparatus includes a resonant converter controller having a converter voltage sensing terminal, a reference voltage terminal, a converter current sensing terminal, first and second converter capacitor terminals, and first and second control outputs. The resonant converter controller is configured to: receive a current sensing signal at the converter current sensing terminal; generate a first signal based on the current sensing signal; generate a second signal representing a difference between a first voltage at the converter voltage sensing terminal and a reference voltage at the reference voltage terminal; and generate first and second switching signals at, respectively, the first and second control outputs responsive to the first signal, the second signal, and a capacitor voltage between the first and second converter capacitor terminals to regulate the first voltage based on the reference voltage.