公开(公告)号：US20230213591A1

公开(公告)日：2023-07-06

申请号：US17728551

申请日：2022-04-25

Applicant: Delta Electronics, Inc.

Inventor： Ming-Shi HUANG ,  Zheng-Feng LI ,  Jhih-Cheng HU ,  Yi-Liang LIN ,  Yu-Min MENG ,  Chun-Wei LIN ,  Chun CHANG ,  Thiam-Wee TAN

IPC: G01R31/40 ,  G05F1/10 ,  H02M1/00 ,  H02M1/12

CPC classification number: G01R31/40 ,  G05F1/10 ,  H02M1/0009 ,  H02M1/12

Abstract: A power detection circuit is provided for detecting current total input power of a resonant circuit. The power detection circuit includes a detection circuit and an estimation circuit. The detection circuit receives a current signal and obtains resonant-slot baseband power according to the current signal to generate the baseband power value. The current signal represents a resonant-slot current generated by the resonant circuit. The estimation circuit receives the baseband power value and estimates the current total input power according to the baseband power value to generate an estimated power value.

公开(公告)号：US20240113615A1

公开(公告)日：2024-04-04

申请号：US18112733

申请日：2023-02-22

Applicant: DELTA ELECTRONICS, INC.

Inventor： Chun-Hao HUANG ,  Chun-Wei LIN ,  I-Hsiang SHIH ,  Ching-Nan WU ,  Jia-Wei YEH

IPC: H02M1/42 ,  H02M1/00

CPC classification number: H02M1/4216 ,  H02M1/0009 ,  H02M1/4233

Abstract: A Totem Pole PFC circuit includes at least one fast-switching leg, a slow-switching leg, and a control unit. Each fast-switching leg includes a fast-switching upper switch and a fast-switching lower switch. The slow-switching leg is coupled in parallel to the at least one fast-switching leg, and the slow-switching leg includes a slow-switching upper switch and a slow-switching lower switch. The control unit receives an AC voltage with a phase angle, and the control unit includes a current detection loop, a voltage detection loop, and a control loop. The control loop generates a second control signal assembly to respectively control the slow-switching upper switch and the slow-switching lower switch. The control loop controls the second control signal assembly to follow the phase angle, and dynamically adjusts a duty cycle of the second control signal assembly to turn on or turn off the slow-switching upper switch and the slow-switching lower switch.