公开(公告)号：US20240079951A1

公开(公告)日：2024-03-07

申请号：US18305248

申请日：2023-04-21

Applicant: Navitas Semiconductor Limited

Inventor： Xiucheng Huang ,  Mingqiang Li ,  Weijing Du ,  Yun Zhou

IPC: H02M1/44 ,  H02M1/42 ,  H02M3/335 ,  H05K9/00

CPC classification number: H02M1/44 ,  H02M1/4208 ,  H02M3/33571 ,  H05K9/0075

Abstract: Systems and methods for improving radiated electromagnetic interference (EMI) in switching power supplies are disclosed. In one aspect, a converter circuit includes a transformer having a primary winding and a secondary winding, the primary winding extending from a first primary terminal to a second primary terminal, a first switch having a first gate terminal, a first source terminal and a first drain terminal, wherein the first drain terminal is coupled to the first primary terminal, and the first source terminal is coupled to a power source, and a capacitor having a first capacitor terminal and second capacitor terminal, wherein the first capacitor terminal is coupled to the power source. A ferrite bead is coupled between the first primary terminal and the first drain terminal, and a capacitor network is coupled in parallel with the ferrite bead and arranged to reduce radiated electromagnetic interference of the converter circuit.