公开(公告)号：US20200036284A1

公开(公告)日：2020-01-30

申请号：US16046732

申请日：2018-07-26

Applicant: Analog Devices Global Unlimited Company

Inventor： Wenhui Qin ,  Xin Yang ,  Shaoyu Ma ,  Fang Liu ,  Yuanyuan Zhao

IPC: H02M1/44 ,  H02M7/06 ,  H03B5/12 ,  H03L7/099 ,  H01F38/14 ,  H01F27/34

Abstract: Power isolators for providing electrical isolation between an input port and an output port that exhibit low electromagnetic interference (EMI) are described. The low EMI may be achieved by, for example, canceling out a common mode current across a transformer in the power isolator that may be converted into EMI. The power isolator may include at least one oscillator circuit that is configured to apply a first signal to a first transformer and a second, different signal to a second transformer. The first and second signals may be configured such that the common mode current generated in each of the first and second transformers has an opposite direction. Thus, the common mode currents in the first and second transformers may at least partially cancel out. As a result, the EMI exhibited by the power isolator may be reduced.