A Single-Phase GaN Totem-Pole PFC with Active Power Decoupling

In this paper, a single-phase Power Factor Correction (PFC) approach employing a GaN Totem-Pole topology with an H-Bridge Active Power Decoupling (APD) stage is discussed. With the addition of APD stage coupled with closed loop control the DC-Link capacitor size is shown to decrease. The proposed topology is composed of three GaN high switching frequency legs (100 kHz) and one low (line) frequency leg (60 Hz). The H-Bridge APD circuit consists of two of the high switching frequency legs (100 kHz) with four GaN FETs, a decoupling capacitor and an inductor. Simulations and experimental results show the effectiveness of the proposed approach.