Hybrid ZCD-Based Critical Conduction Mode Totem-pole PFC

作者：Gibum Yu, Xingyu Chen, Rahul Rajendran, Qiang Li · 年份：2024 · DOI：10.1109/ecce55643.2024.10861581 · 被引用次数：7 · 研究领域：Advanced Data Storage Technologies、Advancements in Semiconductor Devices and Circuit Design、Radio Frequency Integrated Circuit Design

This paper proposes the novel hybrid zero current detector (ZCD) method for critical conduction mode (CRM) based totem-pole power factor correction (PFC). In the conventional ZCD-based method, the large undesired negative current is generated due to the ZCD circuit's propagation delay and the MCU's processing delay. The proposed hybrid ZCD method guarantees CRM operation using a ZCD circuit and compensates for this ZCD delay using the synchronized rectifier (SR) on-time calculation. Therefore, the undesired negative current is eliminated, and the inductor current ripple is reduced, leading to higher efficiency at a higher switching frequency. A 6.6kW two-channel interleaved totem-pole PFC with the hybrid ZCD is built and verified by the experiment.