Research on Improved Technology of Totem-Pole Bridgeless PFC Circuit Based on Triangular Current Mode

Pingjuan Niu, Jingying Guo (), Zhigang Gao, Jingwen Yan and Shengwei Gao
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Pingjuan Niu: School of Electronics and Information Engineering, Tiangong University, Tianjin 300387, China
Jingying Guo: School of Electrical Engineering, Tiangong University, Tianjin 300387, China
Zhigang Gao: Tianjin Expansion Technology Co., Ltd., Tianjin 300387, China
Jingwen Yan: School of Electrical Engineering, Tiangong University, Tianjin 300387, China
Shengwei Gao: School of Electrical Engineering, Tiangong University, Tianjin 300387, China

Energies, 2025, vol. 18, issue 14, 1-24

Abstract: The totem-pole bridgeless power factor correction (PFC) circuit based on the triangular current mode (TCM) in the front-end PFC of a switching power supply has the advantage of realizing zero-voltage switching (ZVS) in the full working range. However, the TCM control based on the critical conduction mode (CRM) further increases the inductance current ripple, and the traditional input voltage AC sampling circuit increases the circuit complexity and device cost. Therefore, this paper studies the corresponding improvement technology from two dimensions. Firstly, the coordinated interleaved parallel technology is employed to design the system’s overall control-improvement strategy. This approach not only achieves full working-range ZVS but also reduces both the inductor current ripple and power device stress. Simultaneously, an optimized input voltage sampling circuit is designed to accommodate varying voltage requirements of control chip pins. This circuit demonstrates strong synchronization in both voltage and phase sampling, and the structural characteristics of the optocoupler can also suppress electrical signal interference. Finally, a 600 W totem-pole bridgeless PFC prototype is developed. The experimental results demonstrate the effectiveness of the proposed improved method. The prototype efficiency peak reaches 97.3%.

Keywords: totem-pole bridgeless PFC; triangular current mode; interleaving control; AC voltage sampling (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2025
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