Evaluation of TCM and CrCM modulation for Totem Pole PFC
Conference: PCIM Europe 2016 - International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management
05/10/2016 - 05/12/2016 at Nürnberg, Deutschland
Proceedings: PCIM Europe 2016
Pages: 7Language: englishTyp: PDF
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Authors:
Zhou, Haihua; Liu, Wenduo; Persson, Eric (Infineon Technologies Americas Corp, 101 N Sepulveda Blvd, El Segundo, CA, 90245, USA)
Abstract:
Recently totem pole FPC becomes popular due to the minimum component number and less common mode EMI noise. With the availability of GaN switches, high frequency switching is applied in totem pole PFC to achieve high power density. Triangular Current Mode (TCM) and Critical Current Mode (CrCM) modulation minimize switching loss and are good for high frequency. In this paper, two modulations are evaluated. Simulation results show CrCM is simple for implementation but does not achieve Zero Voltage Switching (ZVS) in full range with wide frequency variation at different load conditions; while TCM requires complex calculation for on/off timings to ensure ZVS at full range with narrow frequency variation. CrCM has higher THD than TCM due to discontinuous input current. Power switches loss is measured in simulation by Simetrix. Device with lower Qoss is preferred.