用于优化DCM Boost PFC变换器效率和THD的分组谷底开关控制

In discontinuous conduction mode boost converters, the switching-node voltage oscillates after the inductor current reaches zero, leading to fluctuating power loss. To investigate this, a circulating energy model is first proposed. Accurate power loss is analyzed with consideration of oscillation damping effect, reverse conduction of power switch, and nonlinear capacitance effect. Analysis shows t...