Switching Power Supplies 12V 43A 480W Active PFC Function

As part of the basic knowledge of switching power supplies, we would like to explain the power factor correction PFC, circuit. First, we will explain the influence of the power supply circuit on the power grid. The AC power transmitted from the power plant through the grid is connected to various AC DC power supply via the power outlet in the home or in the factory. The distortion of the electric current waveform created when converting from AC to DC in the power supply returns to the power grid, which will reduce the efficiency of the power grid and adversely affects the equipment connected to it. Here, the explanation of AC power is repeated. In AC, both voltage and current change instantaneously with time, instantaneous power is the product of the voltage and current. When the waveform of both the voltage and current is sinusoidal and in the same phase, average power obtained integra