PFC circuit

The invention discloses a PFC circuit, comprising two conversion branches which are electrically connected, wherein the each conversion branch comprises an input inductor, n switching units and n-1 coupling inductors, one end of the input inductor is connected with an input power supply; the n switching units are connected in parallel, and the n is a positive integer greater than or equal to 2; the each coupling inductor comprises two windings, and the two windings form reverse coupling; at least one winding is connected in series between the each switching unit and the other end of the inputinductor, when the n switching units are conducted, a current flowing through the n switching units is equalized through the n-1 coupling inductors. 本发明公开了一种PFC电路，包括电性连接的两个转换支路，每一转换支路包括：输入电感、n个开关单元及n-1个耦合电感，输入电感的一端与输入电源相连；n个开关单元并联连接，n为大于等于2的正整数；每一耦合电感包括两个绕组，且两个绕组形成反向耦合；其中，每一开关单元与输入电感的另一端之间串联有至少一绕组，当n个开关单元导通时，通过n-1个耦合电感对流过n个开关单元的电流进行均流。