Circuit and method for reconstructing inductive current in switching converter

The invention discloses a circuit and a method for reconstructing inductive current in a switching converter. Sampling the inductive current during the conduction period of the first switch tube, obtaining a mean value signal representing the mean value of the inductive current during the conduction period of the first switch tube according to a valley value sampling signal representing the valley value of the inductive current and the ripple of the inductive current, and outputting a first sampling signal to simulate the inductive current during the conduction period of the first switch tube; and during the conduction period of the second switching tube, outputting a mean value signal to simulate the inductive current, thereby completing the reconstruction of the inductive current. 公开了一种重构开关变换器中电感电流的电路及方法。在第一开关管导通期间内采样电感电流，并根据表征电感电流的谷值的谷值采样信号和电感电流的纹波来获取表征第一开关管导通期间内电感电流的平均值的均值信号，其中在第一开关管导通期间，输出第一采样信号以模拟电感电流；在第二开关管导通期间，输出均值信号以模拟电感电流，从而完成了电感电流的重构。