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. The method comprises the following steps: sampling an inductive current during the conduction period of a first switching tube in a current switching period to obtain a first sampling signal, outputting the first sampling signal, sampling the inductive current at the 1/2 position of a first timing value starting from the conduction of the first switching tube to obtain a mean value signal, and outputting the mean value signal when a second switching tube is conducted. Therefore, the reconstruction of the inductive current is completed, and the first timing value represents the conduction time of the first switching tube in the last switching period. 公开了一种重构开关变换器中电感电流的电路及方法。通过在当前开关周期的第一开关管导通期间采样电感电流得到第一采样信号并输出，同时在自第一开关管导通时开始的第一计时值的1/2处对电感电流进行采样得到均值信号，并在第二开关管导通时输出该均值信号，从而完成了电感电流的重构，其中第一计时值表征上个开关周期的第一开关管的导通时间。