公开(公告)号：US20240280613A1

公开(公告)日：2024-08-22

申请号：US18567039

申请日：2022-08-03

Applicant: SOUTHEAST UNIVERSITY

Inventor： Shen XU ,  Chenxi YANG ,  Yijie QIAN ,  Yujie LIU ,  Limin YU ,  Weifeng SUN ,  Longxing SHI

IPC: G01R19/25 ,  G01R15/04 ,  G01R19/00 ,  H02M1/00 ,  H02M3/157 ,  H02M3/158

CPC classification number: G01R19/25 ,  G01R15/04 ,  G01R19/0038 ,  H02M1/0009 ,  H02M3/157 ,  H02M3/158

Abstract: An inductor current estimation method for a DC-DC switching power supply using a voltage sampling module, a data conversion module, a switching signal counting module, an inductor voltage calculation module and a digital filter module, comprising: processing an input voltage and an output voltage by the voltage sampling module and the data conversion module to obtain a converted input voltage and a converted output voltage which have a same number of bits; comparing a node voltage with a reference voltage, and then obtaining a duty cycle by the switching signal counting module; and then, outputting an average voltage of two terminals of an inductor and a parasitic resistor by the inductor voltage calculation module, and finally, obtaining an estimated inductor current by the digital filter module.