公开(公告)号：US20240266943A1

公开(公告)日：2024-08-08

申请号：US18641384

申请日：2024-04-21

Applicant: SOUTHEAST UNIVERSITY

Inventor： Shen XU ,  Haiqing ZHANG ,  Yujie LIU ,  Ruizhi WANG ,  Yuan GAO ,  Yongjia LI ,  Weifeng SUN ,  Longxing SHI

IPC: H02M1/08 ,  H02M1/00 ,  H02M3/158

CPC classification number: H02M1/082 ,  H02M1/0025 ,  H02M3/1586

Abstract: A multi-phase high-precision current sharing control method applied to constant on-time control is provided, wherein a current difference between continuously sampled current of each line and mean current is processed by a PI compensation module and a low-pass filter module to obtain on-time regulation data. A high bit of the regulation data controls the value of counter reference Vref in an on-time control module, and a low bit controls the length of an enabled delay line in a delay line module. The counter timing control of the on-time control module is combined with the delay line timing control of the delay line module to improve the control precision of a DPWM. The method takes COT control of a Buck converter as a typical application. Compared with a multi-phase COT controller without a current-sharing mechanism, the method can improve the stability and reliability of the system.