Southeast University

Haiqing Zhang

Longxing Shi

Yuan Gao

Weifeng Sun

Shen Xu

Yujie Liu

Ruizhi Wang

Yongjia Li

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 Vin 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.

Multi-phase high-precision current sharing control method applied to constant on-time control

Growing community of inventors

Nanjing, China

Haiqing Zhang