T09.8 - An Ultra-Fast Control Strategy and Pre-Current-Balancing Measures Prepared for Rapid Transients in Constant On-Time Controllers

Wednesday, March 19, 2025

11:20 AM – 11:40 AM ET

Location: Level Three, A302

Technical Lecture Presenter(s)

Yijie Qian, PhD student

Southeast University

Presentation Paper

Co-Author(s)

YG

Yuan Gao

Southeast University
WS

Wenze Shu

Southeast University
Lingyun Li, PhD

Southeast University
SX

Shen Xu

Southeast University
WS

Weifeng Sun

Southeast University

The digest presents an ultra-fast control strategy during step-up transients in constant on-time (COT) controllers. This control strategy significantly improves the magnitude of undershoot over the traditional COT control method. In addition, the pre-current-balancing measures can quickly balance the current deviation caused by the high dynamic strategy without additional sampling circuits so that the current remains balanced during rapid load steps to avoid triggering the overcurrent protection. The control strategy is tested on a 16-phase Buck converter, and the results show that it greatly improves the undershoot and maintains the current balance.