Off-time prediction in digital constant on-time modulation for DC-DC converters

—This paper proposes a digital constant on-time control method for high switching frequency DC-DC buck converter, which eliminates the need for high resolution digital pulse-width modulator (DPWM) compared to constant frequency control. Both simulation and experimental results demonstrate performance improvement through the proposed off-time prediction method in terms of the oscillation amplitude of the output voltage.

• Type: Conference
• Year: 2008
• Where: ISCAS
• Authors: Na Kong, Dong Sam Ha, Jian Li, Fred C. Lee
• Keywords: Constant Frequency Control, Constant On-time Control, Frequency Dc-dc Buck, Hardware, ISCAS 2008