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Title: Fast-transient integrated digital DC-DC converter with predictive and feedforward control
Authors: Foong, Huey Chian
Zheng, Yuanjin
Tan, Yen Kheng
Tan, Meng Tong
Keywords: DRNTU::Engineering::Electrical and electronic engineering
Issue Date: 2012
Source: Foong, H. C., Zheng, Y., Tan, Y. K., & Tan, M. T. (2012). Fast-Transient Integrated Digital DC-DC Converter With Predictive and Feedforward Control. IEEE Transactions on Circuits and Systems I: Regular Papers, 59(7), 1567-1576.
Series/Report no.: IEEE transactions on circuits and systems I : regular papers
Abstract: This paper introduces a dual-mode digital dc-dc converter combining the predictive and feedforward control with the conventional PID controller to achieve fast transient response and low overshoot. An additional predictive or jerk component is added to the conventional PID controller to speed up the transient response and reduce the settling time by approximately 50%. This predictive term is based on the second derivative of the error signal and introduces zero to the loop response which leads to increased bandwidth and improved phase margin. In addition, a feedforward control is also employed to further improve the transient by evaluating the change in the inductor current during the on and off time of the power transistors. Theoretical analysis and simulations were carried out to analyze the proposed design and algorithm. The proposed design is verified on silicon with a prototype of a digital dc-dc converter fabricated in CMOS 0.18 μ m process. The digital dc-dc converter achieved a settling time of 4 μs and an overshoot of 15 mV for a step-load transient of 450 mA, which are improved significantly as compared to the prior arts.
ISSN: 1549-8328
DOI: 10.1109/TCSI.2011.2177012
Rights: © 2012 IEEE.
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:EEE Journal Articles

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