Nonlinear Control for Improved Dynamic Response of Digitally Controlled DC-DC Converters

Author

Haitoa Hu ; Yousefzadeh, V. ; Maksimovic, Dragan

Author_Institution

Dept. of Electr. & Comput. Eng., Colorado Univ., Boulder, CO

fYear

2006

fDate

18-22 June 2006

Firstpage

1

Lastpage

7

Abstract

This paper presents nonlinear control design and implementation methods to achieve improved dynamic responses of digitally controlled switched-mode power supplies (SMPS) without compromising stability margins. The implementation, which includes a programmable A/D quantizer, is relatively simple and well suited for practical high-frequency SMPS controllers. Simulation and experimental results, which are presented for a point-of-load 5 V-to-1.3 V digitally controlled synchronous buck converter, show significantly improved step-load transient responses

Keywords

DC-DC power convertors; control system synthesis; digital control; nonlinear control systems; switched mode power supplies; transient response; 5 to 1.3 V; digitally controlled DC-DC converters; dynamic response; high-frequency SMPS controllers; nonlinear control; programmable A/D quantizer; stability margins; step-load transient responses; switched-mode power supplies; synchronous buck converter; Buck converters; DC-DC power converters; Digital control; Pulse width modulation; Quantization; Size control; Stability; Switched-mode power supply; Switching converters; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Electronics Specialists Conference, 2006. PESC '06. 37th IEEE

Conference_Location

Jeju

ISSN

0275-9306

Print_ISBN

0-7803-9716-9

Type

conf

DOI

10.1109/PESC.2006.1712160

Filename

1712160