Abstract

OLIVA, A.; CHIACCHIARINI, H.  and  BORTOLOTTO, G.. Development of a state feedback controller for the synchronouns buck converter. Lat. Am. appl. res. [online]. 2005, vol.35, n.2, pp.83-88. ISSN 0327-0793.

A digital control algorithm for a current-mode (CM) and a voltage-mode (VM) synchronous buck converter (SBC) is developed. In both cases, the design leads to a stable controller, even for a duty cycle larger than 50%. The desired output voltage and the transient response can be independently specified. Moreover, zero steady-state error in the output voltage can be obtained with the aid of additional dynamics. In both cases, the specification is done by pole placement using complete state feedback. A discrete-time model is used to design the feedback gains. Both the stability and the small-signal transient response are analyzed. In another paper (Oliva et al., 2003) the control algorithms are experimentally validated with a DSP-controlled SBC.

Keywords : Switch-Mode Power Supplies; Digital Control; Buck Converter.

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