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MULTIVARIABLE CONTROL OF SINGLE-INDUCTOR 
DUAL-OUTPUT BUCK CONVERTERS 
ABSTRACT: 
Cross regulation is the main technical challenge of a single-inductor 
multiple-output (SIMO) dc–dc converter. 
This project proposes amultivariable digital controller to suppress the cross 
regulation of a single-inductor dual-output (SIDO) buck converter in continuous 
conduction mode (CCM) operation. The controller design methodology originates 
from the open-loop shaping of the multi-inputmulti-output (MIMO) systems. The 
control design procedure includes: 1) determination of a family of nonparametric 
models of the SIDO converter at operating points of interest, 2) determination of 
the class of the controller, and 3) system open-loop shaping by the 
convexminimization of the summation of the square second norm of the errors 
between the system open-loop transfer function matrices and a desired open-loop 
transfer function matrix.
The proposed controller minimizes the coupling between the outputs of the 
SIDO converter and provides satisfactory dynamic performance in CCM operation. 
BLOCK DIAGRAM: 
DC source SIDO buck converter o/p 1 
Driver unit 
Pic controller 
o/p 2 
12v dc 
5v dc
CONTROLLER CIRCUIT: 
 PIC controller(PIC 16F877A) 
OUTPUT: 
 Hardware 
TOOLS and SOFTWARE: 
 MP Lab 
 Or cad/Pspice

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JPEEE1427 Multivariable Control of Single-Inductor Dual-Output Buck Converters

  • 1. MULTIVARIABLE CONTROL OF SINGLE-INDUCTOR DUAL-OUTPUT BUCK CONVERTERS ABSTRACT: Cross regulation is the main technical challenge of a single-inductor multiple-output (SIMO) dc–dc converter. This project proposes amultivariable digital controller to suppress the cross regulation of a single-inductor dual-output (SIDO) buck converter in continuous conduction mode (CCM) operation. The controller design methodology originates from the open-loop shaping of the multi-inputmulti-output (MIMO) systems. The control design procedure includes: 1) determination of a family of nonparametric models of the SIDO converter at operating points of interest, 2) determination of the class of the controller, and 3) system open-loop shaping by the convexminimization of the summation of the square second norm of the errors between the system open-loop transfer function matrices and a desired open-loop transfer function matrix.
  • 2. The proposed controller minimizes the coupling between the outputs of the SIDO converter and provides satisfactory dynamic performance in CCM operation. BLOCK DIAGRAM: DC source SIDO buck converter o/p 1 Driver unit Pic controller o/p 2 12v dc 5v dc
  • 3. CONTROLLER CIRCUIT:  PIC controller(PIC 16F877A) OUTPUT:  Hardware TOOLS and SOFTWARE:  MP Lab  Or cad/Pspice