Title: Digital control of multiple output DC-DC converter using 16 bit microcontroller

Authors: M.G. Rajesh Kumar, G. Sajitha, Thomas Kurian

Addresses: Vikram Sarabhai Space Centre, Indian Space Research Organization, Trivandrum – 695022, India. ' Vikram Sarabhai Space Centre, Indian Space Research Organization, Trivandrum – 695022, India. ' Department of Avionics, Indian Institute of Space Science and Technology, Department of Space, Government of India, Trivandrum – 695022, India

Abstract: This paper presents the design and implementation of a digital controller for a multiple output buck converter operating at the switching frequency of 100 KHz. The implementation of the digital controller is using a low cost 16-bit fixed point PIC microcontroller. Compensator using digital control techniques and simulink model of the converter in closed loop is also presented. This paper proposes a closed loop solution to overcome limit cycling in DC-DC converter using digital control techniques. Experimental results are also presented in this paper to validate the results of the theoretical analysis of the converter.

Keywords: DC-DC converters; digital control; limit cycling; quantisation error correction; time division multiple control; PID control; controller design; modelling.

DOI: 10.1504/IJPELEC.2011.039498

International Journal of Power Electronics, 2011 Vol.3 No.3, pp.225 - 239

Available online: 06 Apr 2011 *

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