Peak current-mode control for a boost converter using an 8-bit microcontroller

Author

He, Dake ; Nelms, R.M.

Author_Institution

Dept. of Electr. & Comput. Eng., Auburn Univ., AL, USA

Volume

2

fYear

2003

fDate

15-19 June 2003

Firstpage

938

Abstract

In a current-mode control (CMC) system, the inductor current has a fundamental frequency equal to the switching frequency that far exceeds the maximum sampling rate of most microcontroller A/D converters. In order to demonstrate the feasibility of a microcontroller-based CMC DC-DC converter, a peak current controller for a boost converter operating in the continuous conduction mode has been designed and implemented using a PIC16C782 microcontroller. Practical issues in designing a digital CMC converter are briefly discussed. Experimental results are presented, and encouragingly demonstrate the performance that a microcontroller-based CMC DC-DC converter can achieve. The digital controller has been compared to an analog controller based on a UC3842.

Keywords

DC-DC power convertors; digital control; electric current control; microcontrollers; 12 V; 156.25 kHz; 28 V; 8-bit microcontroller; PIC16C782 microcontroller; boost converter; continuous conduction mode; digital controller; fundamental frequency; inductor current; microcontroller-based CMC DC-DC converter; peak current-mode control; switching frequency; Control systems; DC-DC power converters; Digital control; Digital signal processing; Inductors; Linear feedback control systems; Microcontrollers; Sampling methods; Switches; Switching converters;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Electronics Specialist Conference, 2003. PESC '03. 2003 IEEE 34th Annual

ISSN

0275-9306

Print_ISBN

0-7803-7754-0

Type

conf

DOI

10.1109/PESC.2003.1218181

Filename

1218181