Pulse regulation, a fixed frequency control technique, is introduced and applied to flyback converter operating in discontinuous conduction mode (DCM). The control parameters are designed in a way that the converter operates as close as possible to the critical conduction mode. In contrast to the conventional pulse width modulation (PWM) control scheme, the principal idea of pulse regulation is to achieve output voltage regulation using high and low-power pulses. Pulse regulation is simple, cost effective, and enjoys a fast dynamic response. The proposed technique is applicable to any converter operating in DCM. However, this work mainly focuses on flyback topology. In this paper, the main mathematical concept of the new control algorithm is introduced and simulation as well as experimental results are presented.

Meeting Name

19th Annual IEEE Applied Power Electronics Conference and Exposition (2004: Feb. 22-26, Anaheim, CA)


Electrical and Computer Engineering

Keywords and Phrases

DC-DC Power Converters; PWM; PWM Power Convertors; Control Parameters; Critical Conduction Mode; Discontinuous Conduction Mode; Dynamic Response; Flyback Converter; Flyback Topology; Frequency Control; Frequency Control Technique; Mathematical Analysis; Mathematical Concept; Pulse Regulation Control Technique; Pulse Width Modulation Control Scheme; Sampled Data Systems; Switch-Mode Power Supplies; Switched Mode Power Supplies; Voltage Control; Voltage Regulation

International Standard Book Number (ISBN)


Document Type

Article - Conference proceedings

Document Version

Final Version

File Type





© 2004 Institute of Electrical and Electronics Engineers (IEEE), All rights reserved.

Publication Date

01 Feb 2004