Peak current detector based control of DC-DC buck converter for portable application

Author

Dokania, R.K. ; Baranwal, S.K. ; Patra, Amit

Author_Institution

Intel Technol. India Pvt. Ltd., Bangalore, India

fYear

2004

fDate

20-22 Dec. 2004

Firstpage

594

Lastpage

596

Abstract

This paper presents a control scheme for DC-DC converters designed for battery operated systems. These systems require very high efficiency to prolong the battery life The inductor peak current is maintained constant either by oscillator on/off time control or monoshot on time control. But these types of control require a fixed and accurate value of inductor and they require preprogramming of monoshot/oscillator. The proposed control scheme uses a peak current detector for the inductor peak current detection. Therefore it rules out maintaining a very precise value of inductor size and any kind of preprogramming. A design and its implementation have been carried out in a 1.5 μ BiCMOS process and both simulation and experimental results are presented.

Keywords

BiCMOS integrated circuits; DC-DC power convertors; electric current control; inductors; machine control; peak detectors; power inductors; 1.5 micron; BiCMOS process; DC-DC buck converter; battery operated system; control scheme; inductor peak current detector; monoshot preprogramming; oscillator on-off time control; portable application; Batteries; Buck converters; Control systems; Detectors; Inductance; Inductors; Open loop systems; Oscillators; Switches; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

India Annual Conference, 2004. Proceedings of the IEEE INDICON 2004. First

Print_ISBN

0-7803-8909-3

Type

conf

DOI

10.1109/INDICO.2004.1497829

Filename

1497829