A high performance switching audio amplifier using sliding mode control

Author

Pillonnet, Gael ; Cellier, Rémy ; Abouchi, Nacer ; Chiollaz, Monique

Author_Institution

Adv. Audio Res. Lab. at CPE Lyon / INL, STMicroelectronics, Grenoble

fYear

2008

fDate

22-25 June 2008

Firstpage

305

Lastpage

309

Abstract

The switching audio amplifiers are widely used in various portable and consumer electronics due to their high efficiency, but suffers from low audio performances due to inherent nonlinearity. This paper presents an integrated class D audio amplifier with low consumption and high audio performances. It includes a power stage and an efficient control based on sliding mode technique. This monolithic class D amplifier is capable of delivering up to 1 W into 8 Omega load at less 0.01% THD from a 2.3 V power supply voltage in the high fidelity range (20 Hz-20 kHz). The power supply rejection is superior to 70 dB.

Keywords

audio-frequency amplifiers; consumer electronics; harmonic distortion; low-power electronics; power amplifiers; variable structure systems; THD; consumer electronics; frequency 20 Hz to 20 kHz; high-performance switching audio amplifier; integrated monolithic class D audio amplifier; portable electronics; power 1 W; power supply rejection; sliding mode control; voltage 2.3 V; Error correction; Feedback; Power amplifiers; Power generation; Power supplies; Pulse amplifiers; Pulse width modulation; Sliding mode control; Space vector pulse width modulation; Switching frequency; Switching audio amplifier; feedback; linearity; sliding mode control;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems and TAISA Conference, 2008. NEWCAS-TAISA 2008. 2008 Joint 6th International IEEE Northeast Workshop on

Conference_Location

Montreal, QC

Print_ISBN

978-1-4244-2331-6

Electronic_ISBN

978-1-4244-2332-3

Type

conf

DOI

10.1109/NEWCAS.2008.4606382

Filename

4606382