Title :
A reconfigurable audio power amplifier delivering 150 W to 1 Ω loudspeakers for in-car sound systems
Author :
Chelli, F. ; Brambilla, D. ; Stefani, F.
Author_Institution :
ST Microelectron., Milan, Italy
fDate :
8/1/2002 12:00:00 AM
Abstract :
A reconfigurable audio amplifier is proposed. It can be configured to operate as a standard dual-bridge, a high-efficiency dual-bridge, or a high-power mono-bridge amplifier. Moreover, all these configurations can be set in low-noise mode. Built-in diagnostics with an I2C-bus interface completes the features. The device, realized in a 0.6 μm technology, delivers to 1 Ω up to 150 W in high-power mode, saves 50% of the dissipated power in the high-efficiency configuration, and has a 16 μV RMS in-band output noise in the low-noise configuration.
Keywords :
BIMOS integrated circuits; audio equipment; audio-frequency amplifiers; built-in self test; integrated circuit design; power amplifiers; 0 to 150 W; 0.6 micron; 16 muV; I2C-bus interface; bipolar CMOS DMOS technology; built-in diagnostics; dual-bridge amplifier; in-car sound systems; loudspeaker impedance; low-noise mode; mono-bridge amplifier; reconfigurable audio power amplifier; Acoustic noise; Audio systems; Costs; Helium; High power amplifiers; Impedance; Loudspeakers; Microprocessors; Power amplifiers; Power generation;
Journal_Title :
Consumer Electronics, IEEE Transactions on
DOI :
10.1109/TCE.2002.1037061
