Title :
A 2W, 92% efficiency and 0.01% THD+N class-D audio power amplifier for mobile applications, based on the novel SCOM architecture
Author :
Lee, Soo-Hyoung ; Shin, Jae-Young ; Lee, Ho-Young ; Park, Ho-Jin ; Lund, Kristian L. ; Nielsen, Karsten ; Kim, Jae-Whui
Author_Institution :
Samsung Electron. Co., Kyonggi-do, South Korea
Abstract :
This paper presents a high power efficient class-D audio power amplifier. The proposed class-D amplifier adopts the synchronized controlled oscillation modulator (SCOM), which is suitable for mobile applications. The THD+N at half the maximum output power is below 0.01% and the efficiency is better than 92% in an 8 Ω speaker load. The one-chip integrated circuit is implemented in a 0.35 μm CMOS technology, with a supply voltage range of 1.6 V-3.6 V. it occupies a chip area of 1.2×1.2 mm2 and dissipates only 1.3 mA at idle.
Keywords :
CMOS integrated circuits; audio-frequency amplifiers; low-power electronics; modulators; power amplifiers; 0.35 micron; 1.2 mm; 1.3 mA; 1.6 to 3.6 V; 2 W; 8 ohm; 92 percent; CMOS; SCOM architecture; class-D audio power amplifier; high power efficient amplifier; low idle power consumption; mobile applications; synchronized controlled oscillation modulator; CMOS technology; Complexity theory; Control systems; Frequency synchronization; High power amplifiers; Power amplifiers; Power harmonic filters; Pulse width modulation; Switching frequency; Transfer functions;
Conference_Titel :
Custom Integrated Circuits Conference, 2004. Proceedings of the IEEE 2004
Print_ISBN :
0-7803-8495-4
DOI :
10.1109/CICC.2004.1358802
