Title :
A filter free class D audio amplifier with 86 power efficiency
Author :
Muggler, Patrick ; Chen, Wayne ; Jones, Clif ; Dagli, Paras ; Yazdi, Navid
Author_Institution :
Texas Instruments, Dallas, TX, USA
Abstract :
This paper presents a single chip class D amplifier with 2.5 W output power and 86% efficiency with an 8 ohm load. This chip uses a pulsed width modulation scheme that eliminates the output filter. It operates with a 2.5 V to 6.5 V supply voltage in a 7 V, 1.2 μm, double-poly, triple-metal BiCMOS process. It has an area of 1.5 × 1.5 mm2 and it achieves a THD as low as 0.04%, with a flatband response between 20 Hz and 20kHz.
Keywords :
BiCMOS analogue integrated circuits; audio-frequency amplifiers; pulse width modulation; 1.2 micron; 2.5 W; 2.5 to 6.5 V; 20 to 20000 Hz; 7 V; 8 ohm; 86 percent; BiCMOS process; THD; class D audio amplifier; filter free amplifier; flatband response; output filter; pulsed width modulation; single chip amplifier; BiCMOS integrated circuits; Bridge circuits; Filters; High power amplifiers; Power amplifiers; Power generation; Pulse amplifiers; Pulse width modulation; Space vector pulse width modulation; Voltage;
Conference_Titel :
Circuits and Systems, 2004. ISCAS '04. Proceedings of the 2004 International Symposium on
Print_ISBN :
0-7803-8251-X
DOI :
10.1109/ISCAS.2004.1328375
