Title :
An integrated 200-W class-D audio amplifier
Author_Institution :
Philips Semicond. Nijmegen, Netherlands
fDate :
7/1/2003 12:00:00 AM
Abstract :
An integrated stereo class-D audio power amplifier realized in a silicon-on-insulator (SOI)-based BCD technology is presented. The amplifier is capable of delivering 2×100 W in two 4-Ω loads at a supply voltage of 60 V. A second-order feedback loop is used to suppress supply ripple and pulse-shape errors in the switching power stage. The limiting factor in the performance of any class-D amplifiers is the quality of the switching power stage. A high-speed low-current levelshifter and a robust deadtime control arrangement are proposed that enable the realization of a robust high-quality switching power stage. Some practical issues with respect to robustness and electromagnetic compatibility are discussed.
Keywords :
audio-frequency amplifiers; power amplifiers; power integrated circuits; silicon-on-insulator; 200 W; 60 V; SOI BCD technology; deadtime control; electromagnetic compatibility; high-speed low-current level-shifter; integrated stereo class-D audio power amplifier; robustness; second-order feedback loop; switching power stage; CMOS technology; Frequency; Power amplifiers; Protection; Pulse amplifiers; Pulse width modulation; Schottky diodes; Semiconductor diodes; Silicon on insulator technology; Voltage;
Journal_Title :
Solid-State Circuits, IEEE Journal of
DOI :
10.1109/JSSC.2003.813238
