Title :
Multilevel inverter based class D audio amplifier for capacitive transducers
Author :
Nielsen, David ; Knott, Arnold ; Andersen, Michael A. E.
Author_Institution :
Tech. Univ. of Denmark, Lyngby, Denmark
Abstract :
The reduced semiconductor voltage stress makes the multilevel inverters especially interesting, when driving capacitive transducers for audio applications. A ± 300 V flying capacitor class D audio amplifier driving a 100 nF load in the midrange region of 0.1-3.5 kHz with Total Harmonic Distortion plus Noise (THD+N) below 1 % is presented.
Keywords :
audio-frequency amplifiers; capacitive sensors; harmonic distortion; invertors; power capacitors; THD+N; audio applications; capacitance 100 nF; capacitive transducers; class D audio amplifier; flying capacitor; frequency 0.1 kHz to 3.5 kHz; midrange region; multilevel inverter; semiconductor voltage stress reduction; total harmonic distortion plus noise; voltage 300 V; Capacitors; Frequency modulation; Inductors; Inverters; Stress; Transducers; Active damping; Amplifiers; Drive; High voltage power converters; Multilevel converters;
Conference_Titel :
Power Electronics and Applications (EPE'14-ECCE Europe), 2014 16th European Conference on
Conference_Location :
Lappeenranta
DOI :
10.1109/EPE.2014.6910925
