A high efficiency filter-less class-D audio power amplifier

This paper presents a class D power audio amplifier, using ternary pulse-width-modulation (PWM) method to eliminate output filter. BTL configuration eliminates the need for external coupling capacitors on the output. It operates with 1.5 V voltage supply. The efficiency can achieve 88%, and total ha...

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Bibliographische Detailangaben
Hauptverfasser:	Yu-Jei Lin, Wan-Rone Liou, Mei-Ling Yeh
Format:	Tagungsbericht
Sprache:	eng
Schlagworte:	Capacitors Class D Amplifier Filterless High power amplifiers Power amplifiers Power filters Power harmonic filters Pulse amplifiers Pulse width modulation Space vector pulse width modulation ternary PWM Total harmonic distortion Voltage
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Beschreibung
Zusammenfassung:	This paper presents a class D power audio amplifier, using ternary pulse-width-modulation (PWM) method to eliminate output filter. BTL configuration eliminates the need for external coupling capacitors on the output. It operates with 1.5 V voltage supply. The efficiency can achieve 88%, and total harmonic distortion (THD) around 0.05% with 8 ¿ load at 10 KHz sine wave.
ISSN:	2162-7541 2162-755X
DOI:	10.1109/ASICON.2009.5351406