The LM4671 is a single supply, high efficiency 2.5W switchingaudio amplifier. A low noise, filterless PWM architecture eliminatesthe output filter, reducing external component count,board area consumption, system cost, and simplifying design.The LM4671 is designed to meet the demands of mobilephones and other portable communication devices. Operatingon a single 5V supply, it is capable of driving a 4Ω speakerload at a continuous average output of 2.1W with less than1% THD+N. Its flexible power supply requirements allow operationfrom 2.4V to 5.5V.
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