The LPA2150 is a high efficiency, 2x3.0W class-D audio power amplifier. A new developed filterless PWM modulation architecture further reduces EMI and THD+N, as well as eliminates the LC output filter, reducing external component count, sys cost, and simplifying design. Operating in a single 5V supply, LPA2150 is capable of driving 4Ω speaker load at a continuous average output of 3.05W/10% THD+N or 2.6W/1% THD+N. The LPA2150 has high efficiency with speaker load compared to a typical class D amplifier. With a 3.6V supply driving an 8Ω speaker, the efficiency for a 400mW power level is 90%.In cellular handsets, the earpiece, speaker phone, and melody ringer can each be driven by the LPA2150. The gain of LPA2150 is externally configurable which allows independent gain control from multiple sources by summing signals from separate sources. The LPA2150 is available in space-saving SOP16 packages.