DESCRIPTION
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, system cost, and simplifying design. Operating in a single 5V supply, EUA2011A is capable of driving 4Ω speaker load at a continuous average output of 2.5W/10% THD+N or 2W/1% THD+N. In cellular handsets, the earpiece, speaker phone, and melody ringer can each be driven by the EUA2011A. The gain of EUA2011A is externally configurable which allows independent gain control from multiple sources by summing signals from separate sources. The EUA2011A is available in space-saving WCSP package. EUA2011A FEATURES
z z z z z z z z z z z z z Unique Modulation Scheme Reduces EMI Emissions Efficiency at 3.6V With an 8-Ω Speaker: − 84% at 400 mW Low 2.4-mA Quiescent Current and 0.5-µA Shutdown Current 2.5V to 5.5V Wide Supply Voltage Ultra-Low Distortion - 0.07% THD+N at 1W and 8-Ω Load Shutdown Pin Compatible with 1.8V Logic...
Eutech Microelectronics
