DESCRIPTION
A low noise, filterless PWM architecture eliminates the output filter, reducing external component count, system cost, and simplifying design. Operating in a single 5V supply, EUA2011 is capable of driving 4Ω speaker load at a continuous average output of 3W/10% THD+N or 2W/1% THD+N. In cellular handsets, the earpiece, speaker phone, and melody ringer can each be driven by the EUA2011. The gain of EUA2011 is externally configurable which allows independent gain control from multiple sources by summing signals from separate sources. The EUA2011 is available in space-saving WCSP and TDFN packages. FEATURES
z Unique Modulation Scheme Reduces EMI Emissions z Efficiency at 3.6V With an 8-Ω Speaker: − 88% at 400 mW − 80% at 100 mW z Low 2.4-mA Quiescent Current and 0.5-µA Shutdown Current z 2.5V to 5.5V Wide Supply Voltage z Shutdown Pin Compatible with 1.8V Logic GPIO z Optimized PWM Output Stage Eliminates LC Output Filter z Improved PSRR (−72 dB) Eliminates Need for a Voltage...
Eutech Microelectronics
