EUA2005

EUA2005 1.5-W Mono Filterless Class-D Audio Power Amplifier DESCRIPTION The EUA2005 is a high efficiency, 1.5W mono class-D audio power amplifier. 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, EUA2005 is capable of driving 8Ω speaker load at a continuous average output of 1.5W/10% THD+N or 1.3W/1% THD+N. The EUA2005 has high efficiency with speaker load compared to a typical class AB amplifier. With a 3.6V supply driving an 8Ω speaker , the efficiency for a 400mW power level is 84%. In cellular handsets, the earpiece, speaker phone, and melody ringer can each be driven by the EUA2005. The gain of EUA2005 is externally configurable which allows independent gain control from multiple sources by summing signals from seperate sources. The EUA2005 is available in DFN packages. FEATURES z z z z z z z z z z z Efficiency at 3.6V With an 8-Ω Speaker: − 84% at 400 mW − 80% at 100 mW Low 2.8-mA Quiescent Current and 0.5-µA Shutdown Current 2.5V to 5.5V Wide Supply Voltage Optimized PWM Output Stage Eliminates LC Output Filter Improved PSRR (−72 dB) Eliminates Need for a Voltage Regulator Fully Differential Design Reduces RF Rectification and Eliminates Bypass Capacitor Improved CMRR Eliminates Two Input Coupling Capacitors Internally Generated 250-kHz Switching Frequency Integrated Pop and Click Suppression Circuitry 3mm × 3mm DFN-8 package RoHS compliant an...