EUA2011
3-W Mono Filterless Class-D
Audio Power Amplifier
DESCRIPTION
The EUA2011 is a high efficiency, 3W 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, EUA2011 is capable of
driving 4Ω speaker load at a continuous average output of
3W/10% THD+N or 2W/1% THD+N. The EUA2011 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 88%.
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
Unique Modulation Scheme Reduces EMI Emissions
Efficiency at 3.6V With an 8-Ω Speaker:
−
88% at 400 mW
−
80% at 100 mW
Low 2.4-mA Quiescent Current and
0.5-µA Shutdown Current
2.5V to 5.5V Wide Supply Voltage
Shutdown Pin Compatible with 1.8V Logic GPIO
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
1.5mm
×
1.5mm Wafer Chip Scale Package (WCSP)
and 3mm
×
3mm TDFN-8 package
RoHS compliant and 100% lead(Pb)-free
APPLICATIONS
Typical Application Circuit
Ideal for Wireless or cellular Handsets and PDAs
Figure1.
DS2011 Ver 1.1
Dec. 2007
1
EUTECH [ EUTECH MICROELECTRONICS INC ]
