EUA2005
DS2005 Ver 1.1 Nov. 2006
1
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
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 and 100% lead(Pb)-free
APPLICATIONS
Ideal for Wireless or Cellular Handsets and PDAs
Typical Application Circuit
Figure1.
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