EUA2046 Datasheet, PDF (1/1 Pages) Eutech Microelectronics Inc – Audio Power Amplifier with Auto-Recovery

EUA2046
Low EMI, 2.8-W Mono Filterless Class-D
Audio Power Amplifier with Auto-Recovery
DESCRIPTION
The EUA2046 is a high efficiency, 2.8W 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, EUA2046 is capable of
driving 4Ω speaker load at a continuous average output of
2.8W/10% THD+N or 2.2W/1% THD+N. The EUA2046
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 EUA2046. The
gain of EUA2046 is externally configurable which allows
independent gain control from multiple sources by
summing signals from separate sources.
FEATURES
Unique Modulation Scheme Reduces EMI Emissions
Short Circuit Auto-Recovery
Efficiency at 3.6V With an 8-Ω Speaker:
− 84% at 400 mW
Low Quiescent Current and
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 (−68 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
Available in SOP-8 Package
RoHS compliant and 100% Lead(Pb)-Free
Halogen-Free
Typical Application Circuit
APPLICATIONS
Ideal for Wireless or cellular Handsets and PDAs
DS2046 Ver 1.0 Dec. 2010
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