EUA2032
Low EMI, Ultra-Low Distortion, 2.5-W Mono
Filterless Class-D Audio Power Amplifier
DESCRIPTION
The EUA2032 is a high efficiency, 2.5W mono class-D
audio power amplifier. A new developed filterless PWM
modulation architecture further reduces EMI and THD+N,
as well as eliminates the LC output filter, reducing external
component count, system cost, and simplifying design.
Operating in a single 5V supply, EUA2032 is capable of
driving 4Ω speaker load at a continuous average output of
2.5W/10% THD+N or 2W/1% THD+N. The EUA2032 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 EUA2032. The
gain of EUA2032 is externally configurable which allows
independent gain control from multiple sources by
summing signals from separate sources.
The EUA2032 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:
−
84% at 400 mW
Low 2.4-mA Quiescent Current and
0.5-µA Shutdown Current
2.5V to 5.5V Wide Supply Voltage
Ultra-Low Distortion - 0.07% THD+N at 1W and
8-Ω Load
Shutdown Pin Compatible with 1.8V Logic GPIO
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)
3mm
×
3mm TDFN-8 Package
RoHS compliant and 100% lead(Pb)-free
APPLICATIONS
Ideal for Wireless or cellular Handsets and PDAs
Typical Application Circuit
Figure1.
DS2032
Ver 1.0
July 2009
1
EUTECH [ EUTECH MICROELECTRONICS INC ]
