3-W Stereo Class-D Audio Amplifier
with 32-Step DC Volume Control
DESCRIPTION
The EUA2008 is a high efficiency, 2 channel bridged-tied
load (BTL), class-D audio power amplifier. Operating from
a 5V power supply, EUA2008 is capable of delivering 3W/
channel of continuous output power to a 3Ω load with 10%
THD+N. The EUA2008 features a differential input
architecture offering improved noise immunity over a
single-ended (SE) input amplifier. Stereo speaker volume
is controlled with a dc voltage applied to the volume
control terminal offering a range of gain from -38dB to20
dB.
The EUA2008 also features short-circuit and thermal
protection preventing the device from being damaged
during a fault condition. The EUA2008 is available in
thermally efficient 24-pin TSSOP package.
EUA2008
FEATURES
Unique Modulation Scheme Reduces EMI Emission
Efficient 5V Class-D Technology
- 3W Per Channel into 3Ω Load (THD+N=10%)
- Low Supply Current, 7mA
- Low Shutdown Control,
1µA
- 0.33% THD at 1.5W, 1kHz
- Low Noise Floor, 62µV
- Maximum Efficiency into 3Ω, 85%
- Maximum Efficiency into 8Ω, 90%
- PSRR, -70dB
No Large, Expensive LC Output Filter Required
32-Step DC Volume Control with 2dB Steps from
-38dB to 20dB
Thermal and Short-Circuit Protection
Integrated Click and Pop Suppression
24-pin TSSOP Package with Thermal Pad
RoHS Compliant and 100% Lead(Pb)-Free
Halogen-Free
APPLICATIONS
LCD Monitors/TVs
All-in- One PCs
Powered Speakers
Typical Application Circuit
Figure1.
DS2008
Ver 1.0
Oct. 2009
1
EUTECH [ EUTECH MICROELECTRONICS INC ]
