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The TPA102 MSOP Audio Power Amplifier Evaluation Module
3-4
Details
3.2.1 TPA102 Audio Amplifier IC
The TPA102 audio amplifier IC is a CMOS device intended primarily for
high-performance line-level output, headphone driver, and small speaker
applications. It is supplied in a very small surface-mount MSOP package
designed to operate from low supply voltages (between approximately 2.5 V
and 5.5 V) and deliver up to approximately 150 mW into 8-Ω speakers with low
distortion. As a line-level driver, distortion levels (THD+N) are below 0.03%
into 10-kΩ loads across the audio band (20 Hz to 20 kHz). As a headphone
driver, distortion levels are below 0.4% into 32-Ω loads across the audio band.
And as a speaker driver, distortion levels are below 0.8% into 8-Ω loads across
the audio band. Typical applications include portable computers, desktop
computers, personal audio, toys, games, and similar audio applications.
The IC includes two separate internal amplifiers, depop circuitry, and a
common shutdown control (Figure 3–4). The load for each channel is
connected between the V
O
pin and GND through a coupling capacitor. For
more information, see the TPA102 amplifier IC data sheet, TI literature number
SLOS213.
Figure 3–4. TPA102 Amplifier IC
Stereo
R
L
R
L
C
C
C
C
V
O
1
V
O
2
Bypass
IN2
IN1
C
B
R
F
R
F
R
I
R
I
C
I
C
I
R
L
Stereo Audio
Input
Bias
Control
From System
Control
C
S
V
DD
4
1
3
7
8
6
5
–
–
+
+
Shutdown
2