Texas Instruments TPA102 MSOP - Manual (Page 18)

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-k
Ω
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
RL RL
CC
CC
VO1
VO2
Bypass
IN2
IN1
CB
RF
RF
RI
RI
CI
CI
R
L
Stereo Audio
Input
Bias
Control
From System
Control
CS
VDD
4
1
3
7
8
6
5
–
–
+
+
Shutdown
2