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The TPA122 MSOP Audio Power Amplifier Evaluation Module
3-3
Details
3.2 The TPA122 MSOP Audio Power Amplifier Evaluation Module
The TPA122 MSOP Audio Power Amplifier Evaluation Module is powered by
a TPA122 150-mW Stereo Audio Amplifier IC. It includes a shutdown control
signal input with onboard switch and can drive either line-level outputs, 32-Ω
headphones, or 8-Ω speakers.
The evaluation module can be used with the TI Plug-N-Play Audio Amplifier
Evaluation Platform (Figure 3–1) or wired directly into circuits or equipment.
The module has single in-line header connector pins mounted to the under
side of the board. These pins allow the module to be plugged into the TI
platform, which automatically makes all the signal input and output, power, and
control connections to the module.
The module connection pins are on 0.1-inch centers to allow easy use with
standard perf board and plug board-based prototyping systems. Or, the EVM
can be wired directly into existing circuits and equipment when used
stand-alone.
The module appears in Figure 3–2 and its schematic is shown in Figure 3–3.
Figure 3–2. TPA122 MSOP EVM
GND
Vo2
IN2
GND
VDD GND
IN1
GND
R1
C3
R4
S1
Shutdown
C5
Vo1
GND
C2
TEXAS
INSTRUMENTS
SLOP127
TPA122 MSOP EVM
C4
R5
R3
R2
C1
U1
†
+
†
Due to the very small size of the MSOP IC package, the standard part number TPA122 is replaced with the code TIAAE
Figure 3–3. TPA122 MSOP EVM Schematic Diagram
IN 1
Vo1
V
DD
Vo2
Bypass
GND
Shutdown
IN 2
C2
1 µF
R4
20 kΩ
C3
1 µF
R2
20 kΩ
C1
1 µF
8
7
6
5
1
2
3
4
Vo2
Audio Input 1
Audio Input 2
Shutdown
(V
DD
to
Shutdown)
R5
80 kΩ
TPA122
MSOP
C4
1 µF
+
V
DD
2.5 to 5.5 V
GND
C5
10 µF
Vo1
R3
80 kΩ
R1
20 kΩ
S1
V
DD
NO