The TPA152 Audio Power Amplifier Evaluation Module
3-3
Details
3.2
The TPA152 Audio Power Amplifier Evaluation Module
The TPA152 Audio Power Amplifier Evaluation Module is powered by a
TPA152 75-mW Stereo Audio Amplifier IC, includes a mute control signal input
with on-board switch, and can drive either 32-
Ω
headphones or line-level
outputs.
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. TPA152 EVM
GND
Vo2
C3
IN2
GND
Vdd GND
IN1
SD
GND
U1
R4
R3
R1
R6
C5
R2
S1
Shut-
down
C4
Vo1
C7
C1
C6
C2
TEXAS
INSTRUMENTS
SLOP124
TPA152 EVM
GND
Figure 3–3. TPA152 EVM Schematic Diagram
IN 1–
GND
VDD
VO2
VO1
Mute
Bypass
IN 2–
VDD
R6
20 k
Ω
C5
1
µ
F
R3
20 k
Ω
C3
1
µ
F
R1
20 k
Ω
C1
1
µ
F
S1
NO
C6
1
µ
F
R4, 20 k
Ω
C4, 5 pF
C2, 5 pF
R2, 20 k
Ω
8
7
6
5
1
2
3
4
Output 1
C7
10
µ
F
Audio Input 1
Audio Input 2
SD
(VDD to Mute)
TPA152
+
VDD
4.5 to 5.5 V
GND
Output 2
