Texas Instruments SLOU020A - Manual (Page 17)

The TPA311 MSOP Audio Power Amplifier Evaluation Module
3-3 Details
3.2 The TPA311 MSOP Audio Power Amplifier Evaluation Module
The TPA311 MSOP audio power amplifier evaluation module is powered by
a TPA311 350-mW low-power audio amplifier IC, includes a shutdown control
signal input with onboard switch, and can be operated in either the BTL or
single-ended output mode.
The 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. TPA311 MSOP EVM
OUT+
IN+
GND
Vdd GND
U1 †
R2
Shutdown
R3
OUT–
GND
C5
TEXAS
INSTRUMENTS
SLOP123
TPA311 MSOP EVM
C4
C1
C2
R4
SE\BTL*
C3
S1
R1
+
† Due to the very small size of the MSOP IC package, the standard part number TPA311 is replaced with the code TIAAB
Figure 3–3. TPA311 MSOP EVM Schematic Diagram
C2
1
µ
F
C1
1
µ
F
R1
20 k
Ω
Audio Input+
GND
Shutdown
S1
C4
5 pF
OUT–
GND
OUT+
R3
40 k
Ω
R2
20 k
Ω
No
C5
10
µ
F
C3
1
µ
F
Shutdown
Bypass
SE/BTL
In
V
O –
GND
V
DD
V
O +
8
7
6
5
1
2
3
4
GND
VDD
2.5 V to 5.5 V
+
SE/BTL
R4
20 k
Ω