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 TP A31 1 350-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 µF
C1
1 µF
R1
20 kΩ
Audio Input+
GND
Shutdown
S1
C4
5 pF
OUT–
GND
OUT+
R3
40 kΩ
R2
20 kΩ
No
C5
10 µF
C3
1 µF
Shutdown
Bypass
SE/BTL
In
VO–
GND
VDD
VO+
8
7
6
5
1
2
3
4
GND
VDD
2.5 V to 5.5 V
+
SE/BTL
R4
20 kΩ