Texas Instruments TPA311 - Manual (Page 17)

The TPA311 Audio Power Amplifier Evaluation Module
3-3 Details
3.2 The TPA311 Audio Power Amplifier Evaluation Module
The TPA311 audio power amplifier evaluation module is powered by a TPA311
350-mW low-power audio amplifier IC and includes on-board gain adjustment,
a shutdown control signal input with on-board 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 to 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 EVM
C4
R3
IN+
C2
Shutdown
R1
R2
C1
C5
C3
OUT–
GND
OUT+
GND
S1
GND VDD
R4
EVM
Literature #
SLOP116
U1
TPA311
SE\BTL*
R5
009227
–3
Figure 3–3. TPA311 EVM Schematic Diagram
C2
2.2
µ
F
C1
1
µ
F
R1
20 k
Ω
Audio Input+
GND
Shutdown
S1
C4
5 pF
OUT–
GND
OUT+
R3
20 k
Ω
R4
200 k
Ω
R2
20 k
Ω
No
C5
10
µ
F
C3
2.2
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
R5
100 k
Ω