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Quick Start List for Stand-Alone
2-4
Quick Start
2.3 Quick Start List for Stand-Alone
Use the following steps to use the TPA311 EVM stand-alone or when
connecting it into existing circuits or equipment. Connections to the TPA311
module header pins can be made via individual sockets, wire-wrapping, or
soldering to the pins, either on the top or the bottom of the module circuit board.
Numbered callouts for selected steps are shown in Figure 2–2 and details
appear in Chapter 3.
Figure 2–2.
Quick Start Module Map
5
2
Gain Adjust
6
7
4
C4
R3
IN+
C2
Shutdown
R1
R2
C1
C5
C3
OUT–
GND
OUT+
GND
S1
GNDVDD
R4
EVM
Literature #
SLOP116
U1
TPA311
SE\BTL*
R5
009227
–3
Power supply
1) Ensure that all external power sources are set to
OFF
2) Connect an external regulated power supply set to 5 V to the module VDD
and GND pins taking care to observe marked polarity
Inputs and outputs
3) Ensure that signal source level adjustments and EVM gain (R4) are set to
minimum
4) Connect the audio source to the module IN+ and GND pins taking care to
observe marked polarity
5) Connect the Shutdown pin to V
DD
through a Normally Open switch
6) For BTL output, connect an 8-Ω – 32-Ω speaker to the module OUT+ and
OUT– pins, or
7) For single-ended output, connect a headphone or an 8-Ω – 32-Ω speaker
to the module OUT+ and GND pins through a 33 µF to 1000 µF output-
coupling capacitor (figure 3–9)
Power-up
8) Verify correct voltage and input polarity and set the external power supply
to
ON
The EVM should begin operation.
9) Adjust the signal source level and EVM gain level (R4) as needed