Texas Instruments SLOU020A - Manual (Page 14)

Quick Start List for Stand-Alone
2-4 Quick Start
2.3 Quick Start List for Stand-Alone
Follow these steps to use the TPA311 MSOP EVM stand-alone or when
connecting it into existing circuits or equipment. Connections to the TPA311
MSOP 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
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
+ 5
2
6 7
4
† Due to the very small size of the MSOP IC package, the standard part number TPA311 is replaced with the code TIAAB
- 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 the signal source level is 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
µ
F to 1000
µ
F 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 as needed.