Texas Instruments TPA301 - Manual (Page 14)

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 TPA301 EVM stand-alone or when
connecting it into existing circuits or equipment. Connections to the TPA301
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
C4
R3
IN+
C2
Shutdown
R1
R2
C1
C6
C3 C5
R5
DL
OUT–
GND
OUT+
GND
S1
GND +5 V
R4
EVM
–3
Lit.#
SLOP 115
U1
TPA301
5
2
Gain Adjust
6 7
4
- 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 +5V
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
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 and EVM gain level (R4) as needed