Texas Instruments TPA0242 - Manual (Page 15)

Quick Start List for Stand-Alone
2-5 Quick Start
2.3 Quick Start List for Stand-Alone
Follow these steps to use the TPA0242 EVM stand-alone or when connecting
it into existing circuits or equipment. Connections to the TPA0242 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 2–3 and details
appear in Chapter 3.
Figure 2–3. Quick Start Module Map
GND
ROUT+
ROUT–
SE/BTL S1
SHUTDOWN
GND
LOUT–
LOUT+
C11
C2
C13
VDD GND
L IN+
GND
L LINE–
L HP
VDD GND
R HP
R LINE–
GND
R IN+
C10
+
TPA00242 EVM Board
SLOP275
U1
+
TEXAS
INSTRUMENTS
R2
R1 PCBEEP
C1
C12
C6 C5 C4 R3 S2
C7 C8 C9
C3
SHUTDOWN
R4 S3 S4
HP/LINE
6
7
8
9
- 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 audio signal source level adjustments are set to minimum.
4) Connect the right (left) positive lead of the audio source to the module
R LINE– (L LINE–) pins and the negative lead to the R IN+ (L IN+) pins.
If using the headphone inputs, connect the positive audio source to the
module R HP (L HP) and the negative lead to R IN+ (L IN+). The inputs
can be used with a differential or single-ended audio source, but the
headphone and line have common positive inputs.
5) Select output mode:
a) For BTL output, connect a speaker to the module OUT+ and OUT–
pins of each channel,
or
b) For single-ended output, connect a headphone or a speaker to the
module OUT+ and GND pins of each channel through a 33
µ
F to
1000
µ
F output-coupling capacitor (Figure 3–10).