Texas Instruments TPA0122, User Manual, Page: 9 / 34

Description
1-3 Introduction
1.2 Description
The TPA0122 stereo 2-W audio power amplifier evaluation module is a
complete, 2-watt per channel stereo audio power amplifier. It consists of the
TI TPA0122 stereo 2-W audio power amplifier IC along with a small number
of other parts mounted on a circuit board that measures approximately 2
¼
inches by 1
½
inches (Figure 1–1).
Figure 1–1. The TI TPA0122 Audio Amplifier Evaluation Module
GND
ROUT+
ROUT–
SE/BTL
S1
SHUTDOWN
GND
LOUT–
LOUT+
C10
C2
C12
VDD GND
L IN+
GND
L LINE–
L HP
VDD GND
R HP
R LINE–
GND
R IN+
C9
+
TPA0122 EVM Board
SLOP206
U1
+
S3
TEXAS
INSTRUMENTS
R3
R2
S2
R1
SHUTDOWN
TP2
TP1
C1
C1
1
C5 C4 C3 R4 R5 S4
C6 C7 C8
Single in-line header pins extend from the underside of the module circuit
board to allow the EVM to be plugged into the TI plug-n-play audio amplifier
evaluation platform, or to be wired directly into existing circuits and equipment
when used stand-alone.
The platform has room for a single TPA0122 evaluation module and is a
convenient vehicle for demonstrating TI’s audio power amplifier and related
evaluation modules. The EVMs simply plug into the platform, which
automatically provides power to the modules, interconnects them correctly,
and connects them to a versatile array of standard audio input and output jacks
and connectors. Easy-to-use configuration controls allow the platform and
EVMs to quickly model many possible end-equipment configurations.
There is nothing to build, nothing to solder, and nothing but the speakers
included with the platform to
hook up.
1.3 TPA0122 EVM Specifications
Supply voltage range, V
DD
4.5 V to 5.5 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Supply current, I
DD
2 A max . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Continuous output power per channel, P
O
: 3-
Ω
BTL, V
DD
= 5 V 2 W . . . . . . . . . . . . . . . . . . . . . . .
Audio input voltage, V
I,
: HP input 4.5 Vpp max . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Line input 4.5 Vpp max . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PC BEEP input 5 Vpp max . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Minimum load impedance, R
L
3
Ω
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .