Description
1-4

Introduction

1.2 Description
The TPA0103 Audio Power Amplifier Evaluation Module is a complete,
low-power three-channel audio power amplifier. It consists of the TI TPA0103
3-Channel Audio Power Amplifier IC along with a small number of other parts
mounted on a circuit board that measures approximately 2 inches by 1
inches (Figure 1–1).

Figure 1–1.The TI TPA0103 Audio Amplifier Evaluation Module

GND
ROUT+
HP/L*
COUT–
MODE A
SDWN
GND
COUT+
LOUT+
C1
C2
R6
GND
GND
LIN
LHP
C3
R16
C10C9
VDD GND
R9
C7
C6
RHP
RIN
GND
GND S3
S4
S5
R11
C11
+
S2
MODE B
R5
S1
C12
R18
R2
R1
R3
R13
R14
R4
C8
R15 R12
R7R8
R10
C5
TPA0103 EVM
REV. A
Lit.# SLOP103
–3
009228
R17
U1
Single in-line header pins are mounted to 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 TPA0103 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 auto-
matically 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 TPA0103 EVM Specifications
Supply voltage range, VDD 3 V to 5.5 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Supply current, IDD 1.5 A, max. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Continuous output power, PO: center channel, THD = 0.2%, 4-Ω BTL, VDD=5 V: 1.75 W. . . .
L/R channels, THD = 0.2%, 4-Ω SE, VDD=5 V: 535 mW. . . . . .
L/R channels, THD = 0.2%, 32-Ω SE, VDD=5 V: 100 mW. . . .
Audio input voltage, VI: L/R IN, gain = 2 – 22 BTL 0.75 VPP, max. . . . . . . . . . . . . . . . . .
L/R IN HP, gain = 1 4 VPP, max. . . . . . . . . . . . . . . . . . . . . . . . . .
Minimum load impedance, RL 4 Ω. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .