Datasheet

Description
1-3
Introduction
1.2 Description
The TPA321 audio power amplifier evaluation module is a complete, low pow-
er single-channel audio power amplifier. It consists of the TI TPA321 350-mW
low-voltage audio power amplifier IC along with a small number of other parts
mounted on a circuit board that is approximately one and a quarter inches
square (see Figure 1–1).
Figure 1–1. The TI TPA321 Audio Amplifier Evaluation Module
OUT+
IN–
GND
VDD GND
U1
†
Shutdown
R5
OUT–
GND
C4
TEXAS
INSTRUMENTS
SLOP341
TPA321 MSOP EVM
C6
C5
S1
R1
+
R2
C2
C1
R3
R4
C3
Single in-line header pins are mounted to the underside of the module circuit
board. These pins 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 pair of TPA321 evaluation modules 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 TPA321 EVM Specifications
Supply voltage range, V
DD
2.5 V to 5.5 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Supply current, I
DD
250 mA, max. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Continuous output power, P
O
:8-Ω BTL, V
DD
=5 V 350 mW. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
32-Ω BTL, V
DD
=5 V 75 mW. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Audio input voltage, V
I
2 Vpp, max. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Minimum load impedance, R
L
8 Ω. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .