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Description
1-3
Introduction
1.2 Description
The TPA311 MSOP audio power amplifier evaluation module is a complete,
low-power single-channel audio power amplifier. It consists of the TI TPA311
350-mW low-voltage audio power amplifier IC in a very small MSOP package,
along with a small number of other parts mounted on a circuit board that is
approximately one and a quarter inches square (Figure 1–1).
Figure 1–1. The TI TPA311 Audio Amplifier Evaluation Module
OUT+
IN+
GND
Vdd GND
U1
†
R2
Shutdown
R3
OUT–
GND
C5
TEXAS
INSTRUMENTS
SLOP123
TPA311 MSOP EVM
C4
C1
C2
R4
SE\BTL*
C3
S1
R1
+
†
Due to the very small size of the MSOP IC package, the standard part number TPA311 is replaced with the code TIAAB
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 pair of TPA311 MSOP 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 TPA311 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. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .