Texas Instruments TPA311 - Manual (Page 9)

Description
1-3 Introduction
1.2 Description
The TPA311 audio power amplifier evaluation module is a complete, low-pow-
er single-channel audio power amplifier. It consists of the TI TPA311 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 (Figure 1–1).
Figure 1–1. The TI TPA311 Audio Amplifier Evaluation Module
C4
R3
IN+
C2
Shutdown
R1
R2
C1
C5
C3
OUT–
GND
OUT+
GND
S1
GND VDD
R4
EVM
Literature #
SLOP116
U1
TPA311
SE\BTL*
R5
009227
–3
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 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
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .