Texas Instruments TPA751 MSOP - Manual (Page 9)

Description
1-3 Introduction
1.2 Description
The TPA751 MSOP Audio Power Amplifier Evaluation Module is a complete,
low-power single-channel audio power amplifier. It consists of the TI TPA751
700-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 (see Figure 1–1).
Figure 1–1. The TI TPA751 Audio Amplifier Evaluation Module
OUT+
IN–
IN+
VDD GND
U1 †
Shutdown
R5
OUT–
GND
C4
TEXAS
INSTRUMENTS
SLOP357
TPA751 MSOP EVM
C5
S1
R1
+
R2
C2
C1
R3
R4
C3
† Due to the very small size of the MSOP IC package, the standard part number TPA751 is
replaced with the code TIATC.
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, with room for a pair of TPA751 evaluation modules, 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 TPA751 EVM Specifications
Supply voltage range, V
DD
2.5 V to 5.5 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Supply current, I
DD
450 mA, max . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Continuous output power, P
O
: 8-
Ω
BTL, V
DD
= 5 V 700 mW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Audio input voltage, V
I
2 Vpp, max . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Minimum load impedance, R
L
8
Ω
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .