TPA301
350-mW MONO AUDIO POWER AMPLIFIER
SLOS208C – JANUARY1998 – REVISED MARCH 2000
D OR DGN PACKAGE
(TOP VIEW)
Fully Specified for 3.3-V and 5-V Operation
Wide Power Supply Compatibility
2.5 V – 5.5 V
SHUTDOWN
BYPASS
IN+
V –
O
GND
1
2
3
4
8
7
6
5
Output Power for R = 8 Ω
L
– 350 mW at V
– 250 mW at V
= 5 V, BTL
DD
DD
V
DD
= 3.3 V, BTL
IN–
V +
O
Ultra-Low Quiescent Current in Shutdown
Mode . . . 0.15 µA
Thermal and Short-Circuit Protection
Surface-Mount Packaging
– SOIC
– PowerPAD MSOP
description
The TPA301 is a bridge-tied load (BTL) audio power amplifier developed especially for low-voltage applications
where internal speakers are required. Operating with a 3.3-V supply, the TPA301 can deliver 250-mW of
continuous power into a BTL 8-Ω load at less than 1% THD+N throughout voice band frequencies. Although
this device is characterized out to 20 kHz, its operation was optimized for narrower band applications such as
cellular communications. The BTL configuration eliminates the need for external coupling capacitors on the
output in most applications, which is particularly important for small battery-powered equipment. This device
featuresashutdownmodeforpower-sensitiveapplicationswithaquiescentcurrentof0.15µAduringshutdown.
The TPA301 is available in an 8-pin SOIC surface-mount package and the surface-mount PowerPAD MSOP,
which reduces board space by 50% and height by 40%.
V
6
5
DD
V
R
DD
F
C
S
V
DD
/2
Audio
Input
1 µF
R
I
IN –
IN+
4
3
V
O
+
–
+
C
I
2
BYPASS
C
B
0.1 µF
–
+
350 mW
V
O
–
8
7
GND
SHUTDOWN
1
Bias
Control
From System Control
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PowerPAD is a trademark of Texas Instruments.
Copyright 2000, Texas Instruments Incorporated
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TI [ TEXAS INSTRUMENTS ]
