TPA122
150-mW STEREO AUDIO POWER AMPLIFIER
SLOS211C – AUGUST1998 – REVISED MARCH 2000
D OR DGN PACKAGE
(TOP VIEW)
150 mW Stereo Output
PC Power Supply Compatible
– Fully Specified for 3.3 V and 5 V
Operation
V 1
O
V
DD
1
2
3
4
8
7
6
5
IN–
BYPASS
GND
V 2
O
– Operation to 2.5 V
IN2–
Pop Reduction Circuitry
SHUTDOWN
Internal Mid-Rail Generation
Thermal and Short-Circuit Protection
Surface-Mount Packaging
– PowerPAD MSOP
– SOIC
Pin Compatible With LM4880 and LM4881
(SOIC)
description
The TPA122 is a stereo audio power amplifier packaged in either an 8-pin SOIC, or an 8-pin PowerPAD MSOP
package capable of delivering 150 mW of continuous RMS power per channel into 8-Ω loads. Amplifier gain
isexternallyconfiguredbymeansoftworesistorsperinputchannelanddoesnotrequireexternalcompensation
for settings of 1 to 10.
THD+N when driving an 8-Ω load from 5 V is 0.1% at 1 kHz, and less than 2% across the audio band of 20 Hz
to 20 kHz. For 32-Ω loads, the THD+N is reduced to less than 0.06% at 1 kHz, and is less than 1% across the
audiobandof20Hzto20kHz. For10-kΩ loads, theTHD+Nperformanceis0.01%at1kHz, andlessthan0.02%
across the audio band of 20 Hz to 20 kHz.
typical application circuit
320 kΩ
320 kΩ
V
8
1
R
DD
F
V
DD
Audio
Input
C
S
V
/2
DD
R
I
IN1–
2
3
V
1
O
O
–
+
C
I
C
C
BYPASS
IN2–
C
Audio
Input
B
R
I
6
5
V
2
7
4
–
+
C
I
C
C
From Shutdown
Control Circuit
SHUTDOWN
Bias
Control
R
F
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 ]
