TPA122 Datasheet, PDF (1/28 Pages) Texas Instruments – 150-mW STEREO AUDIO POWER AMPLIFIER

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TPA122
SLOS211E – AUGUST 1998 – REVISED JUNE 2004
150-mW STEREO AUDIO POWER AMPLIFIER
FEATURES
• 150-mW Stereo Output
• PC Power Supply Compatible
– Fully Specified for 3.3-V and 5-V Operation
– Operation to 2.5 V
• Pop Reduction Circuitry
• Internal Midrail Generation
• Thermal and Short-Circuit Protection
• Surface-Mount Packaging
– PowerPAD™ MSOP
– SOIC
• Pin Compatible With LM4880 and LM4881
(SOIC)
D OR DGN PACKAGE
(TOP VIEW)
V_O1
1
8
V_DD
IN1− 2
7
V_O2
BYPASS 3
6
IN2 −
GND 4
5
SHUTDOWN
TYPICAL APPLICATION CIRCUIT
DESCRIPTION
The TPA122 is a stereo audio power amplifier pack-
aged 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 is externally configured by
means of two resistors per input channel and does
not require external compensation 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 audio band of 20 Hz to 20 kHz. For 10-kΩ
loads, the THD+N performance is 0.01% at 1 kHz,
and less than 0.02% across the audio band of 20 Hz
to 20 kHz.
Audio
Input
R_I
C_I
Audio
Input
C_B
R_I
C_I
R_F
320 kΩ
2 ^IN1–
3 ^BYPASS
6 ^IN2–
From Shutdown
Control Circuit
5 ^SHUTDOWN
R_F
320 kΩ
V_DD/2
–
+
V_DD 8
V_O1 1
–
V_O2 7
+
Bias
4
Control
V_DD
C_S
C_C
C_C
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.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 1998–2004, Texas Instruments Incorporated