TPA4861_07 Datasheet, PDF (1/23 Pages) Texas Instruments – 1-W MONO AUDIO POWER AMPLIFIER

www.ti.com
TPA4861
SLOS163C – SEPTEMBER 1996 – REVISED JUNE 2004
1-W MONO AUDIO POWER AMPLIFIER
FEATURES
• 1-W BTL Output (5 V, 0.11 % THD+N)
• 3.3-V and 5-V Operation
• No Output Coupling Capacitors Required
• Shutdown Control (I_DD = 0.6 µA)
• Uncompensated Gains of 2 to 20 (BTL Mode)
• Surface-Mount Packaging
• Thermal and Short-Circuit Protection
• High Supply Ripple Rejection Ratio (56 dB at
1 kHz)
• LM4861 Drop-In Compatible
D PACKAGE
(TOP VIEW)
SHUTDOWN 1
8
BYPASS 2
7
IN+ 3
6
IN– 4
5
V_O2
GND
V_DD
V_O1
DESCRIPTION
The TPA4861 is a bridge-tied load (BTL) audio power amplifier capable of delivering 1 W of continuous average
power into an 8-Ω load at 0.2% THD+N from a 5-V power supply in voiceband frequencies (f < 5 kHz). A BTL
configuration eliminates the need for external coupling capacitors on the output in most applications. Gain is
externally configured by means of two resistors and does not require compensation for settings of 2 to 20.
Features of the amplifier are a shutdown function for power-sensitive applications as well as internal thermal and
short-circuit protection. The TPA4861 works seamlessly with TI's TPA4860 in stereo applications. The amplifier
is available in an 8-pin SOIC surface-mount package that reduces board space and facilitates automated
assembly.
Audio
Input
R_F
R_I
4 ^IN–
C_I
3 IN+
C_B
V_DD/2
–
+
V_DD 6
V_O1 5
V_DD
C_S
1W
2 BYPASS
–
+
V_O2 8
1 ^SHUTDOWN
Bias
Control
7
GND
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.
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 © 1996–2004, Texas Instruments Incorporated