TPA4861 www.ti.com SLOS163C – SEPTEMBER 1996 – REVISED JUNE 2004 1-W MONO AUDIO POWER AMPLIFIER
FEATURES D PACKAGE
(TOP VIEW) 1-W BTL Output (5 V, 0.11 % THD+N)
3.3-V and 5-V Operation
No Output Coupling Capacitors Required
Shutdown Control (IDD = 0.6 ВµA)
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 SHUTDOWN
BYPASS
IN+
IN– 1 8 2 7 3 6 4 5 VO2
GND
VDD
VO1 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 …
