SNAS054E – FEBRUARY 2000 – REVISED MAY 2013
1.1W Audio Power Amplifier with Logic Low
Check for Samples: LM4876
•2 Does Not Require Output Coupling Capacitors,
Bootstrap Capacitors, Or Snubber Circuits
• 10-pin VSSOP and 8-pin SOIC Packages
• Unity-Gain Stable
• External Gain Set
• Mobile Phones
• Portable Computers
• Desktop Computers
• Low-Voltage Audio Systems
• THD+N at 1kHz for 1W Continuous Average
Output Power into 8Ω 0.5% (max)
• Output Power At 1kHz Into 8Ω with 10%
THD+N 1.5 W (typ)
• Shutdown Current 0.01µA (typ)
• Supply Voltage Range 2.0V to 5.5 V
The LM4876 is a single 5V supply bridge-connected
audio power amplifier capable of delivering 1.1W (typ)
of continuous average power to an 8Ω load with 0.5%
Like other audio amplifiers in the Boomer series, the
LM4876 is designed specifically to provide high
quality output power with a minimal amount of
external components. The LM4876 does not require
output coupling capacitors, bootstrap capacitors, or
snubber networks. It is perfectly suited for low-power
The LM4876 features an active low externally
controlled, micro-power shutdown mode. Additionally,
the LM4876 features an internal thermal shutdown
protection mechanism. For PCB space efficiency, the
LM4876 is available in VSSOP and SOIC surface
The unity-gain stable LM4876's closed loop gain is
set using external resistors.
Figure 1. Typical LM4876 Audio Amplifier Application Circuit
Numbers in ( ) are specific to the 10-pin VSSOP package.
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