1FEATURES
23• 40W Continuous Average Output Power Into
8Ω
• 75W Instantaneous Peak Output Power
Capability
• Signal-to-Noise Ratio ≥ 95 dB(min)
• An Input Mute Function
• Output Protection From A Short to Ground Or
to the Supplies Via Internal Current Limiting
Circuitry
• Output Over-Voltage Protection Against
Transients From Inductive Loads
• Supply Under-Voltage Protection, Not Allowing
Internal Biasing to Occur When |VEE| + |VCC| ≤
12V, Thus Eliminating Turn-On and Turn-Off
Transients
• 11-Lead PFM Package
• Wide Supply Range 20V - 72V

APPLICATIONS
• Component Stereo
• Compact Stereo
• Self-Powered Speakers
• Surround-Sound Amplifiers
• High-End Stereo TVs

DESCRIPTION
The LM2876 is a high-performance audio power
amplifier capable of delivering 40W of continuous average power to an 8Ω load with 0.1% THD+N from
20Hz–20kHz.
The performance of the LM2876, utilizing its Self Peak Instantaneous Temperature (°Ke) (SPiKe)
protection circuitry, puts it in a class above discrete
and hybrid amplifiers by providing an inherently,
dynamically protected Safe Operating Area (SOA).
SPiKe protection means that these parts are
completely safeguarded at the output against
overvoltage, undervoltage, overloads, including shorts
to the supplies, thermal runaway, and instantaneous
temperature peaks.
The LM2876 maintains an excellent signal-to-noise
ratio of greater than 95dB (min) with a typical low
noise floor of 2.0μV. It exhibits extremely low THD+N
values of 0.06% at the rated output into the rated
load over the audio spectrum, and provides excellent
linearity with an IMD (SMPTE) typical rating of
0.004%.