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%.