LM1876 Dual 20W Audio Power Amplifier IC

01 January 1970 User Review

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The LM1876 is a stereo audio amplifier capable of delivering typically 20W per channel of continuous average output power into a 4Ω or 8Ω load with less than 0.1% THD+N.

Each amplifier has an independent smooth transition fade-in/out mute and a power conserving standby mode which can be controlled by external logic.

The performance of the LM1876, utilizing its Self Peak Instantaneous Temperature (°Ke) ( SPiKe™) protection circuitry, places 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 safeguarded at the output against overvoltage, undervoltage, overloads, including thermal runaway and instantaneous temperature peaks. 


  • Dual 20W Audio Power Amplifier with Mute and Standby Modes
  • Spike Protection
  • Minimal amount of external components necessary
  • Quiet fade-in/out mute mode
  • Standby-mode
  • Isolated 15-lead TO-220 package


  • THD+N at 1 kHz at 2 x 15W continuous average output power into 4Ω or 8Ω:  0.1% (max)
  • THD+N at 1 kHz at continuous average output power of 2 x 20W into 8Ω:  0.009% (typ.)
  • Standby current:  4.2 mA (typ.)


  • Bridged Amplifier
  • Single-Supply Amplifier
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