LM4766

ACTIVE

Overture Series: Dual 40W Audio Amplifier with Mute

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Product details

Parameters

Audio input type Analog Input Architecture Class-AB Speaker channels (Max) Stereo Power stage supply (Max) (V) 60 Power stage supply (Min) (V) 20 Load (Min) (ohms) 4 Output power (W) 50 SNR (dB) 112 THD + N @ 1 kHz (%) 0.06 Iq (Typ) (mA) 24 Control interface Hardware Closed/open loop Open Analog supply (Min) (V) 20 Analog supply (Max) (V) 66 Power to parallel bridge tied load (Max) (W) 40 PSRR (dB) 125 Operating temperature range (C) 0 to 70 open-in-new Find other Speaker amps

Package | Pins | Size

TO-220 (NDL) 15 192 mm² 20.02 x 9.575 open-in-new Find other Speaker amps

Features

  • SPiKe Protection
  • Minimal Amount of External Components Necessary
  • Quiet Fade-In/Out Mute Mode
  • Non-Isolated 15-Lead TO-220 Package
  • Wide Supply Range 20V - 78V

Key Specifications

  • THD+N at 1kHz at 2 x 30W Continuous Average Output Power Into 8Ω 0.1% (Max)
  • THD+N at 1kHz at Continuous Average Output Power of 2 x 30W Into 8Ω 0.009% (Typ)

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Description

The LM4766 is a stereo audio amplifier capable of delivering typically 40W per channel with the non-isolated "NDL" package and 30W per channel with the isolated "NDB" package of continuous average output power into an 8Ω load with less than 0.1% (THD+N).

The performance of the LM4766, 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.

Each amplifier within the LM4766 has an independent smooth transition fade-in/out mute that minimizes output pops. The IC's extremely low noise floor at 2µV and its extremely low THD+N value of 0.06% at the rated power make the LM4766 optimum for high-end stereo TVs or minicomponent systems.

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Technical documentation

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Type Title Date
* Datasheet LM4766 Overture Audio Pwr Amp Series Dual 40W Audio Pwr Amp w/ Mute datasheet (Rev. F) Mar. 21, 2013
Application notes Guidelines for Measuring Audio Power Amplifier Performance (Rev. A) Aug. 26, 2019
Application notes AN-1849 An Audio Amplifier Power Supply Design (Rev. C) Jun. 27, 2019

Design & development

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Design tools & simulation

SIMULATION MODELS Download
SNAM059.ZIP (22 KB) - TINA-TI Spice Model
SIMULATION MODELS Download
SNAM060.TSC (899 KB) - TINA-TI Reference Design
SIMULATION MODELS Download
SNAM061A.ZIP (25 KB) - PSpice Model

CAD/CAE symbols

Package Pins Download
TO-220 (NDL) 15 View options

Ordering & quality

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