LM3876 - High-Performance 56W Audio Power Amplifier with Mute

Datasheet	Packaging	Samples & Pricing	Knowledge Base

Features

•	56W continuous average output power into 8
•	100W 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 \|V_EE\| + \|V_CC\| <= 12V, thus eliminating turn-on and turn-off transients
•	11-lead TO-220 package
•	Wide supply range 20V - 94V

General Description

The LM3876 is a high-performance audio power amplifier capable of delivering 56W of continuous average power to an 8

load with 0.1% THD+N from 20Hz-20kHz.

Applications

•	Component stereo
•	Compact stereo
•	Self-powered speakers
•	Surround-sound amplifiers
•	High-end stereo TVs

Typical Application

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Parametric Table expand

Parametric Table collapse

Power@ 4Ohms, 1% THD 60 Watt

Power@ 8Ohms, 1% THD 45 Watt

Power@ 8Ohms, 10% THD 56 Watt

THD 0.06 %

SNR 98 dB

Channels 1 Channels

THD Conditions Po=40W @ Vs=±35V

PSRR Conditions Undefined

SNR Conditions Undefined

Power@ 4Ohms, 1% THD 60 Watt

Power@ 8Ohms, 1% THD 45 Watt

Power@ 8Ohms, 10% THD 56 Watt

THD 0.06 %

SNR 98 dB

Channels 1 Channels

THD Conditions Po=40W @ Vs=±35V

PSRR Conditions Undefined

SNR Conditions Undefined

User Supply 35 Volt

Supply Range +24 - +84V

Mute/Shutdown Mute

Gain Bandwidth 8 MHz

Slew Rate 11 Volts/usec

Temperature Min -20 deg C

Temperature Max 85 deg C

View Using Catalog

Typical Performance

*click for larger image

Connection Diagram

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Datasheet

RoHS Compliance Information	Size in Kbytes	Date
LM3876 Overture™ Audio Power Amplifier Series High-Performance 56W Audio Power Amplifier w/Mute	1045 Kbytes	4-Nov-04	Download
LM3876 Overture™ Audio Power Amplifier Series High-Performance 56W Audio Power Amplifier w/Mute (Japanese)	324 Kbytes

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Package Availability, Models, Samples & Pricing

Part Number

Package

Factory Lead Time

Models

Samples &
Electronic
Orders

Budgetary Pricing

Std
Pack
Size

Package
Marking
Format

Type

Pins

Spec.

MSL
Rating

Peak
Reflow

RoHS
Report

CAD
Symbols

Weeks

Qty

$US each

LM3876T

TO-220

STD

NOPB

RoHS

N/A

Full production

N/A

1K+

$3.24

rail
of
20

NSUZXYTTE#
LM3876T

12 weeks

500

LM3876TF

ISOLATED TO220

NOPB

RoHS

N/A

Full production

N/A

1K+

$3.46

rail
of
20

NSUZXYTTE#
LM3876TF

12 weeks

500

General Description

The LM3876 is a high-performance audio power amplifier capable of delivering 56W of continuous average power to an 8 load with 0.1% THD+N from 20Hz-20kHz.

The performance of the LM3876, 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 LM3876 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%.

Application Notes

Title	Size in Kbytes	Date
AN-898: Application Note 898 Audio Amplifiers Utilizing: SPiKe Protection	1412 Kbytes	20-Sep-02	Download
AN-898 (Japanese): Application Note 898 Audio Amplifiers Utilizing: SPiKe Protection	249 Kbytes

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[Information as of 3-Jul-2009]