LM2876 - High-Performance 40 Watt Audio Power Amplifier w/Mute

Datasheet	Packaging	Samples & Pricing	Eval. Boards	Reliability	Application Notes	Knowledge Base

Features

•	40W continuous average output power into 8
•	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 \|V_EE\| + \|V_CC\| <= 12V, thus eliminating turn-on and turn-off transients
•	11-lead TO-220 package
•	Wide supply range 20V - 72V

General Description

The LM2876 is a high-performance audio power amplifier capable of delivering 40W 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

click for larger image

Parameters Values

Power@ 8Ohms, 1% THD 45 Watt

Power@ 8Ohms, 10% THD 50 Watt

THD 0.06 %

PSRR 125 dB

SNR 98 dB

Channels 1 Channels

THD Conditions Po=25W @ Vs=±30V

PSRR Conditions V+=30V to 10V, V-=-30V

SNR Conditions Po=1W, Rs=25 Ohms

User Supply 30 Volt

Supply Range +20 - +60V

Mute/Shutdown Mute

Mono/Stereo Mono

Gain Bandwidth 8 MHz

Slew Rate 9 Volts/usec

Temperature Min -20 deg C

Temperature Max 85 deg C

Typical Performance

*click for larger image

Additional Resources

Online Seminars

The Use and Abuse of Amplifiers

Application Notes

Connection Diagram

click for larger image

Datasheet

RoHS Compliance Information	Size in Kbytes	Date
LM2876 Overture™ Audio Power Amplifier Series High-Performance 40W Audio Power Amplifier w/Mute	663 Kbytes	14-Oct-04	Download
LM2876 Overture™ Audio Power Amplifier Series High-Performance 40W Audio Power Amplifier w/Mute (Japanese)	322 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

LM4733TABD

High-Performance 40 Watt Audio Power Amplifier w/Mute

Full production

N/A

$200.00

6 weeks

N/A

LM4781TABD

High-Performance 40 Watt Audio Power Amplifier w/Mute

Full production

N/A

$170.00

6 weeks

N/A

LM2876TF

ISOLATED TO220

NOPB

RoHS

N/A

Full production

N/A

1K+

$2.76

rail
of
20

NSUZXYTTE#
LM2876TF

6 weeks

2000

Obsolete Versions

Obsolete Part	Alternate Part or Supplier	Source	Last Time Buy Date
LM2876T	NONE	NATIONAL SEMICONDUCTOR	05 Mar 2008

General Description

The LM2876 is a high-performance audio power amplifier capable of delivering 40W of continuous average power to an 8 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%.

Reliability Metrics

Part Number	Process	EFR Reject	EFR Sample Size	PPM	LTA Rejects	LTA Device Hours	FITS	MTTF (Hours)
LM2876T	HV700	0	13850	0	0	1492500	3	423500950
LM2876TF	HV700	0	13850	0	0	1492500	3	423500950

Note: The Early Failure Rates (EFR) were calculated as point estimate PPM based on rejects and sample size for EFR. The Long Term Failure Rates were calculated at 60% confidence using the Arrhenius equation at 0.7eV activation energy and derating the assumed stress temperature of 150°C to an application temperature of 55°C.

For more information on Reliability Metrics, please click here.

More Application Notes

Title	Size in Kbytes	Date
AN-147: AN-147 Low Cost IC Stereo Receiver	140 Kbytes	4-Oct-04	Download

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[Information as of 7-Nov-2009]