LM4782 - 3 Channel 25W Audio Power Amplifier with Mute and Standby
Datasheet Packaging Samples & Pricing Eval. Boards Reliability Knowledge Base

Features
•SPiKe Protection
•Low external component count
•Quiet fade-in/out mute mode
•Low power standby mode
•Wide supply range: 20V - 64V
•Signal-to-Noise Ratio >= 98dB (ref. to PO = 1W)

Key Specification

Output Power/Channel with 0.5% THD+N, 1kHz into 825W (typ)
THD+N at 3x15W into 8 (20Hz - 20kHz)0.2% (typ)
THD+N at 3x15W into 6 (20Hz - 20kHz)0.3% (typ)
THD+N at 3x15W into 4 (20Hz - 20kHz)0.4% (typ)
Mute Attenuation115dB (typ)
PSRR85dB (min)
Slew Rate18V/µs (typ)

General Description

The LM4782 is a three channel audio amplifier capable of typically delivering 25W per channel of continuous average output power into an 8 load with less than 0.5% THD+N from 20Hz - 20kHz. More...


Applications

•Audio amplifier for component stereo
•Audio amplifier for compact stereo
•Audio amplifier for home theater in a box (HTB)
•Audio amplifier for self-powered speakers
•Audio amplifier for high-end and HD TVs
  Typical Application
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ParametersValues
Power@ 4Ohms, 1% THD 32 Watt
Power@ 8Ohms, 1% THD 25 Watt
Power@ 4Ohms, 10% THD 40 Watt
Power@ 8Ohms, 10% THD 30 Watt
THD 0.2 %
PSRR 115 dB
SNR 98 dB
Channels 3 Channels
THD Conditions Po=15W, f=20kHz, Av=26dB, V=25V, Rl=8Ohms
PSRR Conditions V+=25V-10V,V-=-25V Vcm=0V, Io=0mA
SNR Conditions Po=1Wrms;A-Weighted Filter;fin=1kHz, Rs=25Ohms
User Supply 25 Volt
Supply Range +20 - +64V
Mute/Shutdown Mute and standby
Mono/Stereo 3 Ch
Gain Bandwidth 7.5 MHz
Slew Rate 18 Volts/usec
Temperature Min -20 deg C
Temperature Max 85 deg C


Typical Performance

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  Connection Diagram
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Datasheet
RoHS Compliance Information Size in KbytesDate Click link below to Download
LM4782 Overture™ Audio Power Amplifier Series 3 Channel 25W Audio Power Amplifier with Mute and Standby 1542
Kbytes		 23-Mar-06 Download

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Package Availability, Models, Samples & Pricing
Part NumberPackageFactory Lead TimeModelsSamples &
Electronic
Orders		Budgetary PricingStd
Pack
Size		Package
Marking
Format
TypePinsSpec.MSL
Rating		Peak
Reflow		RoHS
Report		CAD
Symbols		WeeksQtyQty$US each
LM4782TABD3 Channel 25W Audio Power Amplifier with Mute and StandbyFull productionN/A
 
Buy Now 		1+$171.001-
6 weeksN/A
LM4782TATO-22027NOPB1NARoHS Download Full productionN/A
 
Buy Now 		1K+$6.86rail
of
15		NSUZXYTTE#
LM4782TA
16 weeks500

General Description

The LM4782 is a three channel audio amplifier capable of typically delivering 25W per channel of continuous average output power into an 8 load with less than 0.5% THD+N from 20Hz - 20kHz.

The LM4782 is fully protected utilizing National's Self Peak Instantaneous Temperature (°Ke) (SPiKeTM) protection circuitry. SPiKe provides a dynamically optimized Safe Operating Area (SOA). SPiKe protection completely safeguards the LM4782's outputs against over-voltage, under-voltage, overloads, shorts to the supplies or GND, thermal runaway and instantaneous temperature peaks. The advanced protection features of the LM4782 places it in a class above discrete and hybrid amplifiers.

Each amplifier of the LM4782 has an independent smooth transition fade-in/out mute and a power conserving standby mode. The mute and standby modes can be controlled by external logic.

The LM4782 can easily be configured for bridge or parallel operation for higher power and bi-amp solutions.

Reliability Metrics

Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)
LM4782TAHV7000138500014925003423500950

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.


[Information as of 8-Nov-2009]