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LM4731  Product Folder

Stereo 25W Audio Power Amplifier with Mute and Standby Modes
Generic P/N 4731
General
Description		 Features Datasheet Package
& Models		 Samples
& Pricing		 Reliability
Metrics

Parametric Table Parametric Table
Temperature Min (deg C) -20 
Temperature Max (deg C) 85 
Channels (Channels) 2 
User Supply (Volt) 44 
Supply Range ± 15 - ± 28 V 
Gain Bandwidth (MHz) - 
Slew Rate (Volts/usec) 18 
PowerAtFourOhms OnePercentTHD (Watt) 20 
PowerAtEightOhms OnePercentTHD (Watt) 20 
PowerAtFourOhms TenPercentTHD (Watt) 25 
PowerAtEightOhms TenPercentTHD (Watt) 25 
SNR (dB) - 
SNR Conditions 50 
PSRR (dB) vrip=1vrms, f=120Hzsine, terminated to gnd 
PSRR Conditions .03 
THD (%) P=1W, f=1kHz, 18V, 4ohms 
THD Conditions  

Datasheet

TitleSize in KbytesDate
View Online
Download
Receive via Email
LM4731 Stereo 25W Audio Power Amplifier with Mute and Standby Modes 640 Kbytes 25-Jul-03 View Online Download Receive via Email

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Package Availability, Models, Samples & Pricing

Part NumberPackageStatusModelsSamples &
Electronic
Orders		Budgetary PricingStd
Pack
Size		Package
Marking
TypePinsMSL/Lead-Free AvailabilityLead
Time		QtySPICEIBISQty$US each
LM4731TATO 22015StatusFull productionN/AN/A24 Hour Samples
Buy Now 		1K+$1.03rail
of
20		NSUZXYTT
LM4731TA
8-10 weeks100000

General Description

The LM4731 is a stereo audio amplifier capable of delivering typically 25W per channel of continuous average output power into a 4 or 8 load with less than 10% THD+N from 20Hz - 20kHz.

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 LM4731 has short circuit protection and a thermal shut down feature that is activated when the die temperature exceeds 150°C. The LM4731 also has a under voltage lock out feature for click and pop free power off and on.

The LM4731 has a wide operating supply range from +/-10V - +/-28V allowing for lower cost unregulated power supplies to be used.

Features

  • Minimal amount of external components necessary
  • Quiet fade-in/out mute mode
  • Low current Standby-mode

Key Specification

Output Power into 4 or 8, 10% THD+N25W (typ)
THD+N at 1kHz with 2 x 1W into 80.02% (typ)
Mute Attenuation85dB (typ)
PSRR with fRIPPLE = 120Hz, 
VRIPPLE = 1VRMS50dB (typ)
Slew Rate18V/µs (typ)
Standby Current (+/-22V)4.8mA (typ)

Applications

  • Audio amplifier for high-end stereo TVs
  • Audio amplifier for component stereo
  • Audio amplifier for compact stereo
  • Audio amplifier for PC satellite speaker systems
  • Audio amplifier for self powered speakers

Reliability Metrics

Part Number Process Early Failure Rate - Rejects Sample Size (EFR) PPM * Rel. Rejects Device Hours Long Term Failure Rates (FITS) MTTF
LM4731TAHV70008800006000006169643205

For more information on Reliablitity Metrics, please click here.


[Information as of 15-Jan-2004]

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