LM4950 - 7.5W Mono-BTL or 3.1W Stereo Audio Power Amplifier
Datasheet Packaging Samples & Pricing Application Notes Knowledge Base

Features
•Pop & click circuitry eliminates noise during turn-on and turn-off transitions
•Low current, active-low shutdown mode
•Low quiescent current
•Stereo 3.1W output, RL = 4
•Mono 7.5W BTL output, RL = 8
•Short circuit protection
•Unity-gain stable
•External gain configuration capability

Key Specification

Quiscent Power Supply Current16mA (typ)
POUT (SE) 
VDD = 12V, RL = 4, 1% THD+N3.1W (typ)
POUT (BTL) 
VDD = 12V, RL = 8, 10% THD+N7.5W (typ)
Shutdown current40µA (typ)

General Description

The LM4950 is a dual audio power amplifier primarily designed for demanding applications in flat panel monitors and TV's. More...


Applications

•Flat Panel Monitors
•Flat panel TV's
•Computer Sound Cards
  Typical Application
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ParametersValues
Power@ 4Ohms, 1% THD 3.1 Watt
Power@ 8Ohms, 10% THD 3.1 Watt
THD 0.14 %
PSRR 70 dB
Channels 2 Channels
Supply Range +9.6 - +16
THD Conditions Po=2.5Wrms,Av=10,f-1kHz,RL=4 ohm SE
PSRR Conditions Vripple=200mVpp,f=1kHz,RL=8 ohm BTL
User Supply 12 Volt
Shut down Yes
Shutdown Type Low
Mono/Stereo Stereo
Temperature Min -40 deg C
Temperature Max 85 deg C


Typical Performance

click for larger image


  Additional Resources
Application Notes


Connection Diagram

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Datasheet
RoHS Compliance Information Size in KbytesDate Click link below to Download
LM4950 Boomer ® Audio Power Amplifier Series 7.5W Mono-BTL or 3.1W Stereo Audio Power Amplifier 1447
Kbytes		 18-Aug-04 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
LM4950TATO-2209NOPB1NARoHS Download Full productionN/A
 
Buy Now 		1K+$1.19rail
of
45		NSUZXYTTE#
L4950TA
6 weeks500
LM4950TSTO-2639NOPB
STD		3
3		245
235		RoHS Download Full productionN/A
Samples
Buy Now 		1K+$1.19rail
of
45		NSUZXYTTE#
L4950TS
12 weeks1000
LM4950TSXTO-2639NOPB
STD		3
3		245
235		RoHS Download Full productionN/A
 
Buy Now 		1K+$1.19reel
of
500		NSUZXYTTE#
L4950TS
8 weeks2500

General Description

The LM4950 is a dual audio power amplifier primarily designed for demanding applications in flat panel monitors and TV's. It is capable of delivering 3.1 watts per channel to a 4 single-ended load with less than 1% THD+N or 7.5 watts mono BTL to an 8 load, with less than 10% THD+N from a 12VDC power supply.

Boomer audio power amplifiers were designed specifically to provide high quality output power with a minimal amount of external components. The LM4950 does not require bootstrap capacitors or snubber circuits. Therefore, it is ideally suited for display applications requiring high power and minimal size.

The LM4950 features a low-power consumption active-low shutdown mode. Additionally, the LM4950 features an internal thermal shutdown protection mechanism along with short circuit protection.

The LM4950 contains advanced pop & click circuitry that eliminates noises which would otherwise occur during turn-on and turn-off transitions.

The LM4950 is a unity-gain stable and can be configured by external gain-setting resistors.

More Application Notes

TitleSize in Kbytes Date Click link below to Download
AN-1441: Application Note 1441 LM4962 Evaluation Board 840
Kbytes		 20-Apr-06 Download
AN-1440: Application Note 1440 LM4962 Stereo Ceramic Speaker Driver Application Note 760
Kbytes		 20-Apr-06 Download
AN-1440 (Chinese): Application Note 1440 LM4962 Stereo Ceramic Speaker Driver Application Note
 548 Kbytes  

If you have trouble printing or viewing PDF file(s), see Printing Problems.

[Information as of 8-Nov-2009]