LM4861 - 1.1W Audio Power Amplifier with Shutdown Mode
Datasheet Packaging Samples & Pricing Reliability Knowledge Base

Features
•No output coupling capacitors, bootstrap capacitors, or snubber circuits are necessary
•Small Outline (SO) packaging
•Compatible with PC power supplies
•Thermal shutdown protection circuitry
•Unity-gain stable
•External gain configuration capability

Key Specification

THD+N for 1kHz at 1W continuous average output power into 81.0% (max)
Output power at 10% THD+N at 1kHz into 8 1.5W (typ)
Shutdown Current0.6µA (typ)

General Description

The LM4861 is a bridge-connected audio power amplifier capable of delivering 1.1W of continuous average power to an 8 load with 1% THD+N using a 5V power supply.

Boomer audio power amplifiers were designed specifically to provide high quality output power with a minimal amount of external components using surface mount packaging. More...


Applications

•Personal computers
•Portable consumer products
•Self-powered speakers
•Toys and games
  Typical Application
click for larger image


ParametersValues
Power@ 4Ohms, 1% THD 1.55 Watt
Power@ 8Ohms, 1% THD 1.15 Watt
Power@ 4Ohms, 10% THD 1.9 Watt
Power@ 8Ohms, 10% THD 1.5 Watt
THD 0.72 %
PSRR 65 dB
SNR 98 dB
Channels 1 Channels
Supply Range +2.0 - +5.5 V
THD Conditions Po=1W @ Vs=5V, R=8 ohms
SNR Conditions Pout=1W
User Supply 5 Volt
Shutdown Type High
Temperature Min -40 deg C
Temperature Max 85 deg C


Typical Performance

click for larger image


  Also Recommended
LM4834▲Combines Functionality Of The LM4861 And LM4880
Connection Diagram
click for larger image



Datasheet
RoHS Compliance Information Size in KbytesDate Click link below to Download
LM4861 Boomer ® Audio Power Amplifier Series 1.1W Audio Power Amplifier with Shutdown Mode 278
Kbytes		 4-Feb-03 Download
LM4861 Boomer ® Audio Power Amplifier Series 1.1W Audio Power Amplifier with Shutdown Mode (Japanese)
 260 Kbytes   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
LM4861MSOIC NARROW8NOPB
STD		1
1		260
235		RoHS N/A Full productionN/A
Samples
Buy Now 		1K+$0.64rail
of
95		NSZXTT
LM
4861M
6 weeks2000
LM4861MXSOIC NARROW8NOPB
STD		1
1		260
235		RoHS N/A Full productionN/A
 
Buy Now 		1K+$0.64reel
of
2500		NSZXTT
LM
4861M
6 weeks3000

General Description

The LM4861 is a bridge-connected audio power amplifier capable of delivering 1.1W of continuous average power to an 8 load with 1% THD+N using a 5V power supply.

Boomer audio power amplifiers were designed specifically to provide high quality output power with a minimal amount of external components using surface mount packaging. Since the LM4861 does not require output coupling capacitors, bootstrap capacitors, or snubber networks, it is optimally suited for low-power portable systems.

The LM4861 features an externally controlled, low-power consumption shutdown mode, as well as an internal thermal shutdown protection mechanism.

The unity-gain stable LM4861 can be configured by external gain-setting resistors for differential gains of up to 10 without the use of external compensation components. Higher gains may be achieved with suitable compensation.

Reliability Metrics

Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)
LM4861MCS065238968520440200011249079519
LM4861MXCS065238968520440200011249079519

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]