LM4992 - 420mW Stereo Cell Phone Audio Amplifier

Datasheet Packaging Samples & Pricing Eval. Boards Reliability Knowledge Base

Features
Available in space-saving LLP package
Ultra low current shutdown mode
BTL output can drive capacitive loads
Improved pop & click circuitry eliminates noise during turn-on and turn-off transitions
2.2 - 5.5V operation
No output coupling capacitors, snubber networks or bootstrap capacitors required
Unity-gain stable
External gain configuration capability

Key Specification


Improved PSRR at 217Hz & 1KHz 64dB (1KHz)
Stereo Output Power at 5.0V, 1% THD, 81.07W (typ)
Stereo Output Power at 3.3V, 1% THD, 8420mW (typ)
Shutdown Current, Vdd = 3.3V0.2µA (typ)

General Description


The LM4992 is a stereo audio power amplifier primarily designed for demanding applications in mobile phones and other portable communication device applications. More...


Applications


Mobile Phones
PDAs
Portable electronic devices
  Typical Application
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Parametric Table     expand
Parametric Table    collapse
Power@ 8Ohms, 1% THD 1.07 Watt
THD 0.15 %
PSRR 55 dB
Channels 2 Channels
Supply Range +2.2 - +5.5 V
THD Conditions Vdd 5V, Po 0.5Wrms, f 1kHz
PSRR Conditions Vr 200mV, Vdd 5V, terminated with 10ohm
Power@ 8Ohms, 1% THD 1.07 Watt
THD 0.15 %
PSRR 55 dB
Channels 2 Channels
Supply Range +2.2 - +5.5 V
THD Conditions Vdd 5V, Po 0.5Wrms, f 1kHz
PSRR Conditions Vr 200mV, Vdd 5V, terminated with 10ohm
User Supply 5 Volt
Shutdown Type Low
Temperature Min -40 deg C
Temperature Max 85 deg C
View Using Catalog


Typical Performance


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  Connection Diagram
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Datasheet
RoHS Compliance Information Size in KbytesDate Click link below to Download
LM4992 Boomer ® Audio Power Amplifier Series 420mW Stereo Cell Phone Audio Amplifier 576 Kbytes 20-Feb-04 Download

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


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
LM4992SDBD420mW Stereo Cell Phone Audio AmplifierFull productionN/A
 
Buy Now
1+$200.001-
6 weeksN/A
LM4992SDLLP14NOPB1260RoHS Download Full productionN/A
Samples
Buy Now
1K+$0.70reel
of
1000
ZXYTT
L4992
6 weeks1000
LM4992SDXLLP14NOPB1260RoHS Download Full productionN/A
 
Buy Now
1K+$0.70reel
of
4500
ZXYTT
L4992
6 weeksN/A

General Description


The LM4992 is a stereo audio power amplifier primarily designed for demanding applications in mobile phones and other portable communication device applications. It is capable of delivering 1 watt, per channel, of continuous average power to an 8 BTL load with less than 1% distortion (THD+N) from a 5VDC power supply.

Boomer audio power amplifiers were designed specifically to provide high quality output power with a minimal amount of external components. The LM4992 does not require output coupling capacitors or bootstrap capacitors, and therefore is ideally suited for mobile phone and other low voltage applications where minimal power consumption is a primary requirement.

The LM4992 features independent shutdown control for each channel and a low-power consumption shutdown mode, which is achieved by driving both shutdown pins with logic low. Additionally, the LM4992 features an internal thermal shutdown protection mechanism.

The LM4992 contains advanced pop & click circuitry which eliminates noise which would otherwise occur during turn-on and turn-off transitions.

The LM4992 is unity-gain stable and can be configured by external gain-setting resistors.

Reliability Metrics


Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)
LM4992SDCMOS7016561009540004270700104
LM4992SDXCMOS7016561009540004270700104

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 4-Jul-2009]