National Semiconductor | High-performance Analog

 

 LM4879   

1.1 Watt Audio Power Amplifier
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Features
  • No output coupling capacitors, snubber networks or bootstrap capacitors required
  • Unity gain stable
  • Ultra low current shutdown mode
  • Fast turn on: 80ms (typ), 110ms (max) with 1.0µF capacitor
  • BTL output can drive capacitive loads up to 100pF
  • Advanced pop & click circuitry eliminates noises during turn-on and turn-off transitions
  • 2.2V - 5.0V operation
  • Available in space-saving µSMD, LLP, and MSOP packages
  • Description

    The LM4879 is an audio power amplifier primarily designed for demanding applications in mobile phones and other portable communication device applications. It is capable of delivering 1.1 watt 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 LM4879 does not require output coupling capacitors or bootstrap capacitors, and therefore is ideally suited for lower-power portable applications where minimal space and power consumption are primary requirements.

    The LM4879 features a low-power consumption global shutdown mode, which is achieved by driving the shutdown pin with logic low. Additionally, the LM4879 features an internal thermal shutdown protection mechanism.

    The LM4879 contains advanced pop & click circuitry which eliminates noises which would otherwise occur during turn-on and turn-off transitions.

    The LM4879 is unity-gain stable and can be configured by external gain-setting resistors.

    Key Specification
    PSRR: 5V, 3V @ 217Hz62dB (typ)
    Power Output at 5V & 1% THD+N 1.1W (typ)
    Power Output at 3V & 1% THD+N 350mW (typ)
    Shutdown Current0.1µA (typ)


    Applications

  • Mobile Phones
  • PDAs
  • Portable electronic devices



  •  

    ParametersValues
    Power@ 8Ohms, 1% THD 1.1 Watt
    Power@ 8Ohms, 10% THD 1.2 Watt
    THD 0.1 %
    PSRR 68 dB
    Channels 1 Channels
    THD Conditions f=1kHz, Po = 0.5Wrms
    PSRR Conditions Vripple = 0.2Vpp sine, CB=1.0uF. Input terminated with 10ohms to ground. F = 1kHz
    User Supply 5 Volt
    Shutdown Type Low
    Temperature Min -40 deg C
    Temperature Max 85 deg C

    Datasheets
    TitleSizeDateOther
    Language
    LM4879 1.1 Watt Audio Power Amplifier793
    Kbytes
    7-Oct-04   

    Part Number(s)
    (NSID)
    Top ViewAvailabilityCurrent Reported StockBudgetary PricingPack
    Size
    LM4879ITL/NOPB


    RoHS Status


    MICRO SMD
    Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    DIGI-KEYWorldwide0
    MOUSERWorldwide750
    RS COMPONENTSWorldwide250
    $0.55 each at 1K+ pcsreel
    of
    250
    LM4879ITP/NOPB


    RoHS Status


    MICRO SMD
    Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    DIGI-KEYWorldwide0
    RS COMPONENTSWorldwide250
    $0.55 each at 1K+ pcsreel
    of
    250
    LM4879MMX/NOPB

    LM4879MMX

    RoHS Status


    MINI SOIC
    Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    $0.55 each at 1K+ pcsreel
    of
    3500
    LM4879SD/NOPB

    LM4879SD

    RoHS Status


    LLP
    Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    RS COMPONENTSWorldwide5
    $0.55 each at 1K+ pcsreel
    of
    1000
    LM4879SDX/NOPB

    LM4879SDX

    RoHS Status


    LLP
    Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    $0.55 each at 1K+ pcsreel
    of
    4500

    Obsolete Versions
    Obsolete PartAlternate Part or SupplierSourceLast Time Buy Date
    LM4879IBLX
    LM4990ITLX
    NATIONAL SEMICONDUCTOR
    05 Mar 2008
    LM4879IBP
    LM4990ITL
    NATIONAL SEMICONDUCTOR
    05 Mar 2008
    LM4879IBPX
    NONE
    NATIONAL SEMICONDUCTOR
    24 Jul 2009
    LM4879MM
    LM4995SD
    NATIONAL SEMICONDUCTOR
    05 Mar 2008

    All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/en/packaging/leadfree.html.

    Moisture Sensitivity Level Data for LM4879.

    A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

    National's certificate of product compliance for LM4879 is located at RoHS Status.

    Part Number(s)
    (NSID)
    DescriptionAvailabilityCurrent Reported StockBudgetary PricingPack
    Size
    LM4879MMBD
    1.1 Watt Audio Power AmplifierFull production


     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    $60.00 each1

    The LM4879 is capable of delivering 1.1 watt of continuous average power to an 8Ω BTL load with less than 1% distortion (THD+N) from a 5VDC power supply.

    This LM4879MMBD is an evaluation board designed to ease the evaluation and effort during the development of a circuit using the LM4879MM. It is an easy to use stand-alone board that requires power and GND, an input signal and an output load.

    Features:

    • No output coupling capacitors, snubber networks or bootstrap capacitors required
    • Unity gain stable
    • Ultra low current shutdown mode
    • Fast turn on: 80ms (typ), 110ms (max) with 1.0µF capacitor
    • BTL output can drive capacitive loads up to 100pF
    • Advanced pop & click circuitry eliminates noises during turn-on and turn-off transitions
    • 2.2V - 5.0V operation

    Applications:

    • Mobile Phones
    • PDA's
    • Portable electronic device

    Contents:

    • Fully Assembled LM4879MM Evaluation Board
    • Instructions for where to locate and download the datasheet

    Please note: application information and board layout can be found in datasheet


    Part Number(s)
    (NSID)
    DescriptionAvailabilityCurrent Reported StockBudgetary PricingPack
    Size
    LM4879SDBD
    1.1 Watt Audio Power AmplifierFull production


     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    $170.00 each1

    The LM4879 is an audio power amplifier primarily designed for demanding applications in mobile phones and other portable communication device applications. It is capable of delivering 1.1 watt of continuous average power to an 8Ω BTL load with less than 1% distortion (THD+N) from a 5VDC power supply.

    This LM4879SDBD is an evaluation board designed to ease the evaluation and effort during the development of a circuit using the LM4879SD. It is an easy to use stand-alone board that requires power and GND, an input signal and an output load.

    Features:

    • No output coupling capacitors, snubber networks or bootstrap capacitors required
    • Unity gain stable
    • Ultra low current shutdown mode
    • Fast turn on: 80ms (typ), 110ms (max) with 1.0µF capacitor
    • BTL output can drive capacitive loads up to 100pF
    • Advanced pop & click circuitry eliminates noises during turn-on and turn-off transitions
    • 2.2V - 5.0V operation
    • Available in a non-pullback LLP package.

    Applications:

    • Mobile Phones
    • PDA's
    • Portable electronic devices

    Contents:

    • Fully Assembled LM4879SD Evaluation Board
    • Instructions for where to locate and download the datasheet

    Please note: application information and board layout can be found in datasheet




    National Semiconductor follows the provisions of the Product Stewardship Guide for Customers (CSP-9-111C1) and Banned Substances and Materials of Interest Specification (CSP-9-111S2) for regulatory environmental compliance. Details may be found at: www.national.com/en/packaging/greennopb.html. Lead free products are RoHS compliant.

    Lead Free product status is available through the search tool located here

    Part Number(s)
    (NSID)
    Weight
    (milligrams)
    TypePinsMSL RatingPeak ReflowRoHS
    Status
    CAD SymbolsModelsPackage
    Marking
    Format
    LM4879ITL/NOPB

    2.916
    MICRO SMD91260DetailDownloadN/A
    XVG
    I B3
    LM4879ITP/NOPB

    1.729
    1.747
    MICRO SMD81260DetailDownloadN/A
    XVG
    I D3
    LM4879MMX/NOPB

    LM4879MMX
    29.841
    30.002
    MINI SOIC101
    1
    260
    260
    DetailDownloadN/A
    ZXTT
    G79
    LM4879SD/NOPB

    LM4879SD
    40.107
    40.25
    LLP81
    1
    260
    260
    DetailDownloadN/A
    NS
    UZXYTT
    L4879SD
    LM4879SDX/NOPB

    LM4879SDX
    40.107
    40.25
    LLP81
    1
    260
    260
    DetailDownloadN/A
    NS
    UZXYTT
    L4879SD

    All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/en/packaging/leadfree.html.

    Moisture Sensitivity Level Data for LM4879.

    A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

    National's certificate of product compliance for LM4879 is located at RoHS Status.

    CAD Symbols and Models
    Download LM4879 CAD Symbols
     Models
    N/A


    Reliability Metrics
    Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)
    LM4879ITLCS065247473430552700011568301341
    LM4879ITPCS065247473430552700011568301341
    LM4879MMXCS065247473430552700011568301341
    LM4879SDCS065247473430552700011568301341
    LM4879SDXCS065247473430552700011568301341

    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.


    All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/en/packaging/leadfree.html.

    Moisture Sensitivity Level Data for LM4879.

    A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

    National's certificate of product compliance for LM4879 is located at RoHS Status.

    Obsolete Versions
    Obsolete PartAlternate Part or SupplierSourceLast Time Buy Date
    LM4879IBLX
    LM4990ITLX
    NATIONAL SEMICONDUCTOR
    05 Mar 2008
    LM4879IBP
    LM4990ITL
    NATIONAL SEMICONDUCTOR
    05 Mar 2008
    LM4879IBPX
    NONE
    NATIONAL SEMICONDUCTOR
    24 Jul 2009
    LM4879MM
    LM4995SD
    NATIONAL SEMICONDUCTOR
    05 Mar 2008

    [Information as of 9-Feb-2012]