National Semiconductor | High-performance Analog

 

 LM4871   
3W Audio Power Amplifier with Shutdown Mode 		Click link to Download

Features
  • No output coupling capacitors, bootstrap capacitors, or snubber circuits required
  • Unity-gain stable
  • LLP, MSOP, SO, or DIP packaging
  • External gain configuration capability
  • Pin compatible with the LM4861

    • Description

    The LM4871 is a mono bridged audio power amplifier capable of delivering 3W of continuous average power into a 3 load with less than 10% THD when powered by a 5V power supply . To conserve power in portable applications, the LM4871's micropower shutdown mode (IQ = 0.6µA, typ) is activated when VDD is applied to the SHUTDOWN pin.

    Boomer audio power amplifiers are designed specifically to provide high power, high fidelity audio output. They require few external components and operate on low supply voltages from 2.0V to 5.5V. Since the LM4871 does not require output coupling capacitors, bootstrap capacitors, or snubber networks, it is ideally suited for low-power portable systems that require minimum volume and weight.

    Additional LM4871 features include thermal shutdown protection, unity-gain stability, and external gain set.

    Key Specification

    PO at 10% THD+N, 1kHz

    		  

    LM4871LD: 3 , 4 loads

    3W (typ), 2.5W (typ)

    All other LM4871 packages: 8 load

    1.5W (typ)

    Shutdown current

    0.6µA (typ)

    Supply voltage range

    2.0V to 5.5V

    THD at 1kHz at 1W continuous average output power into 8

    0.5% (max)


    Applications

  • Portable computers
  • Desktop computers
  • Low voltage audio systems

    • Also Recommended
    LM4995▲MicroSMD Package



    Typical Application
    click for larger image


    		Connection Diagram
    click for larger image



    Typical Performance
    click for larger image


    Parameters / ValuesLM4871 LM4995
    Power@ 4Ohms, 1% THD2.2 Watt
    Power@ 8Ohms, 1% THD1.2 Watt 1.3 Watt
    Power@ 4Ohms, 10% THD2.5 Watt
    Power@ 8Ohms, 10% THD1.5 Watt
    THD0.13, 0.25 % 0.1 %
    PSRR60 dB 73 dB
    SNR98 dB
    Channels1 Channels 1 Channels
    Supply Range+2.0 - +5.5 V +2.4 - +5.5 V
    THD ConditionsPo=1W @ Vs=5V, R=8 ohms, Po=1.6W @ Vs=5V, R=4 ohms Po = 500mWRMS; f = 1kHz
    User Supply5 Volt 5 Volt
    Shutdown TypeHigh Low
    Temperature Min-40 deg C -40 deg C
    Temperature Max85 deg C 85 deg C

    Datasheets
    TitleSizeDateOther
    Language
    LM4871 3W Audio Power Amplifier with Shutdown Mode472
    Kbytes    		20-Oct-04日本語  

    Part Number(s)
    (NSID)    		Top ViewAvailabilityCurrent Reported StockBudgetary PricingPack
    Size
    LM4871LD/NOPB

    LM4871LD

    RoHS Status

    LLP    		Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    AVNET-EMWorldwide1000
    DIGI-KEYWorldwide1829
    MOUSERWorldwide1000
    		$0.46 each at 1K+ pcsreel
    of
    1000
    LM4871LDX/NOPB

    LM4871LDX

    RoHS Status

    LLP    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    		$0.46 each at 1K+ pcsreel
    of
    4500
    LM4871M/NOPB

    LM4871M

    RoHS Status

    SOIC NARROW    		Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    ARROWWorldwide1491
    AVNET-EMWorldwide260
    DIGI-KEYWorldwide1589
    FARNELLEurope and Asia960
    MOUSERWorldwide480
    NEWARKAmericas168
    RS COMPONENTSWorldwide148
    TAYLORAmericas8141
    		$0.41 each at 1K+ pcsrail
    of
    95
    LM4871MM/NOPB

    LM4871MM

    RoHS Status

    MINI SOIC    		Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    ARROWWorldwide1000
    DIGI-KEYWorldwide1510
    FARNELLEurope and Asia1127
    MOUSERWorldwide950
    NEWARKAmericas438
    TAYLORAmericas1000
    TECHMOSAAsia Pacific9000
    		$0.41 each at 1K+ pcsreel
    of
    1000
    LM4871MMX/NOPB

    LM4871MMX

    RoHS Status

    MINI SOIC    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    AVNET-EMWorldwide3500
    BRITESTONESouth Korea10500
    DIGI-KEYWorldwide0
    		$0.41 each at 1K+ pcsreel
    of
    3500
    LM4871MX/NOPB

    LM4871MX

    RoHS Status

    SOIC NARROW    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    ARROWWorldwide2500
    AVNET-EMWorldwide17500
    BRITESTONESouth Korea87
    DIGI-KEYWorldwide0
    FARNELLEurope and Asia2315
    MOUSERWorldwide2373
    NEWARKAmericas2315
    RSL MICROAsia Pacific12500
    TAYLORAmericas14110
    		$0.41 each at 1K+ pcsreel
    of
    2500

    Obsolete Versions
    Obsolete PartAlternate Part or SupplierSourceLast Time Buy Date
    LM4871N
    		NONE
    		NATIONAL SEMICONDUCTOR
    		07 Jun 2005

    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 LM4871.

    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 LM4871 is located at RoHS Status.

    Part Number(s)
    (NSID)    		Weight
    (milligrams)    		TypePinsMSL RatingPeak ReflowRoHS
    Status    		CAD SymbolsModelsPackage
    Marking
    Format
    LM4871LD/NOPB

    LM4871LD
    		37.272
    37.401
    		LLP83
    1    		260
    235    		DetailDownloadN/A
    		NS
    UZXYTT
    L4871
    LM4871LDX/NOPB

    LM4871LDX
    		37.272
    37.401
    		LLP83
    1    		260
    235    		DetailDownloadN/A
    		NS
    UZXYTT
    L4871
    LM4871M/NOPB

    LM4871M
    		69.761
    70.001
    		SOIC NARROW81
    1    		260
    235    		DetailDownloadN/A
    		NSZXTT
    4871
    LM4871MM/NOPB

    LM4871MM
    		29.851
    30.002
    		MINI SOIC81
    1    		260
    260    		DetailDownloadN/A
    		ZXTT
    G71
    LM4871MMX/NOPB

    LM4871MMX
    		29.851
    30.002
    		MINI SOIC81
    1    		260
    260    		DetailDownloadN/A
    		ZXTT
    G71
    LM4871MX/NOPB

    LM4871MX
    		69.761
    70.001
    		SOIC NARROW81
    1    		260
    235    		DetailDownloadN/A
    		NSZXTT
    4871

    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 LM4871.

    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 LM4871 is located at RoHS Status.

    CAD Symbols and Models
    Download LM4871 CAD Symbols
    		 Models
    N/A


    Reliability Metrics
    Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)
    LM4871LDCS065247473430552700011568301341
    LM4871LDXCS065247473430552700011568301341
    LM4871MCS065247473430552700011568301341
    LM4871MMCS065247473430552700011568301341
    LM4871MMXCS065247473430552700011568301341
    LM4871MXCS065247473430552700011568301341

    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 LM4871.

    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 LM4871 is located at RoHS Status.

    Obsolete Versions
    Obsolete PartAlternate Part or SupplierSourceLast Time Buy Date
    LM4871N
    		NONE
    		NATIONAL SEMICONDUCTOR
    		07 Jun 2005

    [Information as of 9-Feb-2012]
    Copyright © 2011 National Semiconductor Corporation