National Semiconductor | High-performance Analog

 

 LM4702   
Stereo High Fidelity 200 Volt Driver with Mute 		Click link to Download

Features
  • Very high voltage operation
  • Scalable output power
  • Minimum external components
  • External compensation
  • Thermal Shutdown and Mute

    • Description

    The LM4702 is a high fidelity audio power amplifier driver designed for demanding consumer and pro-audio applications. Amplifier output power may be scaled by changing the supply voltage and number of output devices. The LM4702 is capable of delivering in excess of 300 watts per channel single ended into an 8 ohm load in the presence of 10% high line headroom and 20% supply regulation.

    The LM4702 includes thermal shut down circuitry that activates when the die temperature exceeds 150°C. The LM4702's mute function, when activated, mutes the input drive signal and forces the amplifier output to a quiescent state.

    The LM4702 is available in 3 grades that span a wide range of applications and performance levels. The LM4702C is targeted at high volume applications. The LM4702B includes a higher voltage rating along with the tighter specifications. The LM4702A* (in development) is the premium part with the highest voltage rating, fully specified with limits over voltage and temperature, and is offered in a military 883 compliant TO-3 package.

    * Tentative Max Operating voltage for the LM4702A (in development)

    Key Specification
    Wide operating voltage range 
    LM4702A* (in development)±20V to ±100V
    LM4702B±20V to ±100V
    LM4702C±20V to ±75V
    Equivalent Noise3µV
    PSRR110dB (typ)
    THD+N (A and B Grades)0.0003%


    Applications

  • AV receivers
  • Audiophile power amps
  • Pro Audio
  • High voltage industrial applications




    • Typical Application
    click for larger image


    		Connection Diagram
    click for larger image



    Typical Performance
    click for larger image


     

    ParametersValues
    THD 0.005, 0.0003 %
    PSRR 110 dB
    Single/Dual/Quad Dual
    THD Conditions No load, Av=30dB, Vout=20Vrms, f=1kHz, No load, Av=30dB, Vout=14Vrms, f=1kHz
    PSRR Conditions Rs=1k, f=100Hz, 1Vrms, input referred
    User Supply 100, 75 Volt
    Shut down No
    Supply Range -100V - +100V, -75 - +75V
    Output Current 5.5 mA
    Offset Voltage, typ 10 mV
    Slew Rate 17, 15 Volts/usec
    Mono/Stereo Stereo
    Temperature Min -20 deg C
    Temperature Max 75 deg C
    Channels 2 Channels
    Automotive Yes

    Datasheets
    TitleSizeDateOther
    Language
    LM4702 Stereo High Fidelity 200 Volt Driver with Mute891
    Kbytes    		20-Sep-06   


    Application Notes
    TitleSizeDateOther
    Language
    AN-1645: Application Note 1645 LM4702 Driving a MOSFET Output Stage655
    Kbytes    		24-May-07 中文
    AN-1490: Application Note 1490 LM4702 Power Amplifier1033
    Kbytes    		26-May-06 中文

    Part Number(s)
    (NSID)    		Top ViewAvailabilityCurrent Reported StockBudgetary PricingPack
    Size
    LM4702BTA/NOPB


    RoHS Status

    TO-220    		Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    ARROWWorldwide80
    DIGI-KEYWorldwide79
    FARNELLEurope and Asia50
    MOUSERWorldwide58
    NEWARKAmericas28
    TAYLORAmericas80
    		$7.30 each at 100+ pcsrail
    of
    20
    LM4702CTA/NOPB

    LM4702CTA

    RoHS Status

    TO-220    		Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    ARROWWorldwide24
    DIGI-KEYWorldwide146
    FARNELLEurope and Asia173
    MOUSERWorldwide87
    NEWARKAmericas91
    RS COMPONENTSWorldwide13
    TAYLORAmericas24
    		$3.61 each at 1K+ pcsrail
    of
    20

    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 LM4702.

    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 LM4702 is located at RoHS Status.

    Part Number(s)
    (NSID)    		Weight
    (milligrams)    		TypePinsMSL RatingPeak ReflowRoHS
    Status    		CAD SymbolsModelsPackage
    Marking
    Format
    LM4702BTA/NOPB

    		5193.55
    		TO-220151NADetailDownloadN/A
    		NSUZXYTTE#
    LM4702BTA
    LM4702CTA/NOPB

    LM4702CTA
    		5193.55
    5199.18
    		TO-220151
    1    		NA
    NA    		DetailDownloadN/A
    		NSUZXYTTE#
    LM4702CTA

    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 LM4702.

    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 LM4702 is located at RoHS Status.

    CAD Symbols and Models
    Download LM4702 CAD Symbols
    		 Models
    N/A


    Reliability Metrics
    Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)
    LM4702BTAVIP III H/HU202366007025546199351615
    LM4702CTAVIP III H/HU202366007025546199351615

    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 LM4702.

    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 LM4702 is located at RoHS Status.

    [Information as of 3-Feb-2012]
    Copyright © 2011 National Semiconductor Corporation