National Semiconductor | High-performance Analog

 

 LM48413   

Ultra Low EMI, Filterless, 1.2W Stereo Class D Audio Power Amplifier with E2S and National 3D Enhancement
Click link to Download

Features

  • E 2S system reduces EMI preserving audio quality and efficiency
  • Output Short Circuit Protection
  • Stereo Class D operation
  • No output filter required
  • National 3D Enhancement
  • Minimum external components
  • Click and Pop suppression
  • Micro-power shutdown
  • Available in space-saving approximately 2mm x 2.2mm micro SMD package
  • Description

    The LM48413 is a single supply, high efficiency, 1.2W/channel, filterless switching audio amplifier. The LM48413 features National’s Enhanced Emissions Suppression (E 2S) system - a unique patented ultra low EMI, spread spectrum, PWM architecture. It significantly reduces RF emission while preserving audio quality and efficiency. The E 2S system improves battery life, reduces external component count, board area consumption, system cost and product design cycle time. The LM48413TL is available in a micro-SMD package, further saving space.

    The LM48413 is designed to meet the demands of mobile phones and other portable communication devices. Operating from a single 5V supply, the device is capable of delivering 1.2W/channel of continuous output power to a 8Ω load with less than 1% THD+N. Flexible power supply requirements allow operation from 2.4V to 5.5V. The wide band spread spectrum architecture of the LM48413 reduces EMI-radiated emissions due to the modulator frequency.

    The LM48413 features high efficiency compared with conventional Class AB amplifiers. The E 2S system includes an advanced, patent-pending edge rate control (ERC) architecture that further reduce emissions by minimizing the high frequency components of the device output, while maintaining its high quality audio reproduction and high efficiency (η = 85% at VDD = 3.6V, PO = 500mW). The LM48413 also includes National’s 3D audio enhancement that improves stereo sound quality. In devices where the left and right speakers are in close proximity, 3D enhancement affects channel specialization, widening the perceived soundstage.

    Output short circuit protection prevents the device from being damaged during fault conditions. Superior click and pop suppression eliminates audible transients on power up/down and during shutdown. Shutdown control also provided to maximizes power savings.

    Key Specification
    Quiescent Power Supply Current   at 3.6V supply 4mA (typ)
    Power Output at VDD = 5V,   RL = 8Ω, THD 1% 1.2W (typ)
    Shutdown current 0.03μA (typ)
    Efficiency at 3.6V, 100mW into 8Ω 80% (typ)
    Efficiency at 3.6V, 500mW into 8Ω 85% (typ)
    Efficiency at 5V, 1W into 8Ω 86% (typ)


    Applications

  • Mobile phones
  • PDAs
  • Laptops



  • Typical Application
    click for larger image


    Connection Diagram
    click for larger image



    Typical Performance
    click for larger image


     

    ParametersValues
    Power@ 8Ohms, 1% THD 1.2 Watt
    Power@ 8Ohms, 10% THD 1.5 Watt
    THD .03 %
    PSRR 91 dB
    SNR 88 dB
    Channels 2 Channels
    THD Conditions Po=500mW/ch, f=1kHz, 22 kHz BW
    PSRR Conditions 200mVpp, f=217Hz, Cin=1uF inputs AC GND
    SNR Conditions Vdd=5V, Po=1W
    User Supply 3.6 Volt
    Shut down Yes
    Mono/Stereo Stereo
    Shutdown Type Low
    Supply Range +2.4 - +5.5 V
    Temperature Min -40 deg C
    Temperature Max 85 deg C

    Part Number(s)
    (NSID)
    Top ViewAvailabilityCurrent Reported StockBudgetary PricingPack
    Size
    LM48413TL/NOPB


    RoHS Status


    MICRO SMD
    Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    DIGI-KEYWorldwide975
    MOUSERWorldwide500
    $1.10 each at 1K+ pcsreel
    of
    250
    LM48413TLX/NOPB


    RoHS Status


    MICRO SMD
    Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    $1.10 each at 1K+ pcsreel
    of
    3000

    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 LM48413.

    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 LM48413 is located at RoHS Status.

    Part Number(s)
    (NSID)
    DescriptionAvailabilityCurrent Reported StockBudgetary PricingPack
    Size
    LM48413TLBD
    evaluation boardFull production


     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    MOUSERWorldwide1
    $145.00 each1



    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
    LM48413TL/NOPB

    5.605
    MICRO SMD181260DetailDownloadN/A
    XYTT
    I GL2
    LM48413TLX/NOPB

    5.605
    MICRO SMD181260DetailDownloadN/A
    XYTT
    I GL2

    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 LM48413.

    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 LM48413 is located at RoHS Status.

    CAD Symbols and Models
    Download LM48413 CAD Symbols
     Models
    N/A


    [Information as of 9-Feb-2012]