National Semiconductor | High-performance Analog

 

 LM48556   

Fully Differential, Mono, Ceramic Speaker Driver
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Features

  • Fully differential amplifier
  • Externally configurable gain
  • Integrated charge pump
  • Low power shutdown mode
  • Soft start function
  • Description

    The LM48556 is a single supply, mono, ceramic speaker driver with an integrated charge-pump, designed for portable devices, such as cell phones, where board space is at a premium. The LM48556 charge pump allows the device to deliver 17.5VPP (typ) from a single 4.5V supply. Additionally, the charge pump features a soft start function that minimizes transient current during power-up.

    The LM48556 features high power supply rejection ratio (PSRR) of 80dB at 217Hz, allowing the device to operate in noisy environments without additional power supply conditioning. Flexible power supply requirements allow operation from 2.7V to 5.0V. Additionally, the LM48556 features a differential input function and an externally configurable gain. A low power shutdown mode reduces supply current consumption to 0.1μA.

    Superior click and pop suppression eliminates audible transients on power-up/down and during shutdown. The LM48556 is available in an ultra-small 12-bump micro SMD package (2mm x 1.5mm).

    Key Specification
    Output Voltage Swing  
      VDD = 3.6V, 1kHz 14.2VPP (typ)
      VDD = 4.5V, 1kHz 17.5VPP (typ)
    Power Supply Rejection Ratio   f = 217Hz, VDD = 3.6V 80dB (typ)
    IDD at VDD = 3.6V 4.8mA (typ)
    Wake-Up Time 0.5ms (typ)


    Applications

  • Mobile phones
  • PDA's
  • Digital cameras



  • Typical Application
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    Connection Diagram
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    Typical Performance
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    ParametersValues
    Load Conditions Rl=15ohm+1uF
    Supply Min 2.7 Volt
    Supply Max 5.0 Volt
    THD Conditions f=1kHz, Rl=15ohm+1uF
    Shutdown Type Low

    Datasheets
    TitleSizeDateOther
    Language
    LM48556 Fully Differential, Mono, Ceramic Speaker Driver1021
    Kbytes
    10-Dec-08   

    Part Number(s)
    (NSID)
    Top ViewAvailabilityCurrent Reported StockBudgetary PricingPack
    Size
    LM48556TL/NOPB


    RoHS Status


    MICRO SMD
    Full production
    Lead Time: 12 weeks

    Samples
    DistributorRegionQty
    DIGI-KEYWorldwide1269
    MOUSERWorldwide490
    $1.10 each at 1K+ pcsreel
    of
    250
    LM48556TLX/NOPB


    RoHS Status


    MICRO SMD
    Full production
    Lead Time: 12 weeks

     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    KEIKONGAsia Pacific3000
    $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 LM48556.

    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 LM48556 is located at RoHS Status.

    Part Number(s)
    (NSID)
    DescriptionAvailabilityCurrent Reported StockBudgetary PricingPack
    Size
    LM48556TLBD
    evaluation boardFull production


     
    DistributorRegionQty
    MOUSERWorldwide1
    $150.00 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
    LM48556TL/NOPB

    3.657
    MICRO SMD121260DetailDownloadN/A
    XYTT
    I GK4
    LM48556TLX/NOPB

    3.657
    MICRO SMD121260DetailDownloadN/A
    XYTT
    I GK4

    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 LM48556.

    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 LM48556 is located at RoHS Status.

    CAD Symbols and Models
    Download LM48556 CAD Symbols
     Models
    N/A


    Audio Solutions for Portable Devices
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    Audio Solutions for Portable Devices
    Date: 2009-03-02
    Length: 00:50:38
    [Information as of 9-Feb-2012]