National Semiconductor | High-performance Analog

 

 LP55281   

Quad RGB Driver from the PowerWise® Family
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Features

  • Audio synchronization for a single fun light LED
  • 4 PWM controlled RGB LED drivers
  • High efficiency Boost DC-DC converter
  • SPI/I 2C compatible interface
  • 2 addresses in I 2C compatible interface
  • LED connectivity test through the serial interface
  • Small 36-bump Micro SMD (3 mm x 3 mm x 0.6 mm) or 36-bump Micro SMDxt package (3 mm x 3 mm x 0.65 mm)
  • Description

    LP55281 is a quad RGB LED driver for handheld devices. It can drive 4 RGB LED sets and a single fun light LED. The boost DC-DC converter drives high current loads with high efficiency. The RGB driver can drive individual color LEDs or RGB LEDs powered from boost output or external supply. Built-in audio synchronization feature allows user to synchronize the fun light LED to audio inputs. The flexible SPI/I 2C interface allows easy control of LP55281. Small Micro SMD or Micro SMDxt package together with minimum number of external components is a best fit for handheld devices. LP55281 has also a LED test feature, which can be used for example in production for checking the LED connections.


    Applications

  • Cellular Phones
  • PDAs, MP3 players



  • Typical Application
    *click for larger image


    Block Diagram
    *click for larger image


     

    ParametersValues
    Regulated LEDs 12
    LED Configuration Parallel
    Current Matching 5%
    Boost Type Inductive
    Switching Frequency 2000 kHz
    Switching Type PWM
    Total LED Current 400 mA
    Efficiency (peak) 88 %
    PowerWise Technology Audio Adaptive RGB LED Driver
    Boost Voltage Regulated
    Supply Current 1 mA
    Input Min Voltage 3 Volt
    Input Max Voltage 5.5 Volt
    OutputMax Voltage 5.3 Volt
    PWM BrightCtrl Yes
    Analog-V BrightCtrl No
    Ambient Light Compensation No
    RGB-LED Yes
    Temperature Min -30 deg C
    Temperature Max 85 deg C
    RegType Lighting Management Unit
    PowerWise Yes

    Datasheets
    TitleSizeDateOther
    Language
    LP55281 Quad RGB Driver1482
    Kbytes
    20-Jun-07   


    Application Notes
    TitleSizeDateOther
    Language
    AN-1631: Application Note 1631 LP55281 Evaluation Kit5177
    Kbytes
    13-Jun-07 中文


    Other Technical Documents
    TitleTypeDate
    Color-Management LED Drivers Have a Bright FuturePower Designer 2007-06-20

    Part Number(s)
    (NSID)
    Top ViewAvailabilityCurrent Reported StockBudgetary PricingPack
    Size
    LP55281RL/NOPB


    RoHS Status


    MICRO SMDXT
    Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    DIGI-KEYWorldwide329
    FARNELLEurope and Asia245
    MOUSERWorldwide500
    NEWARKAmericas245
    $1.05 each at 1K+ pcsreel
    of
    250
    LP55281RLX/NOPB


    RoHS Status


    MICRO SMDXT
    Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    $1.05 each at 1K+ pcsreel
    of
    1000
    LP55281TL/NOPB


    RoHS Status


    MICRO SMD
    Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    DIGI-KEYWorldwide0
    FARNELLEurope and Asia220
    MOUSERWorldwide500
    NEWARKAmericas220
    RS COMPONENTSWorldwide120
    $1.05 each at 1K+ pcsreel
    of
    250
    LP55281TLX/NOPB


    RoHS Status


    MICRO SMD
    Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    $1.05 each at 1K+ pcsreel
    of
    1000

    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 LP55281.

    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 LP55281 is located at RoHS Status.

    Part Number(s)
    (NSID)
    DescriptionAvailabilityCurrent Reported StockBudgetary PricingPack
    Size
    LP55281RLEV
    Quad RGB Driver from the PowerWise® FamilyFull production


     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    MOUSERWorldwide1
    $100.00 each1

    Description:

    The LP55281 is a quad RGB LED driver for handheld devices. It can drive 4 RGB LED sets and a single fun light LED. The boost DC-DC converter drives high current loads with high efficiency. The RGB driver can drive individual color LEDs or RGB LEDs powered from boost output or external supply. Built-in audio synchronization feature allows easy control of LP55281. Small micro SMD package or micro SMDxt package together with minimum number of external components is a best fit for handheld devices. LP55281 has also a LED test feature, which can be used for example in production for checking the LED connections.

    Evaluation Kit Overview:

    The LP55281 Evaluation Kit is based on a modular system, where the actual evaluation board is plugged on top of the PC interface board. The interface operates through the USB port. The kit supports complete functional evaluation of the circuit.

    Contents:

    • LP55281 evaluation board
    • USB interface board
    • USB interface cable
    • Audio cable and 3.5mm branch plug
    • CD-ROM including:
      Evaluation software for PC
    • LP55281 datasheet
    • MicroSMD package application note AN-1112
    • MicroSMDxt package application note AN-1412
    • PCB design application note AN-1149
    • Evaluation kit document



    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
    LP55281RL/NOPB

    10.625
    MICRO SMDXT361260DetailDownloadN/A
    XYTT
    I D61B
    LP55281RLX/NOPB

    10.625
    MICRO SMDXT361260DetailDownloadN/A
    XYTT
    I D61B
    LP55281TL/NOPB

    11.546
    MICRO SMD361260DetailDownloadN/A
    XYTT
    I D56B
    LP55281TLX/NOPB

    11.546
    MICRO SMD361260DetailDownloadN/A
    XYTT
    I D56B

    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 LP55281.

    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 LP55281 is located at RoHS Status.

    CAD Symbols and Models
    Download LP55281 CAD Symbols
     Models
    N/A


    Reliability Metrics
    Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)
    LP55281RLCMOS70213010015840003449464325
    LP55281RLXCMOS70213010015840003449464325
    LP55281TLCMOS70213010015840003449464325
    LP55281TLXCMOS70213010015840003449464325

    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 LP55281.

    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 LP55281 is located at RoHS Status.

    [Information as of 9-Feb-2012]