National Semiconductor | High-performance Analog

 

 LP3952   
6-Channel Color LED Driver with Audio Synchronization from the PowerWise® Family		 Click link to Download

Features

  • Constant current and PWM controlled color LED drivers
  • Maximum current 40mA / output in constant current mode, supports also switch mode control with 50 mA maximum current / output
  • Complete audio synchronization for color/RGB LEDs with amplitude, frequency and speed optimization
  • Command based lighting pattern generator for RGB LEDs
  • Programmable ON/OFF blinking sequences for RGB1 outputs
  • High efficiency Boost DC-DC converter with programmable VOUTand fSW
  • I 2C compatible interface
  • Possibility for external PWM dimming control
  • Small package – 36-bump micro SMDxt, 3.0 x 3.0 x 0.65 mm

    • Description

    LP3952 is a color LED driver for battery powered handheld devices. It drives any color LEDs including RGB LEDs, indicator LEDs and keypad backlight LEDs. The boost DC-DC converter drives high current loads with high efficiency. The stand-alone command based RGB controller is feature rich and easy to configure. Different lighting patterns and blinking sequences can be programmed to driver registers. Built-in audio synchronization feature allows user to synchronize the color LEDs to audio signal. LED lighting can be controlled either by audio signal amplitude or frequency. There are many controls available for audio synchronization to get desired lighting effect, including gain, speed, and different filter settings. The flexible I 2C interface allows easy control of LP3952. LED outputs can be also controlled with external PWM signal. Small micro SMDxt package together with minimum number of external components is a best fit for handheld devices.


    Applications

  • Cellular Phones
  • PDAs, MP3 players




    • Typical Application
    click for larger image


    		Block Diagram
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    Typical Performance
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    ParametersValues
    Regulated LEDs 6
    LED Configuration Parallel
    Current Matching 5%
    Boost Type Inductive
    Switching Frequency 2000 kHz
    Switching Type PWM
    Total LED Current 300 mA
    Efficiency (peak) 90 %
    PowerWise Technology Audio Adaptive RGB LED Driver
    Boost Voltage Regulated
    Input Min Voltage 3 Volt
    Input Max Voltage 7.2 Volt
    OutputMax Voltage 5.3 Volt
    PWM BrightCtrl Yes
    Analog-V BrightCtrl Yes
    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
    LP3952 6-Channel Color LED Driver with Audio Synchronization1951
    Kbytes    		5-Jul-07   

    Part Number(s)
    (NSID)    		Top ViewAvailabilityCurrent Reported StockBudgetary PricingPack
    Size
    LP3952RL/NOPB


    RoHS Status

    MICRO SMDXT    		Full production
    Lead Time: 6 weeks

    Samples
    DistributorRegionQty
    DIGI-KEYWorldwide935
    FARNELLEurope and Asia499
    MOUSERWorldwide500
    NEWARKAmericas499
    		$1.10 each at 1K+ pcsreel
    of
    250
    LP3952RLX/NOPB


    RoHS Status

    MICRO SMDXT    		Full production
    Lead Time: 6 weeks

     
    DistributorRegionQty
    DIGI-KEYWorldwide0
    		$1.10 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 LP3952.

    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 LP3952 is located at RoHS Status.

    Part Number(s)
    (NSID)    		Weight
    (milligrams)    		TypePinsMSL RatingPeak ReflowRoHS
    Status    		CAD SymbolsModelsPackage
    Marking
    Format
    LP3952RL/NOPB

    		10.625
    		MICRO SMDXT361260DetailDownloadN/A
    		XYTT
    I D62B
    LP3952RLX/NOPB

    		10.625
    		MICRO SMDXT361260DetailDownloadN/A
    		XYTT
    I D62B

    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 LP3952.

    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 LP3952 is located at RoHS Status.

    CAD Symbols and Models
    Download LP3952 CAD Symbols
    		 Models
    N/A


    Reliability Metrics
    Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)
    LP3952RLCMOS70213010015840003449464325
    LP3952RLXCMOS70213010015840003449464325

    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 LP3952.

    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 LP3952 is located at RoHS Status.

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