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    SGM3142

    6-Channel Charge Pump White LED Driver with Low Dropout Current Source
     
    6-Channel Charge Pump White LED Driver with Low Dropout Current Source
    GENERAL DESCRIPTION

    The SGM3142 is a high efficiency and cost effective charge pump white LED driver. It supports up to 6 white LEDs and regulates a constant current for uniform intensity. The part maintains the high efficiency by utilizing a 1×/1.5× fractional charge pump and low dropout current sources. The small equivalent 1× mode open loop resistance and ultra-low dropout voltage of current source extend the operating time of 1× mode and optimize the efficiency of Li-ion battery in white LED applications.

    User can easily configure each LED current from 1.25mA to 20mA by a pulse dimming control. The dimming of white LEDs current can be achieved by applying a pulse signal to the EN/SET pin. There are totally 16 steps of current could be set by users. The operating voltage range is 2.7V to 5.5V. Internal soft-start circuitry effectively reduces the in-rush current while both start-up and mode transition.

    The SGM3142 is available in a Green TQFN-4×4-16L package and is specified over an ambient temperature range of -40 to +85.

    PIN CONFIGURATIONS

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    FEATURES
    • Input Voltage Range: 2.7V to 5.5V

    • Drives up to 6 LEDs at 20mA Each

    • 16-Step Brightness Control

    • High Efficiency by Fractional Conversion with 1× and 1.5× Modes

    • Automatic Charge Pump Mode Selection

    • Switching Frequency: 1MHz

    • 1% Typical LED Current Matching

    • Internal Soft-Start Limits Inrush Current

    • Low Input Noise and Low EMI

    • Over-Current and Over-Temperature Protection

    • Output Over-Voltage Protection

    • Under-Voltage Lockout with Hysteresis

    • Available in a Green TQFN-4×4-16L Package

    APPLICATIONS

    White LED Backlighting
    White Photo-Flash for DSCs
    Color (RGB) Lighting
    Programmable Current Source

    ORDERING INFORMATION
    Part NumberStatusPackagePinsPb-FreeTemp Range
    SGM3142YTQE16G/TRProductionTQFN-4×4-16L16Y-40℃ to +85℃







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