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    Constant Current RGB LED Driver with I2C Control
    Constant Current RGB LED Driver with I2C Control

    The SGM31323 is a fully programmable, constant current RGB LED driver with a flexible control interface. The device is ideally powered from 1-cell Lithium-Ion/ Polymer, 3-cell NiCd/NiMH/Alkaline batteries, or systems with 3.3V or 5V supplies. It provides 3 independent programmable constant current sinks without requiring any external components.

    With an on-chip timing control unit, LED blink rate, fade-in and fade-out are user-adjustable resulting in unique color lighting patterns.

    Nine internal registers are programmed via the I2C control interface with a built-in decoder allowing individual control of the LED channels’ ON/OFF state and current level. A total of 192 current levels are available for each channel from 0.125mA to 24mA with a 0.125mA step.

    In shutdown mode, the quiescent current is reduced to less than 1μA.

    The device is available in Green UTDFN-1.5×1.5-8L package. It operates over an ambient temperature range of -40 to +85.



    • Ultra Low Dropout Regulated 3-CH Current Sinks

        30mV (TYP) at 10mA per Channel

    • Programmable LED Setting by I2C Compatible Interface

    • Individual Channel Control

        ON/OFF Interval Time Control

        Dimming Up/Down Time

        RGB LED Color Control

    • 192 Current-Level Setting

        0.125mA ~ 24mA, 0.125mA Step

    • No Noise, Non-Pulsating LED Current

    • Fast, Smooth Start-Up

    • Input Voltage Range: 2.5V to 5.5V

    • Less than 1μA Shutdown Current

    • -40 to +85 Operating Temperature Range

    • Available in Green UTDFN-1.5×1.5-8L Package


    RGB Indicator LEDs

    Flashing LEDs

    Mobile Phones

    Handheld Devices

    Digital Cameras

    Part NumberStatusPackagePinsPb-FreeTemp Range
    SGM31323YUDW8G/TRProductionUTDFN-1.5×1.5-8L8Y-40℃ to +85℃