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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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