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SGM3142 - 6-Channel Charge Pump White LED Driver

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.

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 Hy.

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Datasheet Details

Part number SGM3142
Manufacturer SG Micro
File Size 333.85 KB
Description 6-Channel Charge Pump White LED Driver
Datasheet download datasheet SGM3142 Datasheet

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Full PDF Text Transcription

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SGM3142 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.
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