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SGM3146 - 8-Channel Charge Pump White LED Driver

Description

The SGM3146 is a high performance white LED driver.

It integrates current sources and automatic mode selection charge pump.

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 8 LEDs at 27mA Each.
  • One Single Wire Interface.
  • 16-Step Brightness Control.
  • High Efficiency by Fractional Conversion with 1× and 1.5× Modes.
  • Switching Frequency: 0.93MHz.
  • Regulated Output Current with ±4.8% Matching.
  • Internal Soft-Start Limits Inrush Current.
  • Low Input Ripple and Low EMI.
  • Over-Current and Over-Temperature Protection.
  • Under-Voltage Lockout with Hysteresis.
  • Available in Gre.

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Datasheet Details

Part number SGM3146
Manufacturer SG Micro
File Size 281.23 KB
Description 8-Channel Charge Pump White LED Driver
Datasheet download datasheet SGM3146 Datasheet

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Full PDF Text Transcription

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SGM3146 8-Channel Charge Pump White LED Driver with Low Dropout Current Source GENERAL DESCRIPTION The SGM3146 is a high performance white LED driver. It integrates current sources and automatic mode selection charge pump. 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. The SGM3146 supports up to 8 white LEDs and regulates a constant current which the initial value can be set by an internal resistor. The part implements a 4-bit DAC for brightness control. Users can easily configure the LED current from 1.
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