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SGM3131 - 120mA 4-Channel Charge Pump White LED Driver

General Description

The SGM3131 is a current-regulated white LED driver with integrated low dropout current sources and a high efficiency charge pump.

The charge pump has automatically selectable 1×/1.5× fractional operation modes.

Key Features

  • Input Voltage Range: 2.7V to 5.5V.
  • Support up to 4 LEDs at 30mA Each.
  • 16-Step LED Brightness Control Through One-Wire Interface.
  • 1× and 1.5× Charge Pump for High Conversion Efficiency.
  • Switching Frequency: 1MHz.
  • 1% Regulated LED Current Matching.
  • Built-in Soft-Start for Reducing Inrush Current.
  • Low Input Ripple and Low EMI.
  • Protection Features  Over-Current Protection  Under-Voltage Lockout  Thermal Shutdown.
  • Operating Temperature Range: -40℃.

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Datasheet Details

Part number SGM3131
Manufacturer SG Micro
File Size 633.51 KB
Description 120mA 4-Channel Charge Pump White LED Driver
Datasheet download datasheet SGM3131 Datasheet

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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SGM3131 120mA 4-Channel Charge Pump White LED Driver with Low Dropout Current Source GENERAL DESCRIPTION The SGM3131 is a current-regulated white LED driver with integrated low dropout current sources and a high efficiency charge pump. The charge pump has automatically selectable 1×/1.5× fractional operation modes. The SGM3131 is well suited for white LED applications powered by a Li-Ion battery due to small equivalent open-loop resistance in 1× mode. The supply voltage operates from 2.7V to 5.5V. The SGM3131 supports up to 4 LEDs for total maximum 120mA current. The ISET reference current is set through an external resistor on the ISET pin. The SGM3131 contains a 4-bit digital-to-analog converter for 16-step LED current control. The LED current can be set between 0.