SGM3146 Datasheet PDF (8-Channel Charge Pump White LED Driver) | Download Shengbang Microelectronics SGM3146

SGM3146 - 8-Channel Charge Pump White LED Driver

Datasheet Summary

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.

Datasheet Details

Part number	SGM3146
Manufacturer	Shengbang Microelectronics
File Size	281.23 KB
Description	8-Channel Charge Pump White LED Driver
Datasheet	SGM3146 Datasheet
Additional preview pages of the 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.

Published: May 17, 2016 |