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SGM3146

Shengbang Microelectronics
Part Number SGM3146
Manufacturer Shengbang Microelectronics
Description 8-Channel Charge Pump White LED Driver
Published May 17, 2016
Detailed Description SGM3146 8-Channel Charge Pump White LED Driver with Low Dropout Current Source GENERAL DESCRIPTION The SGM3146 is a hig...
Datasheet PDF File SGM3146 PDF File

SGM3146
SGM3146

Overview
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.
65mA to 27mA by a serial pulse.
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 SGM3146 is available in Green TQFN-3×3-20L package and is rated over the -40℃ to +85℃ temperature range.
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 Green TQFN-3×3-20L Package APPLICATIONS Mobile Phone, DSC, MP3 White LED Backlighting LCD Display Supply SG Micro Corp www.
sg-micro.
com REV.
A.
1 SGM3146 8-Channel Charge Pump White LED Driver with Low Dropout Current Source PACKAGE/ORDERING INFORMATION MODEL SGM3146 ORDER NUMBER SGM3146YTQ...


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