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SGM3133

Shengbang Microelectronics
Part Number SGM3133
Manufacturer Shengbang Microelectronics
Description 4-Channel Charge Pump White LED Driver
Published May 17, 2016
Detailed Description SGM3133 4-Channel Charge Pump White LED Driver with Low Dropout Current Source GENERAL DESCRIPTION The SGM3133 is a hig...
Datasheet PDF File SGM3133 PDF File

SGM3133
SGM3133

Overview
SGM3133 4-Channel Charge Pump White LED Driver with Low Dropout Current Source GENERAL DESCRIPTION The SGM3133 is a high efficiency and cost effective charge pump white LED driver.
It supports up to 4 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.
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 SGM3133 is available in Green TQFN-3×3-16L package and is specified over an ambient temperature range of -40℃ to +85℃.
FEATURES ● Input Voltage Range: 2.
7V to 5.
5V ● Drives up to 4 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 Hysteresis ● Available in Green TQFN-3×3-16L Package APPLICATIONS Mobile Phone, DSC, MP3 White LED Backlighting LCD Display Supply SG Micro Corp www.
sg-micro.
com REV.
A.
2 SGM3133 4-Channel Charge Pump White LED Driver with Low Dropout Current Source PACKAGE/ORDERING INFORMATION MODEL ORDER NUMBER SGM3133 SGM3133YTQ16G/TR PACKAGE DESCRIPTION TQFN-3×3-16L SPECIFIED TEMPERATURE RANGE -40℃ to +85℃ PACKAGE O...


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