Datasheet > SGM3142

SGM3142

更新时间： 2024-10-03 01:14:39

品牌	Logo	应用领域
圣邦微 - SGMICRO		/
页数	文件大小	规格书
14页	1355K
描述
6-Channel Charge Pump White LED Driver with Low Dropout Current Source

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SGM3142 数据手册

SGM3142

6-Channel Charge Pump White LED

Driver with Low Dropout Current Source

GENERAL DESCRIPTION

FEATURES

The SGM3142 is a high efficiency and cost effective

charge pump white LED driver. It supports up to 6 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.

●

Input Voltage Range: 2.7V to 5.5V

Drives up to 6 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

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.

Under-Voltage Lockout with Hysteresis

Available in Green TQFN-4×4-16L Package

APPLICATIONS

White LED Backlighting

White Photo-Flash for DSCs

Color (RGB) Lighting

The SGM3142 is available in Green TQFN-4×4-16L

package and is specified over an ambient temperature

range of -40℃ to +85℃.

Programmable Current Source

REV. A. 2

SG Micro Corp

www.sg-micro.com

12 3 4 5 6 7...14

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