SGM3142

功能特点

产品名称： 6-Channel Charge Pump White LED Driver with Low Dropout Current Source 电荷泵型LED驱动器

产品型号：SGM3142

产品描述：

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.

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 SGM3142 is available in Green TQFN-4×4-16L package and is specified over an ambient temperature range of-40℃ to +85℃.

产品特性：

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

Under Voltage Lockout with Hysteresis

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

应用领域：

White LED Backlighting

White Photo-Flash for DSCs

Color (RGB) Lighting

Programmable Current Source

产品指标：

LED连接方式: Common Cathode

驱动LED 通道数 : 6

1/1.5/2倍 工作模式: 1×/1.5×

静态电流 (μA): 300

关断电流 (μA): < 10

调光方式: One-Wire

电流匹配度: < ±4%

封装形式 TQFN-4×4-16L