Datasheet > SGM3144_16

SGM3144_16

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
12页	2121K
描述
6-Channel PWM Dimming Charge Pump White LED Driver

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SGM3144_16 数据手册

SGM3144

6-Channel PWM Dimming

Charge Pump White LED Driver

GENERAL DESCRIPTION

FEATURES

The SGM3144 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.

● Input Voltage Range: 2.7V to 5.5V

● Drives up to 6 LEDs at 27mA Each

● PWM Dimming

● 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-3×3-16L Package

The SGM3144 supports up to 6 white LEDs and

regulates a constant current which the initial value can

be set by an internal resistor. The part implements

PWM dimming to adjust the brightness of LED. Users

can easily configure the LED current from 0mA to

27mA by a digital PWM signal. SGM3144 can be

turned off by EN pin. 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.

APPLICATIONS

Mobile Phone, DSC, MP3

White LED Backlighting

LCD Display Supply

The SGM3144 is available in Green TQFN-3×3-16L

package and is rated over the -40°C to +85°C

temperature range.

SG Micro Corp

JANUARY 2013–REV. A. 1

www.sg-micro.com

12 3 4 5 6 7...12

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