Datasheet > SGM3133_16

SGM3133_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	2192K
描述
4-Channel Charge Pump White LED Driver with Low Dropout Current Source

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SGM3133_16 数据手册

SGM3133

4-Channel Charge Pump White LED Driver

with Low Dropout Current Source

GENERAL DESCRIPTION

FEATURES

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.

● 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

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-3×3-16L Package

APPLICATIONS

Mobile Phone, DSC, MP3

White LED Backlighting

LCD Display Supply

The SGM3133 is available in Green TQFN-3×3-16L

package and is specified over an ambient temperature

range of -40℃ to +85℃.

TYPICAL APPLICATION

1μF

C1P

C1N C2P

C2N

2.8V to 5.5V

5,13

VIN

LED4

C_IN

1μF

LED3

LED2

LED1

SGM3133

EN/SET

VOUT

GND

3,10

C_OUT

1μF

Figure 1. Typical Application Circuit

SG Micro Corp

JANUARY 2013–REV.A. 2

www.sg-micro.com

12 3 4 5 6 7...12

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