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SGM3133 PDF Datasheet ( 特性, スペック, ピン接続図 )

部品番号 SGM3133
部品説明 4-Channel Charge Pump White LED Driver
メーカ Shengbang Microelectronics
ロゴ Shengbang Microelectronics ロゴ 

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SGM3133 Datasheet, SGM3133 PDF,ピン配置, 機能
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 -40to +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

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