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PDF SGM3138 Data sheet ( Hoja de datos )
| Número de pieza | SGM3138 | |
| Descripción | 6-Channel Charge Pump White LED Driver | |
| Fabricantes | Shengbang Microelectronics | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de SGM3138 (archivo pdf) en la parte inferior de esta página. Total 11 Páginas | ||
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SGM3138
6-Channel Charge Pump White LED
Driver with Low Dropout Current Source
GENERAL DESCRIPTION
The SGM3138 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.
The SGM3138 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 a 4-bit
DAC for brightness control. Users can easily configure
the LED current from 1.25mA to 20mA by a serial pulse.
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.
FEATURES
Input Voltage Range: 2.7V to 5.5V
Drives Up to 6 LEDs at 20mA Each
One Single Wire Interface
16-Step Brightness Control
High Efficiency by Fractional Conversion with
1× and 1.5× Modes
Switching Frequency: 1MHz
Regulated Output Current with ±5% 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
APPLICATIONS
Mobile Phone, DSC, MP3
White LED Backlighting
LCD Display Supply
The SGM3138 is available in Green TQFN-3×3-16L
package and is rated over the -40℃ to +85℃ temperature
range.
SG Micro Corp
www.sg-micro.com
REV. A. 4
1 page  
SGM3138
6-Channel Charge Pump White LED
Driver with Low Dropout Current Source
TYPICAL PERFORMANCE CHARACTERISTICS
90
80
70
60
50
40
2.7
Efficiency vs. Input Voltage
20mA
LED VF = 3V
3.1 3.5 3.9 4.3
Input Voltage (V)
4.7
SG Micro Corp
www.sg-micro.com
LED Current Regulation vs. Input Voltage
25
20
15
10
5
0
3.2 3.6 4 4.4 4.8 5.2 5.5
Input Voltage (V)
5
5 Page 
SGM3138
CARTON BOX DIMENSIONS
6-Channel Charge Pump White LED
Driver with Low Dropout Current Source
NOTE: The picture is only for reference. Please make the object as the standard.
KEY PARAMETER LIST OF CARTON BOX
Reel Type
13″
Length
(mm)
386
Width
(mm)
280
Height
(mm)
370
Pizza/Carton
5
SG Micro Corp
www.sg-micro.com
11
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet SGM3138.PDF ] | |
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