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PDF SGM3146 Data sheet ( Hoja de datos )
| Número de pieza | SGM3146 | |
| Descripción | 8-Channel Charge Pump White LED Driver | |
| Fabricantes | Shengbang Microelectronics | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de SGM3146 (archivo pdf) en la parte inferior de esta página. Total 12 Páginas | ||
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SGM3146
8-Channel Charge Pump White LED
Driver with Low Dropout Current Source
GENERAL DESCRIPTION
The SGM3146 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 SGM3146 supports up to 8 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 1.65mA to 27mA 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.
The SGM3146 is available in Green TQFN-3×3-20L
package and is rated over the -40℃ to +85℃
temperature range.
FEATURES
Input Voltage Range: 2.7V to 5.5V
Drives up to 8 LEDs at 27mA Each
One Single Wire Interface
16-Step Brightness Control
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-3×3-20L Package
APPLICATIONS
Mobile Phone, DSC, MP3
White LED Backlighting
LCD Display Supply
SG Micro Corp
www.sg-micro.com
REV. A. 1
1 page  
SGM3146
8-Channel Charge Pump White LED
Driver with Low Dropout Current Source
TYPICAL PERFORMANCE CHARACTERISTICS
Efficiency vs. Input Voltage
95
85
75
65
VLED = 3.2V
55
2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5
Input Voltage (V)
SG Micro Corp
www.sg-micro.com
Quiescent Current vs. Temperature
0.20
0.18
0.16
0.14
0.12
VIN = 4.2V
0.10
-55 -35 -15 5 25 45 65 85 105
Temperature (℃)
LED Current Regulation vs. Input Voltage
36
27
18
9
VLED = 3.2V
0
2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5
Input Voltage (V)
5
5 Page 
SGM3146
8-Channel Charge Pump White LED
Driver with Low Dropout Current Source
TAPE AND REEL INFORMATION
REEL DIMENSIONS
TAPE DIMENSIONS
P2 P0
W
Q1 Q2
Q3 Q4
Q1 Q2
Q3 Q4
Q1 Q2
Q3 Q4
B0
Reel Diameter
Reel Width (W1)
P1
DIRECTION OF FEED
A0
K0
NOTE: The picture is only for reference. Please make the object as the standard.
KEY PARAMETER LIST OF TAPE AND REEL
Package Type
TQFN-3×3-20L
Reel Width
Reel Diameter
W1
(mm)
13″ 12.4
A0
(mm)
3.3
B0
(mm)
3.3
K0
(mm)
1.1
P0
(mm)
4.0
P1
(mm)
4.0
P2
(mm)
2.0
W
(mm)
12.0
Pin1
Quadrant
Q1
SG Micro Corp
www.sg-micro.com
11
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet SGM3146.PDF ] | |
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