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PDF SGM3145 Data sheet ( Hoja de datos )
| Número de pieza | SGM3145 | |
| Descripción | 8-Channel PWM Dimming Charge Pump White LED Driver | |
| Fabricantes | Shengbang Microelectronics | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de SGM3145 (archivo pdf) en la parte inferior de esta página. Total 12 Páginas | ||
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SGM3145
8-Channel PWM Dimming
Charge Pump White LED Driver
GENERAL DESCRIPTION
The SGM3145 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 SGM3145 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 PWM
dimming to adjust the brightness of LED. Users can
easily configure the LED current from 0mA to 27mA by a
digital PWM signal. SGM3145 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.
The SGM3145 is available in Green TQFN-3×3-20L
package and is rated over the -40°C to +85°C
temperature range.
FEATURES
Input Voltage Range: 2.7V to 5.5V
Drives up to 8 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-3×3-20L Package
APPLICATIONS
Mobile Phone, DSC, MP3
White LED Backlighting
LCD Display Supply
SG Micro Corp
www.sg-micro.com
REV. A. 1
1 page  
SGM3145
8-Channel PWM Dimming
Charge Pump White LED Driver
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
0.10
-55 -35 -15 5
VIN = 4.2V
25 45 65 85 105
Temperature (℃)
5
5 Page 
SGM3145
TAPE AND REEL INFORMATION
8-Channel PWM Dimming
Charge Pump White LED Driver
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 SGM3145.PDF ] | |
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