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PDF SGM3139 Data sheet ( Hoja de datos )
| Número de pieza | SGM3139 | |
| Descripción | 6-Channel 1-Wire Dimming LED Driver | |
| Fabricantes | Shengbang Microelectronics | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de SGM3139 (archivo pdf) en la parte inferior de esta página. Total 10 Páginas | ||
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SGM3139
6-Channel 1-Wire Dimming LED Driver
with Ultra Low Dropout Current Source
GENERAL DESCRIPTION
FEATURES
The SGM3139 is a 6-channel ultra low dropout
constant source parallel LED driver. The SGM3139
uses an internal resistor to set the bias current for six
LEDs, which are matched to ±3%.
The SGM3139 incorporates a single wire interface to
program the output current at 16 continuous steps. It
has an internal deglitch circuit for filtering the noise of
the EN input.
The SGM3139 requires only a 35mV dropout voltage at
a 20mA load. The feature makes SGM3139 ideal for
battery-operated systems, such as personal digital
assistants.
● Ultra Low Dropout: 35mV/20mA
● Support up to 6 LEDs
● LED Sink Current 20mA
● ±3% LED Current Matching
● Deglitch Circuit
● Thermal Shutdown Protection
● 16-Step Brightness Control
● No EMI and Switch Noise
● Operating Temperature Range: -40℃ to +85℃
● Available in Green TQFN-3×3-16L and
TDFN-3×3-10L Packages
TYPICAL APPLICATION
The SGM3139 is available in Green TQFN-3×3-16L
and TDFN-3×3-10L packages and is specified over an
ambient temperature range of -40℃ to +85℃.
APPLICATIONS
Wireless Handsets
MP3, MP4, and PMP
Cellular Phones
Portable Communication Devices
Digital Cameras, Camcorders
PDAs, Palmtops, and Handy Terminals
Battery-Powered Equipment
2.5V to 5.0V
VIN
1µF
Pulse Inpput
12
n=16
SGM3139
PGND
EN/SET
AGND
LED1
LED2
LED3
LED4
LED5
LED6
SG Micro Corp
www.sg-micro.com
REV. A. 3
1 page  
SGM3139
6-Channel 1-Wire Dimming LED Driver
with Ultra Low Dropout Current Source
TYPICAL PERFORMANCE CHARACTERISTICS
LED Current vs. Input Voltage
25
LED1
20
LED2
LED3
LED4
15 LED5
LED6
10
5
0
2.5
3 3.5 4 4.5
Input Voltage (V)
5
LED Current vs. Temperature
24
22
20
18
16
-40
-15 10 35
Temperature (℃)
60
85
LED Current vs. LED Dropout Voltage
25
20
15
10
5
0
0 0.4 0.8 1.2 1.6 2
LED Dropout Voltage (V)
Quiescent Current vs. Temperature
0.8
0.75
0.7
0.65
0.6
-40
-15 10 35
Temperature (℃)
60
85
Line Transient Response
VEN = 3.6V
VIN = 3.2V to 3.7V
VIN
ILED
1V
/div
25mA
0mA
Time (100μs/div)
SG Micro Corp
www.sg-micro.com
5
5 Page | ||
| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet SGM3139.PDF ] | |
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