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PDF AT1313 Data sheet ( Hoja de datos )
| Número de pieza | AT1313 | |
| Descripción | High Efficiency Constant Current White-LED Driver | |
| Fabricantes | Aimtron Technology | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de AT1313 (archivo pdf) en la parte inferior de esta página. Total 12 Páginas | ||
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Feature
•Operating Voltage:2.5V~5.5V
•High Operating Frequency: 1.4MHz
•High Output Voltage: Up to 18V
•Shutdown Current <1µA
•18V Output Over-voltage protection
•Digital Dimming Control.
•Built-in Cycle-by Cycle Current-limiting.
•Built-in Soft-Start Function.
•0.2V Low Reference Voltage
•Tiny SOT-26 Package
Application
• LED Module
• Compact Back Light Module
• Constant Current Source
Block Diagram
VIN
AT1313
High Efficiency, Constant Current
White-LED Driver
Description
The AT1313 step-up converter drives white LEDs
with a constant current to provide backlight in cell
phones, PDAs, and other hand-held devices. It
features allowing series connection of the white
LEDs so that the LED currents are identical for
uniform brightness. An enable input can be pulsed
repeatedly to adjust LED’s brightness. The fast 1.4
MHz current-mode PWM control allows for smaller
capacitor and inductor. Fault condition protection
uses cycle-by-cycle current limiting to sense
maximum inductor current, thermal protection and
over-voltage protection. Also included soft-start
eliminates inrush current during start-up. The 0.2V
low reference voltage minimized the power loss
across the current-setting resistor.
The AT1313 is available in 6-pin SOT-26 packages
EN
FB
OVP
VREF
ON/OFF
Control
Logic / PWM
Dimming
Control
CTL
+
-
VREF
0.2V
VBG
1.23V
Soft-Start
Control Logic
18V
VBG
+
-
Overvoltage
Protection
Current Limit
1.2A
+
-
N
CTL
GND
LX
Aimtron reserves the right without notice to change this circuitry and specifications.
7F, No.9, PARK AVENUE II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: 886-3-563-0878 Fax: 886-3-563-0879
WWW: http://www.aimtron.com.tw
10/31/2006 REV:2.0
Email:[email protected]
1
1 page  
Application Circuit
VIN
3.6V to 4.2V
4.7uF
ON
OFF
PWM
Signal
AT1313
High Efficiency, Constant Current
White-LED Driver
10uH
MBR140WS
4.7uF
VIN LX
OVP
AT1313
EN FB
GND
2
Figure 1a. AT1313 Typical Application Circuit with 100mA Output .
VIN
4.7uF
ON
OFF
PWM
Signal
10uH
MBR140WS
4.7uF
VIN LX
OVP
AT1313
EN FB
GND
1
0.333
From DSP
AO3400
Figure 1b. AT1313 Typical Application Circuit with 200mA Output .
7F, No.9, PARK AVENUE II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: 886-3-563-0878 Fax: 886-3-563-0879
WWW: http://www.aimtron.com.tw
10/31/2006 REV:2.0
Email:[email protected]
5
5 Page 
Small Outline SOT-26
be
AT1313
High Efficiency, Constant Current
White-LED Driver
A A2
e1
D
E
C
A1
E1
L
r
SYMBOL
A
A1
A2
b
C
D
E
E1
L
e
e1
r
INCHES
MIN
MAX
0.035
0.057
0.000
0.006
0.035
0.051
0.010
0.020
0.003
0.008
0.110
0.122
0.102
0.118
0.059
0.069
0.014
0.022
0.037ref
0.075ref
00 100
MILLIMETERS
MIN
MAX
0.90 1.45
0.00 0.15
0.90 1.30
0.25 0.50
0.08 0.20
2.80 3.10
2.60 3.00
1.50 1.75
0.35 0.55
0.95ref
1.90ref
00 100
NOTES
-
-
-
-
-
-
-
-
-
7F, No.9, PARK AVENUE II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: 886-3-563-0878 Fax: 886-3-563-0879
WWW: http://www.aimtron.com.tw
10/31/2006 REV:2.0
Email:[email protected]
11
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet AT1313.PDF ] | |
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