AT1313
High Efficiency, Constant Current
White-LED Driver
Recommended Operation Conditions
Parameter
Power supply voltage
Operating temperature
Symbol
V
IN
Top
Min.
2.5
-30
Values
Typ.
─
+25
Max.
5.5
+85
Unit
V
℃
Electrical Characteristics
(V
IN
=2.5V, Ta=+25℃, unless otherwise noted)
Parameter
Operating V
IN
Range
Under Voltage Thershold
Switch- Off Input Current
Shutdown Current
Feedback Reference
FB Input Bias Current
Over-voltage Threshold
Over-voltage Hysteresis
OVP Leakage Current
Output Voltage Line Regulation
Switching Frequency
Maximum Duty
Soft-Start charging time
Switching Current Limit
LX ON Resistance
LX Leakage Current
EN Input Current
EN Input Level
EN low Shutdown Delay
EN Low Cycle Time
EN High Cycle Time
Symbol
Test Condition
V
IN
input Voltage
V
IN
UVLO
I
IN1
I
IN3
V
FB
I
FB
V
OVP
I
OVP
f
OSC
D
MAX
t
SS
ILX
R
LX
I
Leakage
I
EN
V
IH
V
IL
t
CYCL
t
CYCH
V
IN
falling, 100mV hysteresis
No Switching , FB>0.2V
EN=0V
V
FB
=0.2V
V
OUT
Rising
EN=0V
2.5V< V
IN
<6.0V
Min.
2.5
2.1
-
-
0.190
-
16
-
-
1.2
-
0.05
-
-
-
-
2.0
-
0.05
0.05
Typ. Max. Units
-
2.2
100
-
0.2
-
18
2
-
0.1
1.4
90
0.5
1.2
0.4
-
-
-
-
4
5.5
2.3
120
1
0.210
1
20
1
-
1.6
-
-
-
1
1
-
0.5
5
5
V
V
uA
uA
V
uA
V
V
uA
%
MHz
%
ms
A
Ω
uA
uA
V
V
ms
ms
ms
V
IN
=3.0V,duty cycle=80% ,
V
IN
=2.5V, ILX =800mA
V
LX
=16V, EN=0V
EN=5V
Note(1)
Note(1)
Note(1): t
CYCL
and t
CYCH
are included rising time and falling time of PWM signal.
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:service@aimtron.com.tw
3
AIMTRON [ AIMTRON TECHNOLOGY ]
