AT1312A/B/C
Preliminary Product Information
High Efficiency, Constant Current
White-LEDs Driver
Electrical Characteristics
(VIN=2.5V, Ta=+25℃, unless otherwise noted)
Parameter
Symbol
Test Condition
VIN input Voltage
Min. Typ. Max. Units
Operating V IN Range
VIN
2.5
-
6.0
2.3
V
V
Under Voltage Thershold
Switch- Off Input Current
Shutdown Current
UVLO VIN falling, 100mV hysteresis 2.1
2.2
IIN1
IIN3
VFB
IFB
No Switching
EN=0V
-
-
100 120
µA
µA
V
-
1
Feedback Reference
0.190 0.2 0.210
FB Input Bias Current
VFB =0.2V
-
-
1
µA
VOUT Rising (AT1312A)
VOUT Rising (AT1312B)
VOUT Rising (AT1312C)
-
-
-
28
23
16
-
25
18
V
V
V
Over-voltage Threshold
VOVP
Over-voltage Hysteresis
OVP Leakage Current
2
V
µA
%
IOVP
EN=0V
2.5V< VIN <6.0V
-
-
1
Output Voltage Line Regulation
Switching Frequency
Maximum Duty
-
0.1
1
-
-
-
-
fOSC
DMAX
tSS
-
-
MHz
%
90
0.5
Soft-Start charging time
0.05
ms
VIN=3.0V,duty cycle=80% ,
(AT1312A)
-
-
-
400
300
200
-
-
-
mA
mA
Switching Current Limit
VIN=3.0V,duty cycle=80% ,
(AT1312B)
I
LX
VIN=3.0V,duty cycle=80% ,
mA
(AT1312C)
VIN =2.5V, I
LX
=200mA
Ω
LX ON Resistance
LX Leakage Current
EN Input Current
RLX
ILeakage
IEN
-
0.3
-
5
VLX =16V/23V/28V, EN=0V
-
-
µA
µA
V
EN=5V
0.1V hysteresis
-
2.0
-
-
1
VIH
-
-
EN Input Level
VIL
-
4
0.8
-
V
EN low Shutdown Delay
EN Low Cycle Time
-
ms
ms
ms
℃
tCYCL
tCYCH
*1
*1
0.05
0.05
-
-
5
EN High Cycle Time
Thermal Shutdown
-
5
120
-
*1: tCYCL and tCYCH 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
2/23/2006 REV:1.1
Fax: 886-3-563-0879
WWW: http://www.aimtron.com.tw
Email: service@aimtron.com.tw
4
AIMTRON [ AIMTRON TECHNOLOGY ]
