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2.2
Backlight Unit
Parameter
Converter Power Supply Voltage
Converter Power Supply Current
Backlight Power Consumption
EN Control Level
PWM Control Level
PWM Control Duty Ratio
PWM Control Frequency
LED Life Time
Note1: LED current is measured by utilizing a high frequency current meter as
shown below
Note2: At 20k Hz PWM control frequency, duty ratio range is restricted from 20% to
100%
Note3: The lifetime of an LED is defined as the time when it continues to operate
under the conditions at Ta = 25
becomes ≤ 50% of its original value. Operating an LED under a high temper-
ature environment will reduce its life time and lead to color shift.
Symbol
V
i
I
i
P
PBL
Backlight on
-
Backlight off
PWM High
Level
-
PWM Low
Level
-
f
PWM
L
L
±
9
Value
Min.
Typ.
Max.
10.8
12.0
13.2
-
0.73
0.83
-
-
8.76
2.0
3.3
5.0
0
-
0.8
2.0
3.3
5.0
0
-
0.15
1
-
100
190
200
20k
50,000 -
-
2°C and Duty 100% until the brightness
IDK-1115R User Manual
Unit
Note
V
A
@ Vi =
12V
W
@ Vi =
12V
V
V
V
V
%
@200Hz
Hz
(2)
Hrs
(3)
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