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2.2
Backlight Unit (LED Driver Board)
Following characteristics are measured under stable condition at 25°C:
Table 2.3: Backlight driving conditions
Item
Input Voltage
Input Current
Power Consumption
PWM Dimming Frequency
Dimming Duty Cycle
LED Forward Current
On Control Voltage
Off Control Voltage
LED Life Time
Note 1: PWM dimming function can be operated by PWM signal. PWM duty cycle
can adjust white Luminance. (PWM High: ON and PWM Low: OFF)
Note 2: PWM signal cannot be floating and pull-down to ground when waiting.
Note 3: Enable (
Note 4: Enable (
Note 5: If this module is driven by high current or at high ambient temperature &
humidity condition. The operating life will be reduced.
Note 6: Operating life means brightness goes down to 50% initial brightness. Mini-
mum operating life time is estimated data.
Symbol
V
LED
I
LED
P
LED
F
PWM
D
PWM
I
F
V
LED ON/OFF
-
) must be turned on late than
V
LED ON/OFF
) must be turned off early than
V
LED ON/OFF
Values
Min.
Typ.
Max.
10.8
12
13.2
1.05
1.3
1.6
11.34
15.6
21.12
500
-
40K
5%
-
100
-
400
420
1.5
5
-
-
0
0.8
50,000
and PWM Signal.
V
LED
V
LED
9
Unit
Condition
[Volt]
[A]
[Watt]
[Hz]
Note 1,2
[%]
[mA]
One light bar
[Volt]
Note 3,4
[Volt]
[Hrs]
Note 5,6
and PWM Signal.
IDK-2117 User Manual
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