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Note!
The specified power supply current is under the conditions at Vcc=3.3 V,
Ta=25+/- 2
displayed.
2.2
Backlight Unit
2.2.1
Parameter guideline for LED backlight
Following characteristics are measured under a stable conditions using an inverter at
25° C (Room Temperature):
Parameter
Input Voltage
Input Current
Power Consumption
PWM Control
Backlight
on
EN Control
Level
Backlight
off
PWM
PWM
High Level
Control
PWM Low
Level
Level
PWM Control Duty
Ratio
Operation
Lifetime
Note!
LED current is measured by utilizing a high frequency current meter as
shown below:
Note!
The lifetime LED is defined as the time when it continues to operate
under the conditions: Ta=25 +/-2
current) until the brightness becomes <=50% of its original value. Mini-
mum LED lifetime is estimated and provided by Nichia in Japan.
C, fv=60 Hz, whereas a power dissipation check pattern is
°
Value
Symbol
Min.
Typ.
V
10.8
12
i
I
-
0.7
i
P
-
8
LED
F
190
200
PWM
2.0
-
0
-
2.0
-
0
-
2
-
50,000 -
C and I LED=80 mADC (LED forward
°
7
Unit
Remark
Max.
13.2
[Volt]
(Duty 100%)
@ V
=12 V (Duty 100%)
-
[A]
i
[Watt] @ V
=12 V (Duty 100%)
-
i
20k
[Hz]
5
[Volt]
0.8
[Volt]
5
[Volt]
0.15
[Volt]
100
%
-
Hrs
Note (2) below
IDK-1110P User Manual
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