Specifications

PRODUCT SPECIFICATION
Version 2.4 23 August 2011 10 / 28
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3.2 BACKLIGHT UNIT Ta = 25 ± 2 ºC
Value
Parameter Symbol
Min. Typ. Max.
Unit Note
Converter Power Supply Voltage V
i
10.8 12.0 13.2
V
Converter Power Supply Current I
i
--- 0.263 --- A
@ Vi = 12V
(Duty 100%)
Converter Power Consumption P
LED
--- 3.15 --- W
@ Vi = 12V
(Duty 100%)
Backlight on 2.0 --- 5 V
EN Control Level
Backlight off 0 --- 0.8 V
PWM High Level 2.0 --- 5 V
PWM Control Level
PWM Low Level 0 --- 0.15 V
PWM Control Duty Ratio
10 100 %
PWM Control Frequency f
PWM
100 200 300 Hz
LED Life Time L
L
50,000 Hrs (2)
Note (1) LED current is measured by utilizing a high frequency current meter as shown below:
Note (2) The lifetime of LED is defined as the time when it continues to operate under the conditions at
Ta = 25 ±2 ℃ and I
LED
= 55mA
DC
(LED forward current) until the brightness becomes 50% of its ≦
original value.
Note (3)
Please note that LED life will be shorter than the average life described in the specification if
operate in higher ambient temperature.
Power Supply
Converter
LED
Backlight
Unit
Vi
,
Ii
GND
Input Power
Pi
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