Advantech IDK-1107WP Series, Руководство пользователя

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9 IDK-1107WP User Manual
Chapter 2
E
lectrical
Characteristics
2.2 Backlight Unit
2.2.1 Parameter Guideline for LED Backlight
Following characteristics are measured under a stable condition using an inverter at
25°C (Room Temperature):
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°C and ILED=600ADC (LED forward current) until
the brightness becomes <=50% of its original value.
Table 2.3: Parameter Guideline for LED Backlight
Parameter Symbol Min. Typ. Max. Unit Remark
Converter Power Supply Voltage V
i
10.8 12 13.2 V
Converter Power Supply Current I
i
- 0.25 - A @ Vi=12V
(Duty 100%)
Converter Power
Consumption P
LED
- 3 - W @ Vi=12V
(Duty 100%)
EN Control Level
Backlight on 2.0 - 3.3 V
Backlight off 0 - 0.8 V
PWM Control Level
PWM High
Level 2.0 - 3.3 V
PWM Low
Level 0 - 0.15 V
PWM Control Duty Ratio 20 100 %
PWM Control Frequency f
PWM
190 200 210 Hz
LED Life Time L
L
50,000 Hrs