Advantech IDK-1110WR-series User Manual

Advantech IDK-1110WR-series User Manual Manual pdf 17 page image

11 IDK-1110W User ManualChapter 2 Electrical Characteristics2.2 Backlight Unit2.2.1 Parameter guideline for LED backlightFollowing characteristics are measured under a stable condition using an inverter at25°C (Room Temperature):Note1 The constant current source is needed for white LED back-light driving.When LCM is operated over 60 deg.C ambient temperature, the IL of theLED back-light should be adjusted to 460mA max.There are 6 Groups LED shown as below, VLEDA-LEDK=9.6V ,Ta=25°CNote1 Condition: Ta=25 °C, continuous lightingLife time is estimated data. Definitions of failure:1.LCM brightness becomes half of the minimum value.2.LED doesn’t light normally.When LCM is operated over 40°C ambient temperature, the ILED should be followed:Parameter SymbolValueUnit NoteMin. Typ. Max.LED Driver voltage VLED 4.5 5 5.5 VPower Supply CurrentFor LED DriverILED - 1.4 - A VLED=5VVADJ=3.3V(duty 100%)ADJ Input Voltage VADJ - 3.3 VLED V duty=100%LED_EN Voltage V EN - 3.3 - VLED voltage VAKL - 9.6 10.8 V I L = 540mA,Ta = 25°CLED current I L - 540 - mA Note1- 460 - mA Note1LED Life Time - - 50K - Hour Note2