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参数资料
| 型号： | ENH121XP-300 |
| 英文描述： | High Current LDO with Low IQ and High PSRR; Temperature Range: -40°C to 85°C; Package: 8-MSOP |
| 中文描述： | 12.1寸的XGA |
| 文件页数： | 7/12页 |
| 文件大小： | 191K |
| 代理商： | ENH121XP-300 |
Original specifications created by Sharp.
4
Panelview Hillsboro, OR (503) 690-2460
Panelview is a subsidiary of White Electronic Designs Corporation
ENH121S1-250/350
Panelview
Enhancing the Vision
BACKLIGHT DRIVING
The backlight system is an edge-lighting type with double CCFT (Cold Cathode Fluorescent Tube).
The characteristics of single lamp are shown in the following table.
TA=25°C
Parameter
Symbol
Min.
Typ.
Max
Unit
Remark
Lamp current
IL
2.0
6.0
6.5
mA rms
(1)
Lamp power consumption
PL
3.3
W
(2)
Lamp frequency
FL
20
35
60
KHz
(3)
Kick-off voltage
VS
1200
Vrms
Ta=25°C
1400
Vrms
Ta=0°C (4)
Lamp life time
LL
50000
Hour
(5)
Notes:
1. Lamp current is measured with current meter for high frequency as shown below.
2. At the condition of YL =250cd/m2
3. Lamp frequency may produce interference with horizontal synchronous frequency, and this may cause horizontal beat on the display. Therefore
lamp frequency shall be detached as much as possible from the horizontal synchronous frequency and from the harmonics of horizontal
synchronous to avoid interference.
4. The open output voltage of the inverter shall be maintained for more than 1s; otherwise the lamp may not be turned on.
5. a) Since the lamp is consumable, the life time written above is referential value and it is not guaranteed in this specification sheet by WEDC.
Lamp life time is defined that it applied either 1) or 2) under this condition (Continuous turning on at TA=25°C, IL=6mA rms)
1) Brightness becomes 50% of the original value under standard condition.
2) Kick-off voltage at TA=0°C exceeds maximum value, 1400 V rms.
b) If operating under lower temp environments, the lamp exhaustion is accelerated and the brightness becomes lower. (Continuous
operating for up to 1 month under lower temp conditions may reduce the brightness to 50%.) If using in lower temp environments, periodic
lamp exchange by Panelview is recommended
6. The performance of the backlight, for example life time or brightness, is extremely influenced by the characteristics of the DC-AC inverter for the
lamp. When designing or ordering the inverter, make certain that poor lighting caused by the mismatch of the backlight and the inverter
(mislighting, flicker, etc.) do not occur. Once this is confirmed, the module should be operated in the same condition as it is installed in the
instrument. Recommended inverter is CXA-0217,CXA-0247 or CXA-0231 (TDK corporation)
7. It is required to have the inverter designed to allow the impedance deviation of the two CCFT lamps and the capacity deviation of barast
capacitor.
Module
Inverter
3pin is VLOW
1
3
A
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