NL6448BC20-18D 查看數據表（PDF） - NEC => Renesas Technology
零件编号
产品描述 (功能)
生产厂家
NL6448BC20-18D Datasheet PDF : 29 Pages
| |||
NL6448BC20-18D
4.3.2 Backlight lamp
(Ta= 25°C, Note1)
Parameter
Symbol min.
typ.
max.
Unit
Remarks
Lamp current
Note3, Note4
IBL
2.0
5.0
5.5
mArms
at IBL=5.0mArms:
L= 400cd/m2
Lamp voltage
Note2, Note3
VBLH
-
360
-
Vrms
-
Lamp starting voltage
Note2, Note3, Note5, Note8
VS
870
-
960
-
-
Vrms
-
Vrms
Ta= 25°C
Ta= -10°C
Lamp oscillation frequency
Note6
FO
50
55
60
kHz
-
Note1: This product consists of 2 backlight lamps, and these specifications are for each lamp.
Note2: The lamp voltage cycle between lamps should be kept on a same phase. "VS" and "VBLH"
are the voltage value between low voltage side (Cold) and high voltage side (Hot).
Note3: The asymmetric ratio of working waveform for lamps (Power supply voltage peak ratio,
power supply current peak ratio and waveform space ratio) should be less than 5 % (See the
following figure.). If the waveform is asymmetric, DC (Direct current) element apply into the
lamp. In this case, a lamp lifetime may be shortened, because a distribution of a lamp
enclosure substance inclines toward one side between low voltage terminal (Cold terminal)
and high voltage terminal (Hot terminal). When designing the inverter, evaluate asymmetric
of lamp working waveform sufficiently.
Pa
Sa
0
Sb
Pb
|Pa - Pb|
Pb × 100 ≤ 5%
|Sa - Sb|
Sb × 100 ≤ 5%
Pa: Supply voltage/current peak for positive, Pb: Supply voltage/current peak for negative
Sa: Waveform space for positive part, Sb: Waveform space for negative part.
Note4: This product consists of 2 lamps. 2 lamps are contained in the 1 lamp holder, and both lamps
are connected to 1 low voltage cable. Recommended lamp current is 5.0mArms typical for
each lamp, and sum of 2 lamps is 10mArms typical. The lamp current should be measured by
high-frequency current meter at the low voltage terminal.
Note5: The inverter should be designed so that the lamp starting voltage can be maintained for more
than 1 second. Otherwise the lamp may not be turned on.
Note6: In case "FO" is not the recommended value, beat noise may display on the screen, because of
interference between "FO" and "1/th". Recommended value of "FO" is as following
FO =
1
4
×
1
th
× (2n-1)
th: Horizontal cycle (See "4.9.2 Timing characteristics".)
n: Natural number (1, 2, 3 ⋅⋅⋅⋅⋅⋅⋅⋅)
Note7: Method of lamp cable installation may invite fluctuation of lamp current and voltage or
asymmetric of lamp working waveform. When designing method of lamp cable installation,
evaluate the fluctuation of lamp current, voltage and working waveform sufficiently.
DATA SHEET DOD-PP-0251 (6th edition)
9
Share Link: 