Parameter Guide Line For Ccfl Inverter - HP Compaq L1702 Service Manual

5.4.4 Parameter guide line for CCFL Inverter

Back-Light Unit：
AU EN05
SYMBOL PARAMETER
(L63) White Luminance
ISCFL CCFL standard current
IRCFL CCFL operation range
ICFL CCFL Inrush current
CCFL Frequency
fCFL
ViCFL
CCFL ignition Voltage
(0℃)
ViCFL
CCFL ignition Voltage
(25℃)
TCFL CCFL Dark start time
CCFL Discharge Voltage
VCFL
(Reference)
PCFL CCFL Power consumption
QDI L07
The backlight system is an edge-lighting type with 2- CCFL(Cold Cathode Fluorescent Lamp).
The characteristics of four lamps are shown in the following tables.
PARAMETER
Lamp current range
Lamp voltage
Lamp power consumption
Lamp frequency
Established starting voltage
Lamp life time
MIN
200
6.5
3.0
–
40
1700
1200
SYMBOL MIN TYP
I 3.0 7.0
L
V 725
L
P 5.1
L
FL 52
Vs
L 40000 50000
L
Page 19 of 143
HP L1702/FP7317 Service Manual
TYP MAX UNITS
[cd/㎡]
260 –
[mA]
7.0 7.5
[mA]
7.0 7.5
26 34 [mA]
50 80 [KHz]
[Volt]
[Volt]
1.0
[Volt]
700 860
19.6 25.8 [Watt]
MAX UNIT
8.0 mArms Note1
Vrms
W Note2 IL=7.0mA
kHz Note3
Vrms Ta=25℃
1100
Vrms Ta=0℃
1420
hour Note5
CONDITION
(Ta=25℃)
(Ta=25℃)
rms
(Ta=25℃)
rms
Note 1
(Ta=25℃)
Note 2
(Ta=0℃)
rms Note 3
(Ta=25℃)
rms Note 3
(Ta=25℃)
sec
(Ta=25℃)
rms Note 4
(Ta=25℃)
Note 4
REMARK
Note4