Table of Contents
Advertisement
2.4
Backlight Unit
The following characteristics are measured under stable condition at 25 °C (77 ° F).
Table 2.2: Backlight Driving Conditions
Parameter
Converter Power Supply Voltage
Converter Power Supply Ripple Voltage ViRP
Converter Power Supply Current
Converter Inrush Current
Backlight Power Consumption
EN Control Level
PWM Control Level
PWM Noise Range
PWM Control Duty Ratio
PWM Control Frequency
LED Life Time
Note (1) LED current is measured by utilizing a high frequency current meter
shown below:
Symbol
Vi
Ii
IiRUSH
PBL
Backlight On
BLON
Backlight Off
PWM High Level
E_PWM
PWM Low Level
VNoise
-
fPWM
LL
9
Values
Unit
Min.
Typ.
Max.
10.8
12
13.2
V
-
-
350
mV
-
0.48
0.55
A
-
-
3.0
A
-
5.8
6.6
W
2.5
3.3
5
V
0
-
0.3
V
2.5
3.3
5
V
0
-
0.15
V
-
-
0.1
V
5
-
100
%
20
-
100
%
190
200
20k
Hz
50,000 -
-
Hrs
IDK-1110P-50XGB1 User Manual
Note
@ Vi = 12V
(Duty 100%)
@ Vi rising
time =10ms
(Vi =12V)
@ Vi = 12V
(Duty 100%)
(2), Sugges-
tion,
@190Hz<fP
WM<1kHz
(2), @
1kHz?fPWM
<20kHz
(3)
(2)
Advertisement
Table of Contents
