LC640.480.21-065 Operations Manual (OM610-00)
8
Interfacing and Operation
Control Basics
Power Requirements
The LC640.480.21-065 display requires two power supplies: +5 Vdc for the LCD logic
and +12 Vdc for the backlight. In Table 6 below, the backlight current and power are
referenced to maximum luminance, 25 °C ambient temperature.
Table 6. Input Power
Symbol
Min
Typ
Max
Units
Panel
Panel voltage (nominal = 5.0V)
V
CC
4.75
5.0
5.25
Vdc
Absolute max. V
CC
V
CC
-0.3
–
6.5
Vdc
I
CC
(V
CC
= 5.0V)
I
CC
–
470
640
mAdc
Inverter
Inverter voltage (nominal = +12.0V)
V
INV
8.0
12.0
18.0
Vdc
Absolute max. voltage
V
INV
–
–
20.0
Vdc
Current (V
INV
= 8.0V, max. luminance)
I
INV
–
1.6
1.8
Adc
Backlight
Backlight heater voltage
V
LH
8.0
12.0
18.0
Vdc
Backlight heater current
I
LH
–
2.0
3.0
Adc
Cell heater voltage
V
LH
8.0
12.0
18.0
Vdc
Cell heater current
I
LH
–
1.0
1.5
Adc
CAUTION:
Absolute maximum ratings are those values beyond which damage to
the device may occur.
