NL12810AC28_01F NEC, NL12810AC28_01F Datasheet - Page 6

• Manufacturer Part Number: NL12810AC28_01F
• Description: TFT COLOR LCD MODULE
• Manufacturer: NEC

POWER SUPPLY DESIGN
(1) 12 V for backlight shouid be started up with in 800ms otherwise, the protection circuit makes the backlight turns
(2) Please note that the supply voltage must not be applied while the control signals (SEL, UP, DOWN, EXIT) are
(3) If the power supply voltage is applied while UP and DOWN are connected to GND, the input control signals
(4) Inverter current wave
(5) Ripple of supply voltage
6
Example of the power supply connection
off.
connected to GND. Otherwise, the module may malfunction.
become ineffective. To reset this mode, turn off the power once and then turn on the power while UP and
DOWN are connected to GND. The mode will then be released.
The inverter current wave is as follows.
Acceptable range
Remark The acceptable range of ripple voltage includes spike noise.
a) Separate the power supply
Power
Power
2550 (mA) typ
0 (mA)
Maximum luminance control: 100%
Minimum luminance control: 20% (Duty)
Luminance control frequency
Please set up like above diagram.
V
V
DD
DDB
(for logic and LCD driver)
Luminance control frequency
Duty
Data Sheet EN0509EJ1V0DS00
100 mV p-p
V
DD
=
Input Vsync frequency
Input Vsync frequency
Input Vsync frequency > 75 Hz: K = 3.6
b) Put in the filter
Power
Filter* (Reference value)
L = 10 H to 100 H
C = 10 F to 100 F
Filter*
Filter*
K
75 Hz: K = 4.6
NL128102AC28-01F
(for backlight)
200 mV p-p
V
DDB
V
V
DD
DDB