NL10276ac28_02L NEC, NL10276ac28_02L Datasheet - Page 6

• Manufacturer Part Number: NL10276ac28_02L
• Description: TFT COLOR LCD MODULE
• Manufacturer: NEC

POWER SUPPLY DESIGN
6
(1) Please note that the supply voltage must not be applied while the control signals (SEL, UP, DOWN, EXIT,
(2) If the power supply voltage is applied while UP and DOWN are connected to GND, the input control signals
(3) Do not change MENUSEL setting while the module is operated.
(4) Inverter current wave
(5) Ripple of supply voltage
Example of the power supply connection
(6) V
LEFT, RIGHT and RESET) are connected to GND. Otherwise the module may cause malfunction.
become ineffective mode. To reset this mode, turn off the power once and turn on the power while UP and
DOWN are connected to GND. Then, the mode will be released.
MENUSEL selection (Hierarchical type or Toggle type) is set when the power supply voltage is applied.
Inverter current wave is as follows.
Please note that the ripple at the input connector of the module should be within the values shown in this
table. It the ripple is beyond these values, the noise may appear on the screen.
DD
Acceptable range
Note The acceptable range of ripple voltage includes spike noise.
B should be started up within 300 ms, otherwise, the protection circuit makes the backlight turn off.
a) Separate the power supply
Power
Power
1460 (mA)
0 (mA)
maximum luminance control: 100 % (Duty)
minimam luminance control: 20 % (Duty)
Luminance control frequency
V
V
DD
DD
B
(for logic and LCD driver)
Luminance control frequency
Duty
Data Sheet EN0456EJ1V0DS00
100 mVp-p
V
DD
=
Input Vsync frequency
Input Vsync frequency
Input Vsync frequency > 75 Hz: K = 3.6
b) Put the filter
Filter* (reference value)
Power
L = 10 H to 100 H
C = 10 F to 100 F
Filter*
Filter*
K
75 Hz: K = 4.6
NL10276AC28-02L
(for backlight)
200 mVp-p
V
DD
V
V
B
DD
DD
B