NL10276AC28-01E NEC, NL10276AC28-01E Datasheet - Page 6

• Manufacturer Part Number: NL10276AC28-01E
• Description: LCD Module
• Manufacturer: NEC

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POWER SUPPLY
(1) Supply Sequence
(2) Ripple of supply voltage
6
Note Synchronous signal, Control signals and CLK
Please note that the ripple at the input connector of the module should be within the values shown below. If the ripple
Note
would be beyond these values, the noise might appear on the screen.
(a) Logic signals (synchronous signals and control signals) should be “0” voltage (V), when VDD is not input. If higher
(b) LCD module will shut down the power supply of driving voltage to LCD panel internally, when one of CLK, Hsync,
(c) The ON/OFF switching of backlight while logic signals are supplied. The backlight power supply (VDDB) is not
(d) Keep POWC signal “L” more than 200 ms after the power supply (VDD) is input, if POWC signal is controlled.
(e) Analog RGB input are independent from this power supply sequence.
(f) The power supply of backlight VDDB should be the rated voltage witin 80ms after turn-on. Otherwise, the
Acceptable range
Example of rhe power supply connection
protection circuit makes the backlight turn off.
than 0.3 V is input to signal lines, the internal circuit will be damaged.
and Vsync, DE (at DE mode) is not input more than 90 ms typically. As the display data are unstable in this period,
the display is disordered. But the backlight works correctly event this period. So the backlight ON/OFF should
be controlled by BRTC signal.
related to the power supply sequence. However, unstable data will be displayed when the backlight power is
turned ON/OFF with no logic signals.
A coaxial cable shield should be connected with GND.
(a) Separate power supply
Voltage
Power
Power
200 ms<
(for Logic and LCD driver)
CAUTION
Wrong power sequence may damage to the module.
< 100 mVp-p
-
VDD
VDD
VDDB
Logic signals
VDD
(for Backlight)
< 200 mVp-p
-
VDDB
Note
(b) Put filters
Power
* Filter reference value
L = 10 mH to 100 mH
C = 10 mF to 100 mF
0 ms<
Filter *
Filter *
NL10276AC28-01E
T1ime
VDD
VDDB
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