Document Number: DOD-PP-0137 (5th edition)
Published date: December 2006 CP(N) 1
This DATA SHEET is updated document from
DOD-PD-1367(4).
All information is subject to change without notice.
Please confirm the sales representative before
starting to design your system.
© NEC LCD Technologies, Ltd.
2003-2006 All rights reserved.
INVERTER
121PW181
DATA SHEET
DOD-PP-0137 (5th edition)
121PW181
DATA SHEET DOD-PP-0137 (5th edition) 2
INTRODUCTION
The Copyright to this document belongs to NEC LCD Technologies, Ltd. (hereinafter called "NEC").
No part of this document will be used, reproduced or copied without prior written consent of NEC.
NEC does and will not assume any liability for infringement of patents, copyrights or other intellectual
property rights of any third party arising out of or in connection with application of the products
described herein except for that directly attributable to mechanisms and workmanship thereof. No license,
express or implied, is granted under any patent, copyright or other intellectual property right of NEC.
Some electronic parts/comp onents would fail or malfunction at a certain rate. In spite of every effort to
enhance reliability of products by NEC, the possibility of failures and malfunction might not be avoided
entirely. To prevent the risks of damage to death, human bodily injury or other property arising out
thereof or in connection therewith, each customer is required to take sufficient measures in its safety
designs and plans including, but not limited to, redundant system, fire-containment and anti-failure.
The products are classified into three quality grades: "Standard", "Special", and "Specific" of the
highest grade of a quality assurance program at the choice of a customer. Each quality grade is designed
for applications described below. Any customer who intends to use a product for application other than
that of Standard quality grade is required to contact an NEC sales representative in advance.
The Standard quality grade applies to the products developed, designed and manufactured in
accordance with the NEC standard quality assurance progra m, which are designed for such application as
any failure or malfunction of the products (sets) or parts/components incorporated therein a customer uses
are, directly or indirectly, free of any damage to death, human bodily injury or other property, like general
electronic devices.
Examples: Computers, office automation equipment, communications equipment, test and measurement
equipment, audio and visual equipment, home electronic appliances, machine tools, personal
electronic equipment, industrial robots, etc.
The Special quality grade applies to the products developed, designed and manufactured in accordance
with an NEC quality assurance program stricter than the standard one, which are designed for such
application as any failure or malfunction of the products (sets) or parts/components in corporated therein a
customer uses might directly cause any damage to death, human bodily injury or other property, or such
application under more severe condition than that defined in the Standard quality grade without such
direct damage.
Examples: Control systems for transportation equipment (automobiles, trains, ships, etc.), traffic control
systems, anti-disaster systems, anti-crime systems, medical equipment not specifically
designed for life support, safety equipment, etc.
The Specific quality grade applies to the products developed, designed and manufactured in accordance
with the standards or quality assurance program designated by a customer who requires an extremely
higher level of reliability and quality for such products.
Examples: Military systems, aircraft control equipment, aerospace equipment, nuclear reactor control
systems, medical equipment/devices/systems for life support, etc.
The quality grade of this produc t is the "Standard" unless otherwise specified in this document.
121PW181
DATA SHEET DOD-PP-0137 (5th edition) 3
CONTENTS
INTRODUCTION ..........................................................................................................................................2
1. OUTLINE....................................................................................................................................................4
2. SPECIFICATION.......................................................................................................................................4
2.1 GENERAL SPECIFICATIONS..............................................................................................................4
2.2 ABSOLUTE MAXIMUM RATINGS ....................................................................................................4
2.3 ELECTRICAL CHARACTERISTICS...................................................................................................5
2.4 FUSE.......................................................................................................................................................5
2.5 CONNECTIONS AND FUNCTIONS FOR INTERFACE PINS...........................................................6
2.6 LUMINANCE CONTROL.....................................................................................................................7
3. RELIABILITY TEST............................................................................................................ .....................7
4. PRECAUTIONS .........................................................................................................................................8
4.1 MEANING OF CAUTION SIGNS........................................................................................................8
4.2 CAUTIONS............................................................................................................................................8
4.3 ATTENTIONS........................................................................................................................................8
4.3.1 Handling of the product.................................................................................................................8
4.3.2 Environment...................................................................................................................................9
4.3.3 Other..............................................................................................................................................9
5. OUTLINE DRAWINGS...........................................................................................................................10
121PW181
DATA SHEET DOD-PP-0137 (5th edition) 4
1. OUTLINE
This 121PW181 inverter is for LCD module. Adaptable LCD modules are as follows.
Adaptable LCD modules
NL10276BC24-13
NL10276BC24-13C
NL8060BC31-27
NL8060BC31-27D
NL8060BC31-28D
NL8060BC31-32
NL8060BC31-41D
NL8060BC31-42
NL8060BC31-42D
2. SPECIFICATION
2.1 GENERAL SPECIFICATIONS
Item Specification Unit
Size See "5.OUTLINE DRAWINGS". mm
Weight 23 (typ.) g
Delivery unit 10 (min.) set
2.2 ABSOLUTE MAXIMUM RATINGS
Parameter Symbol Rating Unit Remarks
Power supply voltage VDDB 0 to +14.0 V
BRTC signal VBC -1.0 to VDDB+1.0 V
Input voltage BRTI signal VBI 0 to +16.0 V
Ta = 25°C
Storage temperature Tst -30 to +85 °C -
Operating temperature Top -10 to +70 °C -
≤ 95 % Ta ≤ 40°C
Relative humidity
Note1 RH
≤ 85 % 40 < Ta ≤ 50°C
Absolute humidity
Note1 AH ≤ 70
Note2 g/m3 Ta > 50°C
Note1: No condensation
Note2: Water amount at Ta=50°C and RH=85%
121PW181
DATA SHEET DOD-PP-0137 (5th edition) 5
2.3 ELECTRICAL CHARACTERISTICS
(Ta=25°C)
Parameter Symbol min. typ. max. Unit Remarks
Power supply voltage VDDB 11.4 12.0 12.6 V Note1, Note2
Power supply current IDDB - 600 800 mΑ (at the maximum
luminance control.)
Note2
High VBCH 2.5 - VDDB V
BRTC signal Low VBCL 0 - 0.4 V
Input voltage
BRTI signal VBI 0 - 2.5 V
-
Open lamp voltage VO 1,600 - - Vrms Ta = -10 to +70
Lamp voltage
(at steady state) VBLH - 570 - Vrms -
High VAMH 4.5 5.0 5.5 V at malfunction
Output voltage
AM signal Low VAML - - 0.5 V at normal
Output current Lamp current
(per lamp) IBL 4.5 5.0 5.5 mArms -
Oscillation frequency FO 58 63 68 kHz
Luminance control frequency FB 310 340 370 Hz -
Note1: When designing of the power supply, take the measures for the prevention of surge voltage.
Note2: The power supply lines (VDDB and GNDB) have large ripple voltage during luminance
control of LCD lamps. There is the possibility that the ripple voltage produces acoustic noise
and signal wave noise in audio circuit and so on. Put a capacitor (5,000 to 6,000
μ
F) between
the power supply lines (VDDB and GNDB) to reduce the noise, if the noise occurred in the
circuit.
2.4 FUSE
Fuse
Parameter Type Supplier
Rating Fusing current Remarks
1.0A
VDDB CCP2E20HTTE KOA Corporation 72V 2.0A Note1
Note1: The power supply capacity should be more than the fusing current. If it is less th an the fusi ng
current, the fuse may not blow in a short time, and then nasty smell, smoke and so on may
occur.
121PW181
DATA SHEET DOD-PP-0137 (5th edition) 6
2.5 CONNECTIONS AND FUNCTIONS FOR INTERFACE PINS
CN1 socket (Inverter side): 53261-0971 (MOLEX Inc.)
Adaptable plug: 51021-0900 (MOLEX Inc.)
Pin No. Symbol Function Remarks
1 VDDB Power supply
2 VDDB Power supply
3 GNDB Ground
4 GNDB Ground
Note1
5 BRTC Backlight ON/OFF signal
High or Open: Backlight ON
Low: Backlight OFF
This pin is pulled-up to VDDB in the
product. Pull-up resistance: 130 kΩ
6 BRTI Luminance control terminal Note2
7 BRTH Luminance control terminal Note2
8 AM Alert signal for malfunction +5.0V output at malfunction Note3
9 RSVD - Keep this pin Open.
Note1: All GNDB and VDDB terminals should be used without any non-connected lines.
Note2: See "2.6 LUMINANCE CONTROL".
Note3: If anyone of terminals Pin No.1, 2 or 4 (CN2) opens, then the alert signal (+5.0V) is output.
CN2 socket (Inverter side): SM03 (7-D1) B-BHS-1-TB(LF)(SN) (J.S.T. Mfg Co., Ltd.)
Adaptable plug (Backlight side): BHR-04VS-1 (J.S.T. Mfg Co., Ltd.)
Pin No. Symbol Signal Remarks
1 VBLH High voltage (Hot) -
2 VBLH High voltage (Hot) -
3 N. C. - Keep this pin Open.
4 VBLC Low voltage (Cold) -
Note1: VBLH and VBLC must be connected correctly. Wrong connections will cause electric shock
and also break down of the product.
121PW181
DATA SHEET DOD-PP-0137 (5th edition) 7
2.6 LUMINANCE CONTROL
Method Adjustment and luminance ratio
• Adjustment
The variable resistor (R) for luminance control should be 10kΩ ±5%, 1/10W. Minimum
point of the resistor is the minimum luminance. Also maximum point of the resistor is the
maximum luminance.
The resistor (R) must be connected between BRTH-BRTI terminals.
• Luminance ratio Note1
Resistance Luminance ratio
0Ω 20% (Min. Luminance)
10kΩ 100% (Max. Luminance)
Resistor control
• Adjustment
Voltage control method works, when BRTH terminal is 0V and VBI voltage is input
between BRTI and BRTH terminal. This control method can carry out continuation
adjustment of luminance.
Luminance is the maximum when BRTI terminal is Open.
• Luminance ratio Note1
BRTI signal (VBI) Luminance ratio
0V 20% (Min. Luminance)
2.5V 100% (Max. Luminance)
Voltage control
Note1: These data are the target values.
3. RELIABILITY TEST
This test is in accordance with the Reliability Test of the adaptable LCD module. Refer to Reliability
Test of the adaptable LCD module.
R
BRTH BRTI
121PW181
DATA SHEET DOD-PP-0137 (5th edition) 8
4. PRECAUTIONS
4.1 MEANING OF CAUTION SIGNS
The following caution signs have very important meaning. Be sure to read "4.2 CAUTIONS" and
"4.3 ATTENTIONS", after understanding these contents!
!
This sign has the meaning that customer will be injured by himself or the product will
sustain a damage, if customer has wrong operations.
This sign has the meaning that customer will get an electrical shock, if customer has
wrong operations.
This sign has the meaning that customer will be injured by himself, if customer has wrong
operations.
4.2 CAUTIONS
∗ Do not touch the inverter while the inverter is working, because there is a danger
of an electric shock.
∗ Do not remove the inverter protection sheet, because there is a danger of an
electrical shock.
∗ Be sure to wait some time after turning power OFF before starting replacement
work, because the inverter is charged at a high voltage after working.
∗ Be sure to wait some time after turning power OFF before starting replacement
work, because the inverter is hot after working.
∗ Do not shock the inverter, because there is a danger of breaking.
4.3 ATTENTIONS
4.3.1 Handling of the product
① Take hold of both ends without touching the circuit board when the product (INVERTER) is picked
up from inner packing box to avoid broken down or misadjustment, because of stress to mounting
parts on the circuit board.
② When handling the product, take the measures of electrostatic discharge with such as earth band,
ionic shower and so on, because the product may be damaged by electrostatic.
③ Do not push nor pull the interface connectors while the product is working.
④ Do not hook nor pull cables such as lamp cable, and so on, in order to avoid any damage.
⑤ Properly connect the adaptable plug (backlight side) to socket (inverter side) without incomplete
connection. After connecting, be careful not to hook the lamp cables because incomplete connection
may occur by hooking the lamp cables. This incomplete connection may cause abnormal operation
of high voltage circuit.
⑥ Adaptable LCD modules of the product has cold cathode fluorescent lamps. After the product is stored
under condition of low temperature or dark place for a long time, the cold cathode fluorescent lamp
may not be turned on under the same condition because of the general characteristic of cold cathode
fluorescent lamp . In addition, when Luminance control ratio is low, the lamp may not be turned on.
In this case, power should be supplied again.
!
121PW181
DATA SHEET DOD-PP-0137 (5th edition) 9
4.3.2 Environment
① Do not operate or store in high temperature, high humidity, dewdrop atmosphere or corrosive gases.
Keep the product in packing box with antistatic pouch in room temperature to avoid dusts and
sunlight, when storing the product.
② In order to prevent dew conden sation occurrin g by temperatu re difference, the product packi ng box
should be opened after enough time being left under the environment of an unpacking room.
Evaluate the leaving time sufficiently because a situation of dew condensation occurring is changed
by the environmental temperature and humidity. (Recommended leaving time: 6 hours or more with
packing state)
③ Do not operate in high magnetic field. Circuit boards may be broken down by it.
④ This product is not designed as radiation hardened.
4.3.3 Other
① All GNDB and VDDB terminals should be used without any non-connected lines.
② Do not disassemble a product.
③ Pack the product with original shipping package, in order to avoid any damages during
transportation, when returning the product to NEC
④ Put the spacer of 1.0mm thickness or more on a product rear side, because of the protection for
contortion.
Spacer example: Thickness= 1.0mm (min.)
Diameter (φ) = 5.0mm (Recommendation)
121PW181
DATA SHEET DOD-PP-0137 (5th edition) 10
5. OUTLINE DRAWINGS
(Unit: mm)
Note1: The values in parentheses are for reference.
