Document Number: EN0554EJ2V0DS00 (2nd edition)
Published date: March 2002 N CP(N)
ã NEC Corporation
2002 All rights reserved.
All information is subject to change without notice.
INVERTER
104PW191
DATA SHEET
(2nd edition)
104PW191
DATA SHEET EN0554EJ2V0DS00 2
INTRODUCTION
No part of this document shall be copied in any form or by any means without the prior written consent
of NEC Corporation.
NEC Corporation does not assume any liability for infringement of patents, copyrights or other
intellectual property rights of third parties by or arising from use of a product described herein or any
other liability arising from use of such application. No license, express, implied or otherwise, is granted
under any patents, copyrights or other intellectual property rights of NEC Corporation or of others.
While NEC Corporation has been making continuous effort to enhance the reliability of its products, the
possibility of failures cannot be eliminated entirely. To minimize risks of damage to property or injury to
person arising from a failure in an NEC product, customers must incorporate sufficient safety measures
in their design, such as redundancy, fire-containment and anti-failure features.
NEC products are classified into the following three quality grades:
"Standard", "Special", "Specific"
The "Specific" quality grade applies only to applications developed based on a customer designated
"quality assurance program" for a specific application. The recommended applications of a product
depend on its quality grade, as indicated below. Customers must check the quality grade of each
application before using it in a particular application.
Standard: Computers, office equipment, communications equipment, test and measurement equipment,
audio and visual equipment, home electronic appliances, machine tools, personal electronic
equipment and industrial robots
Special: Transportation equipment (automobiles, trains, ships, etc.), traffic control systems, anti-disaster
systems, anti-crime systems, safety equipment and medical equipment (not specifically
designed for life support)
Specific: Military systems, aircraft, aerospace equipment, submersible repeaters, nuclear reactor control
systems, life support systems (medical equipment, etc.) and any other equipment
The quality grade of this product is "Standard" unless otherwise specified in this document. If
customers intend to use this product for applications other than those specified for "Standard" quality
grade, they should contact NEC Corporation sales representative in advance.
Anti-radioactive design is not implemented in this product.
104PW191
DATA SHEET EN0554EJ2V0DS00 3
CONTENTS
INTRODUCTION.......................................................................................................................................... 2
1. OUTLINE ................................................................................................................................................... 4
1.1 STRUCTURE AND PRINCIPLE.......................................................................................................... 4
1.2 APPLICATIONS .................................................................................................................................... 4
1.3 FEATURES............................................................................................................................................ 4
2. GENERAL SPECIFICATIONS................................................................................................................ 4
3. DETAILED SPECIFICATIONS............................................................................................................... 5
3.1 MECHANICAL SPECIFICATIONS ..................................................................................................... 5
3.2 ABSOLUTE MAXIMUM RATINGS....................................................................................................5
3.3 ELECTRICAL CHARACTERISTICS ..................................................................................................6
3.3.1 Driving for inverter ....................................................................................................................... 6
3.3.2 Fuse ............................................................................................................................................... 6
3.4 CONNECTIONS AND FUNCTIONS FOR INTERFACE PINS.......................................................... 7
3.4.1 Detail of interface pins .................................................................................................................. 7
3.4.2 Positions of sockets....................................................................................................................... 7
3.5 LUMINANCE CONTROLS.................................................................................................................. 8
4. RELIABILITY TESTS.............................................................................................................................. 9
5. PRECAUTIONS....................................................................................................................................... 10
5.1 MEANING OF CAUTION SIGNS ..................................................................................................... 10
5.2 CAUTIONS ......................................................................................................................................... 10
5.3 ATTENTIONS...................................................................................................................................... 10
5.3.1 Handling of the product............................................................................................................... 10
5.3.2 Environment ................................................................................................................................ 10
5.3.3 Other.............................................................................................................................................11
6. OUTLINE DRAWINGS .......................................................................................................................... 12
6.1 FRONT VIEW ..................................................................................................................................... 12
6.2 SIDE VIEW ......................................................................................................................................... 12
6.3 REAR VIEW........................................................................................................................................ 12
104PW191
DATA SHEET EN0554EJ2V0DS00 4
1. OUTLINE
1.1 STRUCTURE AND PRINCIPLE
104PW191 inverter for LCD (Liquid crystal display) modules is composed of a DC/AC inversion
circuit, a luminance control circuit and a boosting transformer.
The DC/AC inversion circuit inverts a direct current (DC) power supply into an altar current (AC) by
the center-tap transmitter circuit that used transistors.
The luminance control circuit can control the luminance of cold cathode lamps for LCD backlight unit.
The boosting transformer is translated the low AC voltage that obtained from a DC/AC inversion circuit
to the high AC voltage. Also the high AC voltage is outputted from a secondary side of the boosting
transformer.
1.2 APPLICATIONS
• High AC voltage generator of cold cathode fluorescent lamp for LCD
1.3 FEATURES
• Pulse width modulation circuit
2. GENERAL SPECIFICATIONS
Driving system Externally commutated system
Luminance control system Pulse width modulation
Input voltage for power supply 12.0 V (typ.)
At steady state
600 Vrms (typ.)
Output voltage
At open (e.g. Start-working of lamp)
1,250 Vrms (typ.)
Resistance
85 kΩ (typ.)
Combined load
Stray capacity
5 pF (typ.)
Oscillation frequency 65 kHz (typ.)
Board size 105.0 (W) × 26.5 (H) × 10.0 (D) mm (typ.)
Weight 20.0 g (typ.)
LCD module
NL10276BC20-04
Adaptable product
Lamp holder unit
104LHS35
104PW191
DATA SHEET EN0554EJ2V0DS00 5
3. DETAILED SPECIFICATIONS
3.1 MECHANICAL SPECIFICATIONS
Parameter Specification Unit
Board size 105.0 ± 0.5 (W) × 26.5 ± 0.5 (H) × 10.0 ± 0.5 (D) Note1 mm
Weight 20.0 (typ.), 23.0 (max.) g
Note1: See "6. OUTLINE DRAWINGS".
3.2 ABSOLUTE MAXIMUM RATINGS
Parameter Symbol Rating Unit Remarks
Resistance RL 90 kΩ
Combined load
Stray capacity CL 5 pF
Power supply for inverter VDDB 0 to +15.0 V
BRTI signal VBI -0.3 to +15.0 VInput voltage
BRTC signal VBC -0.3 to +15.0 V
Ta = 25°C
Storage temperature Tst -30 to +85 °C
Front surface TopF -10 to +70 °C
Operating temperature
Rear surface TopR -10 to +70 °C
-
≤ 95 %Ta ≤ 40°C
≤ 85 %40 < Ta ≤ 50°C
≤ 70 %50 < Ta ≤ 55°C
≤ 60 %55 < Ta ≤ 60°C
≤ 50 %60 < Ta ≤ 65°C
Relative humidity
Note1 RH
≤ 42 %65 < Ta ≤ 70°C
Absolute humidity
Note1 -≤ 78
Note2 g/m3Ta > 70°C
Note1: No condensation
Note2: Ta = 70°C, RH = 42%
104PW191
DATA SHEET EN0554EJ2V0DS00 6
3.3 ELECTRICAL CHARACTERISTICS
3.3.1 Driving for inverter
(Ta = 25°C)
Parameter Symbol Min. Typ. Max. Unit Remarks
Resistance RL - 85 90 kΩ
Combined load
Stray capacity CL - 5 - pF
Power supply for inverter VDDB 10.8 12.0 13.2 V
BRTI signal VBI 0 - 2.5 V
-
Low VBCL 0 - 0.8 V at inverter power OFF
Input voltage
BRTC signal
High VBCH 2.0 - VDDB V at inverter power ON
Input current Power supply for inverter IDDB - 530 750 mΑat maximum luminance,
VDDB = 12.0V Note1
Output voltage Power supply for
LCD lamp VS 1,150 1,250 1,500 Vrms Starting voltage for lamp,
RL = ∞, CL = ∞
Output current LCD lamp IBL 4.5 5.0 5.5 mArms
Oscillation frequency FO 60 65 70 kHz
Luminance control frequency for LCD lamp FL 240 270 300 Hz
-
Note1: The power supply lines (VDDB and GNDB) occurs large ripple voltage while 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 source lines (VDDB and GNDB) to reduce the noise, if the noise occurred in the
circuit.
3.3.2 Fuse
Fuse
Fusing line Type Supplier Rating Fusing current
Note1
1.6 A
VDDB MMCT1.6A S.O.C. Corporation
63 V
3.2 A
Note1: The power supply capacity should be more than the fusing current. If the power supply
capacity is less than the fusing current, the fuse may not blow for a short time, and then
nasty smell, smoking and so on may occur.
104PW191
DATA SHEET EN0554EJ2V0DS00 7
3.4 CONNECTIONS AND FUNCTIONS FOR INTERFACE PINS
3.4.1 Detail of interface pins
CN1 socket: 53261-0890 (MOLEX Inc.)
Adaptable plug: 51021-0800 (MOLEX Inc.)
Pin No. Symbol Function Remarks
1 VDDB Power supply
2 VDDB Power supply
3 GNDB Ground
4 GNDB Ground
-
5 BRTC Inverter ON/OFF signal ON: High, OFF: Low
6 BRTI Input of luminance control by resistor / voltage control method Note1
7 GNDB Ground
8 NC Non connection -
Note1: See "3.5 LUMINANCE CONTROLS".
CN2 socket: SM03 (4.0) B-BHS-TB (J.S.T. Mfg Co., Ltd.)
Adaptable plug: BHR-03VS-1 (J.S.T. Mfg Co., Ltd.)
Pin No. Symbol Signal Remarks
1 VBLC Low voltage (Cold)
2 VBLH High voltage (Hot)
3 VBLH High voltage (Hot)
-
3.4.2 Positions of sockets
Insert direction
CN2
←
Protect cover for transformer
Insert direction
Coil
CN1
→
11
CN1: Figure of socket
1278
CN2: Figure of socket
13
8
3
104PW191
DATA SHEET EN0554EJ2V0DS00 8
3.5 LUMINANCE CONTROLS
Luminance control functions are used when control the luminance of LCD lamps.
Method Adjustment and luminance ratio
• Adjustment
The variable resistor (R) for luminance control should be 10kΩ ± 5%, B curve, 1/10W.
Minimum point of the resistor is the maximum luminance. Also maximum point of the
resistor is the minimum luminance.
• Luminance ratio Note1
Resistance Luminance ratio
0kΩ100% (Maximum)
10kΩ20% (Minimum)
Resistor control
• Adjustment
This control method can carry out continuation adjustment of luminance, if it is adjusted
within the rated voltage for BRTI signal (VBI).
• Luminance ratio Note1
BRTI voltage (VBI) Luminance ratio
0V 100% (Maximum)
2.5V 20% (Minimum)
Voltage control
Note1: These data are the target values.
R
GNDB BRTI
104PW191
DATA SHEET EN0554EJ2V0DS00 9
4. RELIABILITY TESTS
Test item Condition Judgment
High temperature and humidity
(Operation)
① 60 ± 2°C, RH = 95%
② 500hours
High temperature
(Operation)
① 70 ± 3°C
② 500hours
High temperature
(Non operation)
① 85 ± 3°C
② 500hours
Low temperature
(Operation)
① -10 ± 3°C
② 500hours
Low temperature
(Non operation)
① -30 ± 3°C
② 500hours
Thermal shock
(Operation)
① -30 ± 3°C…30minutes
85 ± 3°C…30minutes
② 100cycles, 1hour/cycle
Vibration
(Non operation)
① 10 to 57Hz, Amplitude 0.75mm
② 58 to 500Hz, 9.8m/s2
③ 11 minute/cycle
④ X, Y, Z direction
⑤ 1 hour each directions
Mechanical shock
(Non operation)
① 980m/ s2, 11ms
② ±X, ±Y, ±Z direction
③ 5 times each directions
No physical damage
No electrical damage
104PW191
DATA SHEET EN0554EJ2V0DS00 10
5. PRECAUTIONS
5.1 MEANING OF CAUTION SIGNS
The following caution signs have very important meaning. Be sure to read "5.2 CAUTIONS", after
understanding this contents!
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.
5.2 CAUTIONS
Do not touch HIGH VOLTAGE PART of the inverter while turned on! Danger of an
electrical shock.
∗
∗∗
∗ Pay attention to burn injury for the working inverter! It may be over 25°
°°
°C from
ambient temperature.
∗
∗∗
∗ Do not shock the inverter! Danger of breaking, because they are composed of sensitive
parts. (Shock: To be not greater 980m/s2 and to be not greater 11ms)
5.3 ATTENTIONS
5.3.1 Handling of the product
① Take hold of both ends without touch the mounting parts when customer pulls out products from
inner packing box. If customer touches it, products may be broken down or out of adjustment,
because of stress to mounting parts.
② If customer puts down the product temporarily, the product puts on flat subsoil as a non-mounting
parts side turns down.
③ Take the measures of electrostatic discharge such as earth band, ionic shower and so on, when
customer deals with the product, because products may be damaged by electrostatic.
④ Do not push-pull the interface connectors while the product is working, because wrong power
sequence may break down the product.
5.3.2 Environment
① Do not operate or store in high temperature, high humidity, dewdrop atmosphere or corrosive
gases. Keep the product in antistatic pouch in room temperature, because of avoidance for dusts
and sunlight, if customer stores the product.
② Do not operate in high magnetic field. Circuit boards may be broken down by it.
104PW191
DATA SHEET EN0554EJ2V0DS00 11
5.3.3 Other
① All GNDB and VDDB terminals should be used without a non-connected line.
② Do not disassemble a product or adjust volume without permission of NEC Corporation.
③ Pay attention not to insert waste materials inside of products, if customer uses screwnails.
④ Put the spacer of 1.0mm thickness or more on a product rear side, because of the protection for
contortion.
104PW191
DATA SHEET EN0554EJ2V0DS00 12
6. OUTLINE DRAWINGS
6.1 FRONT VIEW
6.2 SIDE VIEW
6.3 REAR VIEW
8.0
+0 .5
-0 .5
50 .0
+2 .0
-2 .0
105 .0
+0 .5
-0 .5
10 .0
+0 .5
-0 .5
5.0
+2 .0
-2 .0
26 .5
+0 .5
-0 .5
φ
2-
φ
105 .0+0 .5
-0 .5
5.0
+0 .2
-0 .2
2.5
+0 .1
-0 .1
105 .0
+0 .5
-0 .5
50 .0
+2 .0
-2 .0
26 .5
+0 .5
-0 .5
99 .0
+0 .5
-0 .5
104PW191
16 .8
+0 .5
-0 .5
1.0
+0 .5
-0 .5
82 .0
+0 .1
-0 .1
13 .0
+0 .2
-0 .2
5.0
+0 .2
-0 .2
3.1
+0 .5
-0 .5
10 .0
+0 .5
-0 .5
15 .0
+0 .1
-0 .1
25 .0
+0 .3
-0 .3
1.0
+0 .5
-0 .5
