©2001
104PW161 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.
APPLICATIONS
• High AC voltage generator of cold cathode fluorescent lamp for LCD
FEATURES
• Pulse width modulation circuit
• Alert circuit for malfunction
104PW161
INVERTER for LCD MODULE
DATA SHEET
DC In/AC Out, Externally Communicated System
Document No. EN0542EJ1V0DS00 (1st edition)
Date Published December 2001 N CP(N)
Printed in Japan
The information in this document is subject to change without notice. Before using this document, please
confirm that this is the latest version.
Not all devices/types available in every country. Please check with local NEC representative for
availability and additional information.
Data Sheet EN0542EJ1V0DS
2
104PW161
CONTENTS
1. GENERAL SPECIFICATIONS.............................................................................................................. 3
2. DETAILED SPECIFICATIONS............................................................................................................. 4
2.1 MECHANICAL SPECIFICATIONS ...................................................................................................4
2.2 ABSOLUTE MAXIMUM RATINGS.................................................................................................. 4
2.3 ELECTRICAL CHARACTERISTICS ................................................................................................ 5
2.3.1 Driving for inverter ..................................................................................................................... 5
2.3.2 Fuses............................................................................................................................................ 5
2.4 CONNECTIONS AND FUNCTIONS FOR INTERFACE PINS........................................................ 6
2.4.1 Detail of interface pins ................................................................................................................ 6
2.4.2 Positions of sockets ..................................................................................................................... 6
2.5 LUMINANCE CONTROLS................................................................................................................ 7
3. RELIABILITY TESTS............................................................................................................................ 8
4. PRECAUTIONS....................................................................................................................................... 9
4.1 MEANING OF CAUTION SIGNS ..................................................................................................... 9
4.2 CAUTIONS.......................................................................................................................................... 9
4.3 ATTENTIONS ..................................................................................................................................... 9
4.3.1 Handling of the product............................................................................................................... 9
4.3.2 Environment................................................................................................................................ 9
4.3.3 Other............................................................................................................................................ 9
5. OUTLINE DRAWINGS......................................................................................................................... 10
5.1 FRONT VIEW ................................................................................................................................... 10
5.2 SIDE VIEW ....................................................................................................................................... 10
5.3 REAR VIEW...................................................................................................................................... 10
Data Sheet EN0542EJ1V0DS 3
104PW161
1. 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
100 kΩ (typ.)
Combined load
Stray capacity
5 pF (typ.)
Oscillation frequency 55 kHz (typ.)
Board size 105.0 (W) × 26.5 (H) × 9.5 (D) mm (typ.)
Weight 20.0 g (typ.)
LCD module
NL6448BC33-46
Adaptable product
Lamp holder unit
104LHS35
Data Sheet EN0542EJ1V0DS
4
104PW161
2. DETAILED SPECIFICATIONS
2.1 MECHANICAL SPECIFICATIONS
Parameter Specification Unit
Board size 105.0 ± 0.5 (W) × 26.5 ± 0.5 (H) × 9.5 ± 0.5 (D) Note1 mm
Weight 20.0 (typ.), 23.0 (max.) g
Note1: See "5.OUTLINE DRAWINGS".
2.2 ABSOLUTE MAXIMUM RATINGS
Parameter Symbol Rating Unit Remarks
Resistance RL 105 kΩ
Combined load
Stray capacity CL 5 pF
Power supply for inverter VDDB 0 to +14.0 V
BRTI signal VBI 0 to +16.0 VInput voltage
BRTC signal VBC -1.0 to VDDB+1.0 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%
Data Sheet EN0542EJ1V0DS 5
104PW161
2.3 ELECTRICAL CHARACTERISTICS
2.3.1 Driving for inverter
(Ta = 25°C)
Parameter Symbol Min. Typ. Max. Unit Remarks
Resistance RL 95 100 105 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 - 0.4 V at inverter power OFF
Input voltage
BRTC signal
High VBCH 2.5 - VDDB V at inverter power ON
Input current Power supply for inverter IDDB - 550 750 mΑat maximum luminance,
VDDB = 12.0V Note1
Power supply for
LCD lamp VS 1,200 1,250 1,500 Vrms Starting voltage for lamp,
RL = ∞, CL = ∞
Low VBA 0 - 0.5 V at normal
Output voltage
AM signal
High VBA 4.5 5.0 5.5 V at malfunction
Output current LCD lamp IBL 4.5 5.0 5.5 mArms
Oscillation frequency FO 50 55 60 kHz
Luminance control frequency for LCD lamp FL 220 250 280 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.
2.3.2 Fuses
Fuse
Fusing line Type Supplier Rating Unit Remark
1.5 A Fusing current
Note1
VDDB CCP2E15H KOA Corporation
72 V -
Note1: The power capacity should be more than the fusing current rating. If the power capacity is
less than the criteria value, the fuse may not blow, and then nasty smell, smoking and so on
may occur.
Data Sheet EN0542EJ1V0DS
6
104PW161
2.4 CONNECTIONS AND FUNCTIONS FOR INTERFACE PINS
2.4.1 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 or Open, OFF: Low
6 BRTI Input of luminance control by resistor / voltage control method Note1
7 GNDB Ground -
8 AM Alert for malfunction signal 5.0V output at malfunction
Note1: See "2.5 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)
-
2.4.2 Positions of sockets
CN2: Figure of socket
1 2 3
Insert direction
CN2
←
Protect cover for transformer
Insert direction
Coil
CN1
→
11
1 2 7 8
CN1: Figure of socket
Data Sheet EN0542EJ1V0DS 7
104PW161
2.5 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 50kΩ ± 5%, B curve, 1/10W.
Minimum point of the resistor is the minimum luminance. Also maximum point of the
resistor is the maximum luminance.
• Luminance ratio Note1
Resistance Luminance ratio
0kΩ100% (Maximum)
50kΩ10% (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 10% (Minimum)
Voltage control
Note1: These data are the target values.
R
GNDB BRTI
Data Sheet EN0542EJ1V0DS
8
104PW161
3. RELIABILITY TESTS
Test item Condition Judgment
High temperature and humidity
(Operation)
① 60 ± 2°C, RH = 60%
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 -20 ± 3°C…30minutes
60 ± 3°C…30minutes
② 100cycles, 1hour/cycle
Vibration
(Non operation)
① 10 to 55Hz, Amplitude 0.75mm
② 58 to 500Hz, 9.8m/s2
③ 11 minute/cycle
④ X, Y, Z direction
⑤ 60 minutes each directions
Mechanical shock
(Non operation)
① 980m/ s2, 11ms
② ±X, ±Y, ±Z direction
③ 1 time each directions
No physical damage
No electrical damage
Data Sheet EN0542EJ1V0DS 9
104PW161
4. PRECAUTIONS
4.1 MEANING OF CAUTION SIGNS
The following caution signs have very important meaning. Be sure to read "4.2 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.
4.2 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)
4.3 ATTENTIONS
4.3.1 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.
4.3.2 Environment
① Do not operate in dewdrop atmosphere and corrosive gases.
② Do not operate or store in high temperature or high humidity atmosphere. Keep the product in
antistatic pouch in room temperature, because of avoidance for dusts and sunlight, if customer
stores the product.
③ Do not operate in high magnetic field. Circuit boards may be broken down by it.
4.3.3 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 Pack the product with original shipping package, because of avoidance of some damages during
transportation, when customer returns it to NEC Corporation for repair and so on.
⑤ Put the spacer of 1.0mm thickness or more on a product rear side, because of the protection for
contortion.
Data Sheet EN0542EJ1V0DS
10
104PW161
5. OUTLINE DRAWINGS
5.1 FRONT VIEW
5.2 SIDE VIEW
5.3 REAR VIEW
8.0
+0 .5
-0 .5
50 .0
+2 .0
-2 .0
9.5
+0 .5
-0 .5
105 .0
+0 .5
-0 .5
5.0
+2 .0
-2 .0
26 .5
+0 .5
-0 .5
φ
5.0
+0 .3
-0 .3
2-
φ
2.5
+0 .2
-0 .2
105 .0
+0 .5
-0 .5
105 .0
+0 .5
-0 .5
82 .0
+0 .3
-0 .3
13 .0
+0 .5
-0 .5
(2 .0 )(2 .0 )
15 .0
+0 .3
-0 .3
104PW161
5.0
+0 .5
-0 .5
25 .0
+0 .5
-0 .5
50 .0
+2 .0
-2 .0
26 .5
+0 .5
-0 .5
16 .7
+0 .5
-0 .5
10 .2
+0 .5
-0 .5
99 .0
+0 .5
-0 .5
4.4
+0 .5
-0 .5
104PW161
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DE0203
