DATA SHEET
INVERTER for LCD MODULE
104PW161
DC In/AC Out, Externally Communicated System
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
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.
Document No. EN0542EJ1V0DS00 (1st edition)
Date Published December 2001 N CP(N)
Printed in Japan
©
2001
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
2
Data Sheet EN0542EJ1V0DS
104PW161
1. GENERAL SPECIFICATIONS
Driving system
Externally commutated system
Luminance control system
Pulse width modulation
Input voltage for power supply
12.0 V (typ.)
Output voltage
At steady state
600 Vrms (typ.)
At open (e.g. Start-working of lamp)
1,250 Vrms (typ.)
Combined load
Resistance
100 kΩ (typ.)
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.)
Adaptable product
LCD module
NL6448BC33-46
Lamp holder unit
104LHS35
Data Sheet EN0542EJ1V0DS
3
104PW161
2. DETAILED SPECIFICATIONS
2.1 MECHANICAL SPECIFICATIONS
Parameter
Specification
Unit
105.0 ± 0.5 (W) × 26.5 ± 0.5 (H) × 9.5 ± 0.5 (D)
Board size
Weight
Note1
mm
20.0 (typ.), 23.0 (max.)
g
Note1: See "5.OUTLINE DRAWINGS".
2.2 ABSOLUTE MAXIMUM RATINGS
Parameter
Symbol
Rating
Unit
Resistance
RL
105
kΩ
Stray capacity
CL
5
pF
Power supply for inverter
VDDB
0 to +14.0
V
BRTI signal
VBI
0 to +16.0
V
BRTC signal
VBC
-1.0 to VDDB+1.0
V
Tst
-30 to +85
°C
Front surface
TopF
-10 to +70
°C
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
≤ 42
%
65 < Ta ≤ 70°C
≤ 78
Note2
g/m3
Ta > 70°C
Combined load
Input voltage
Storage temperature
Operating temperature
Relative humidity
Note1
Absolute humidity
Note1
RH
-
Note1: No condensation
Note2: Ta = 70°C, RH = 42%
4
Data Sheet EN0542EJ1V0DS
Remarks
Ta = 25°C
-
104PW161
2.3 ELECTRICAL CHARACTERISTICS
2.3.1 Driving for inverter
(Ta = 25°C)
Parameter
Symbol
Min.
Typ.
Max.
Unit
Resistance
RL
95
100
105
kΩ
Stray capacity
CL
-
5
-
pF
10.8
12.0
13.2
V
VBI
0
-
2.5
V
Low
VBCL
0
-
0.4
V
at inverter power OFF
High
VBCH
2.5
-
VDDB
V
at inverter power ON
Power supply for inverter
IDDB
-
550
750
mΑ
Power supply for
LCD lamp
VS
1,200
1,250
1,500
Vrms
Low
VBA
0
-
0.5
V
at normal
High
VBA
4.5
5.0
5.5
V
at malfunction
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
Combined load
Power supply for inverter VDDB
Input voltage
BRTI signal
BRTC signal
Input current
Output voltage
Remarks
-
at maximum luminance,
VDDB = 12.0V Note1
Starting voltage for lamp,
RL = ∞, CL = ∞
AM signal
Output current
LCD lamp
-
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 6,000µF) between
the power source lines (VDDB and GNDB) to reduce the noise, if the noise occurred in the
circuit.
2.3.2 Fuses
Fusing line
VDDB
Fuse
Type
Supplier
CCP2E15H
Rating
Unit
Remark
1.5
A
Fusing current
Note1
72
V
-
KOA Corporation
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
5
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
1
2
3
4
5
6
7
8
VDDB
VDDB
GNDB
GNDB
BRTC
BRTI
GNDB
AM
Function
Remarks
Power supply
Power supply
Ground
Ground
Inverter ON/OFF signal
ON: High or Open, OFF: Low
Input of luminance control by resistor / voltage control method
Note1
Ground
Alert for malfunction signal
5.0V output at malfunction
Note1: See "2.5 LUMINANCE CONTROLS".
CN1: Figure of socket
1 2
7 8
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
2
3
VBLC
VBLH
VBLH
Low voltage (Cold)
High voltage (Hot)
High voltage (Hot)
-
CN2: Figure of socket
1 2 3
2.4.2 Positions of sockets
Coil
CN2
CN1
← Insert direction
1
1
Insert direction →
Protect cover for transformer
6
Data Sheet EN0542EJ1V0DS
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.
GNDB
Resistor control
BRTI
R
• Luminance ratio Note1
Resistance
Luminance ratio
0kΩ
100% (Maximum)
50kΩ
10% (Minimum)
• Adjustment
This control method can carry out continuation adjustment of luminance, if it is adjusted
within the rated voltage for BRTI signal (VBI).
Voltage control
• Luminance ratio Note1
BRTI voltage (VBI)
Luminance ratio
0V
100% (Maximum)
2.5V
10% (Minimum)
Note1: These data are the target values.
Data Sheet EN0542EJ1V0DS
7
104PW161
3. RELIABILITY TESTS
Test item
High temperature and humidity
(Operation)
Judgment
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)
8
Condition
① 980m/ s2, 11ms
② ±X, ±Y, ±Z direction
③ 1 time each directions
Data Sheet EN0542EJ1V0DS
No physical damage
No electrical damage
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
9
104PW161
5. OUTLINE DRAWINGS
5.1 FRONT VIEW
105 .0 +0-0 .. 55
82 .0 +0-0 .3.3
13 .0 +0-0 .. 55
4 . 4 +- 00 .. 55
5 0 . 0 +- 22 .. 00
9 9 . 0 +- 00 .. 55
9 . 5 +- 00 .. 55
8 . 0 +- 00 .. 55
5.2 SIDE VIEW
105 .0 +0-0 .. 55
5 0 . 0 +- 22 .. 00
5.3 REAR VIEW
26 .5
+0 .2
2 - φ 2 . 5 -0 .2
+0 .5
105 .0 -0 .5
φ 5 . 0 +- 00 .. 33
10
+2 . 0
-2 . 0
+0 .5
-0 .5
5 .0
Data Sheet EN0542EJ1V0DS
2 6 . 5 +- 00 .. 55
2 5 . 0 +- 00 .. 55
5 . 0 +- 00 .. 55
1 0 4 PW 1 6 1
1 6 . 7 +- 00 .. 55
(2 .0 )
10 .2 +0-0 .5.5
15 .0 +0-0 .3.3
(2 .0 )
104PW161
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DE0203