104PW161 - NEC Electronics

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

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

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

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

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

→

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.

GNDB BRTI

Data Sheet EN0542EJ1V0DS

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

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

5.0

+0 .3

-0 .3

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