Datasheet SP4425NEB, SP4425UEB, SP4425CN, SP4425CU, SP4425CX Datasheet (Sipex Corporation)

®

SP4425

Electroluminescent Lamp Driver

Low V olta ge Applications

■ Low Voltage, Single Battery Operation
(V

■ DC to AC Inverter for EL Backlit
Display Panels

■ Externally Adjustable Internal Oscillator

■ Low Current Standby Mode

APPLICATIONS

■ Pagers

■ Digital Watches

■ Backlit LCD Displays

DESCRIPTION

The SP4425 is a high voltage output DC-AC converter that can operate from a single 1.5 VDC
power supply. The SP4425 is capable of supplying up to 220 VPP signals, making it ideal for
driving electroluminescent lamps. The device features 1 µA (typical) standby current for use
in low power portable products. One external inductor is required to generate the high voltage
charge and one external capacitor is used to select the oscillator and lamp frequencies.
The SP4425 is offered in both an 8-pin narrow SOIC and 8-pin micro SOIC package.
For delivery in die form, please consult the factory.

BATTERY

> 1.1 VDC)

C

OSC

V

SS

COIL

D1

SP4425 Block Diagram

SP4425DS/20 SP4425 Electroluminescent Lamp Driver © Copyright 2000 Sipex Corporation

1
2

3
4

SP4425

1

8
7

6
5

HON
V

DD

EL1

EL2

ABSOLUTE MAXIMUM RATINGS

These are stress ratings only and functional operation of the device at
these ratings or any other above those indicated in the operation sections
of the specifications below is not implied. Exposure to absolute maximum
rating conditions for extended periods of time may affect reliability.

VDD...................................................................................................................5V

Input Voltages/Currents

Lamp Outputs..............................................................................230V

Storage Temperature....................................................-65˚C to +150˚C

Power Dissipation Per Package

8-pin NSOIC (derate 6.14mW/oC above +70oC).................................500mW

8-pin µSOIC (derate 4.85mW/oC above +70oC)..................................390mW

HON (pin1)........................................-0.5V to (V

COIL (pin3)............................................................100mA

DD

+ 0.5V)

The information furnished herein by Sipex has been carefully reviewed for
accuracy and reliability. Its application or use, however, is solely the
responsibility of the user. No responsibility for the use of this
information is assumed by Sipex, and this information shall not explicitly or
implicitly become part of the terms and conditions of any subsequent sales
agreement with Sipex. Specifications are subject to change without prior
notice. By the sale or transfer of this information, Sipex assumes no
responsibility for any infringement of patents or other rights of third parties
which may result from its use. No license or other proprietary rights are
granted by implication or otherwise under any patent or patent rights of
Sipex Corporation.

PP

SPECIFICATIONS

(T= 25°C; VDD = 1.5V; Lamp Capacitance = 8200pFwith 1 00Ω Series resistance; Coil = 470µH at 4 Ohms; C

RETEMARAP.NIM.PYT.XAMSTINUSNOITIDNOC

V,egatloVylppuS

DD

I+

,tnerruCylppuSI

LIOC

DD

V,egatloVlioC

LIOC

V,egatloVtupnINOH

NOH

ffoLE:WOL

noLE:HGIH

noLE,tnerruCNOH351

I=

I+

I,tnerruCnwodtuhS

DS

LIOC

DD

EVIRDROTCUDNI

f=

f,ycneuqerFlioC

46x6.52zHk

LIOC

PMAL

elcyCytuDlioC09%

I,tnerruClioCkaeP

LIOC-KP

TUPTUOPMALLE

f,ycneuqerFpmaLLE

PMAL

egatloVtuptuOkaePotkaeP

1.15.17.1V
0306AmV

V

DD

52.0-

VDD52.0-

0

V

DD

7.1

V52.0

VDD52.0+

V

V

µA

15

µA

09Am.ngisedybdeetnarauG

003004005zH

021

09

061

V

PP

V

T

BMA

T

BMA

T

BMA

T

BMA

= 180pF unless otherwise noted); C

OSC

V=DDV5.1=

NOH

V=

V,nwodlluplanretni

NOH

DD

V0=

NOH

O

52+=

V,C

V5.1=

DD

O

04-=

52+=

O

04-=

O

V,C

O

58+otC

DD

O

58+otC

V,C

DD

V5.1=

V,C

DD

=1800pF

INT

V5.1=

V5.1=

V5.1=

SP4425DS/20 SP4425 Electroluminescent Lamp Driver © Copyright 2000 Sipex Corporation

2

(T= 25°C; VDD = 3.0V; Lamp Capacitance = 4nF with 100Ω Series resistance; Coil = 2mH/44ohms; C

RETEMARAP.NIM.PYT.XAMSTINUSNOITIDNOC

V,egatloVylppuS

DD

I+

,tnerruCylppuSI

LIOC

DD

V,egatloVlioC

LIOC

V,egatloVtupnINOH

NOH

ffoLE:WOL

noLE:HGIH

noLE,tnerruCNOH502

I=

I+

I,tnerruCnwodtuhS

DS

LIOC

DD

2.20.33.3V
8253AmV

V

DD

V

DD

52.0-

52.0-

0

V

DD

3.3

V

DD

V52.0

V

V

52.0+
µA

18

µA

EVIRDROTCUDNI

f=

f,ycneuqerFlioC

46x8.82zHk

LIOC

PMAL

elcyCytuDlioC09%

I,tnerruClioCkaeP

LIOC-KP

09Am.ngisedybdeetnarauG

TUPTUOPMALLE

f,ycneuqerFpmaLLE

PMAL

egatloVtuptuOkaePotkaeP

053
572

021
071
021

054055

577

zH

051
091V

PP

= 180pF, C

OSC

NOH

= 470pF unless otherwise noted)

INT

V=DDV3=

V,nwodlluplanretni

V

V0=

NOH

O

T

52+=

BMA

T

BMA

T

BMA

T

BMA

T

BMA

V,C

DD

O

04-=

04-=

58+otC

O

52+=

V,C

DD

O

52+=

V,C

DD

O

58+otC

V=

V3=

NOH

DD

V0.3=

O

V,C

V0.3=

DD

V2.2=
V0.3=

O

V,C

V0.3=

DD

This data sheet specifies environmental parameters, final test conditions and limits as well suggested operating conditions.
For applications which require performance beyond the specified condition and or limits please consult the factory.

Bonding Diagram:

HON

V

DD

EL1

PAD X Y

V

DD

261.0 427.0
EL1 813.0 429.0
EL2 813.0 28.0
D1 813.0 -172.0
COIL 767.0 -381.0

V

C

OSC

EL2

D1

73 x 46
MS666

V

SS

SP4425DS/20 SP4425 Electroluminescent Lamp Driver © Copyright 2000 Sipex Corporation

Coil

SS

C

OSC

HON -785.5 402.0

NOTES:

1. Dimensions are in Microns unless otherwise noted.

2. Bonding pads are 125x125 typical.

3. Outside dimensions are maximum, including scribe area.

4. Die thickness is 10 mils +/- 1.

5. Pad center coordinates are relative to die center.

6. Die size 74 x 44 mils.

143.5 -412.0

-790.0 -157.5

3

PIN DESCRIPTION

1

SP4425

2
3
4

Pin 1 – C
from VSS to Pin 1 to set C

- Capacitor input 1, connect Capacitor

OSC

OSC

8
7
6
5

frequency.

Pin 2 – VSS- Power supply common, connect to
ground.

Pin 3 – Coil- Coil input, connect coil from V
to pin 3.

DD

Pin 4 – D1- Diode Cathode connection.
– C
from pin 4 to ground to minimize coil glitch energy.

- Integrator capacitor, connect capacitor

INT

Pin 5 – Lamp- Lamp driver output2, connect to
EL lamp.

Pin 6 – Lamp- Lamp driver output1, connect to
EL lamp.

Pin 7 – VDD- Power supply for driver, connect to
system VDD.

Pin 8 – HON- Enable for driver operation,
high = active; low = inactive.

THEORY OF OPERATION

The SP4425 is made up of three basic circuit
elements, an oscillator, coil, and switched H-bridge
network. The oscillator provides the device with
an on-chip clock source used to control the charge
and discharge phases for the coil and lamp. An
external capacitor connected between pins 1 and
VSS allows the user to vary the oscillator frequency.
For a given choice of coil inductance there will be
an optimum C
maximum light output.

Capacitor value that gives the

OSC

The suggested oscillator frequency is 25.6kHz
(C

=180pF). The oscillator output is internally

OSC

divided to create the control signal for f
oscillator output is internally divided down by 6

LAMP

. The

flip flops, a 25.6kHz signal will be divided into 6
frequency levels: 12.8kHz, 6.4kHz, 3.2kHz,

1.6kHz, 800Hz, and 400Hz. The oscillator output
(25.6kHz) is used to drive the coil (see figure 2 on
page 11) and the sixth flip flop output (300Hz) is
used to drive the lamp. Although the oscillator
frequency can be varied to optimize the lamp
output, the ratio of f

COIL/fLAMP

will always equal 64.

The coil is an external component connected from
V
VDC with a 470µH/4Ω coil are typical conditions.

to pin 3 of the SP4425. V

BATTERY

BATTERY

= 1.5

Energy is stored in the coil according to the equation
EL=1/2LI2, where I is the peak current flowing in

V

BATTERY

f

f

COIL

LAMP

f

LAMP

Coil

3

470µH/4Ω

EL Lamp

IN4148

SCR1

EL2 EL1

5

6

C

=1800pF typ

INT

4

D1

SCR2

Low ESR
decoupling
capacitor

.1µF

180pF

C

1

OSC

V

DD

7

V

DD

OSC
Cap1

FF1 FF6

V

2

8

HON

1MΩ

Q

Q

SS

SP4425 Schematic

SP4425DS/20 SP4425 Electroluminescent Lamp Driver © Copyright 2000 Sipex Corporation

4

the inductor. The current in the inductor is time
dependent and is set by the "ON" time of the coil
switch: I=(VL/L)tON, where VL is the voltage across
the inductor. At the moment the switch closes, the
current in the inductor is zero and the entire supply
voltage (minus the V
inductor. The current in the inductor will then

of the switch) is across the

SAT

ramp up at a linear rate. As the current in the
inductor builds up, the voltage across the inductor
will decrease due to the resistance of the coil and
the "ON" resistance of the switch: VL=V
IRL-V
decreasing, the current ramp-rate also decreases

. Since the voltage across the inductor is

SAT

BATTERY

-

which reduces the current in the coil at the end of
tON the energy stored in the inductor per coil cycle
and therefore the light output. The other important
issue is that maximum current (saturation current)
in the coil is set by the design and manufacturer of
the coil. If the parameters of the application such
as V
to increase beyond its rated I
will be generated and the power efficiency will

, L, RL or tON cause the current in the coil

BATTERY

, excessive heat

SAT

decrease with no additional light output.
The majority of the current goes through the coil

and typically less than 2mA is required for VDD of
the SP4425. VDD can range from 1.5V to 3.0V; it is
not necessary that VDD=V
function of the core material and winding used --

. Coils are also a

BATTERY

performance variances may be noticeable from
different coil suppliers. The Sipex SP4425 is final
tested at 1.5V using a 470µH/4Ω coil from Toko,
and a 2mH/44Ω coil from Matsushita at 3V.
For suggested coil sources see page 12.

The f
end of the coil at pin 3 to ground or to open circuit.
The f
at the oscillator frequency. During the time when
the f
V
created in the coil. During the low part of f
ground connection is switched open, the field

signal controls a switch that connects the

COIL

signal is a 90% duty cycle signal switching

COIL

signal is high, the coil is connected from

COIL

to ground and a charged magnetic field is

BATTERY

COIL

, the

collapses and the energy in the inductor is forced
to flow toward the lamp. f
charge pulses (see figure 2 on page 11) lamp, each

will send 32 of these

COIL

pulse increases the voltage drop across the lamp in
discrete steps. As the voltage potential approaches
its maximum, the steps become smaller (see figure
1 on page 11).

The H-bridge consists of two SCR structures that
act as high voltage switches. These two switches
control the polarity of how the lamp is charged.
The SCR switches are controlled by the f
signal which is the oscillator frequency divided
by 64. For a 25.6kHz oscillator, f

LAMP

LAMP

=400Hz.

When the energy from the coil is released, a high
voltage spike is created triggering the SCR
switches. The direction of current flow is
determined by which SCR is enabled. One full
cycle of the H-bridge will create a voltage step
from ground to 80V (typical) on pins 5 and 6 which
are 180 degrees out of phase with each other
(see figure 3 on page 11). A differential view of
the outputs is shown in figure 4 on page 11.

Layout Considerations

The SP4425 circuit board layout must observe
careful analog precautions. For applications with
noisy power supply voltages, a 0.1µF low ESR
decoupling capacitor must be connected from Vdd
to ground. Any high voltage traces should be
isolated from any digital clock traces or enable
lines. A solid ground plane connection is strongly
recommended. All traces to the coil or to the high
voltage outputs should be kept as short as possible
to minimize capacitive coupling to digital clock
lines and to reduce EMI emissions.

Integrator Capacitor

An integrating capacitor must be placed from pin
4 (D1) to ground in order to minimize glitches
associated with switching the coil. A capacitor at
this point will collect the high voltage spikes and
will maximize the peak to peak voltage output.
High resistance EL lamps will produce more
pronounced spiking on the EL output waveform;
adding the C
and increase the voltage output at each coil step.

capacitor will minimize the peaking

INT

The value of the integrator capacitor is application
specific typical values can range from 500pF to

0.1µF. No integrator capacitor or very small values
(500pF) will have a minor effect on the output,
whereas a 0.1µF capacitor will cause the output to
charge and discharge rapidly creating a square
wave output. For most applications an 1800pF
integrator capacitor is suitable.

SP4425DS/20 SP4425 Electroluminescent Lamp Driver © Copyright 2000 Sipex Corporation

5

Electroluminescent Technology

What is electroluminescence?

An EL lamp is basically a strip of plastic that is
coated with a phosphorous material which emits
light (fluoresces) when a high voltage (>40V)
which was first applied across it, is removed or
reversed. Long periods of DC voltages applied to
the material tend to breakdown the material and
reduce its lifetime. With these considerations in
mind, the ideal signal to drive an EL lamp is a high
voltage sine wave. Traditional approaches to
achieving this type of waveform included discrete
circuits incorporating a transformer, transistors,
and several resistors and capacitors. This approach
is large and bulky, and cannot be implemented in
most hand held equipment. Sipex now offers low
power single chip driver circuits specifically
designed to drive small to medium sized
electroluminescent panels if all that is required is
one external inductor fast recovery diode and two
capacitors.

Electroluminescent backlighting is ideal when used
with LCD displays, keypads, or other backlit
readouts. Its main use is to illuminate displays in
dim to dark conditions for momentary periods of
time. EL lamps typically consume less than LEDs
or bulbs making them ideal for battery powered
products. Also, EL lamps are able to evenly light
an area without creating "hot spots" in the display.

The amount of light emitted is a function of the
voltage applied to the lamp, the frequency at which
it is applied, the lamp material used and its size,
and lastly, the inductor used. Both voltage and
frequency are directly related to light output. In
other words as the voltage or the frequency of the
EL output is increased the light output will also
increase. The voltage has a much larger impact on
light output than the frequency does. For example,
an output signal of 168VPP with a frequency of
500Hz can yield 15Cd/m2, in the same application
a different EL driver could produce 170VPP with a
frequency of 450Hz and can also yield 15Cd/m2.
Variations in peak to peak voltage and variations
in lamp frequency are to be expected, light output
will also vary from device to device however
typical light output variations are usually not
visually noticeable.

There are many variables which can be optimized
for specific applications. Sipex supplies
characterization charts to aid the designer in
selecting the optimum circuit configuration
(see page 7 and 8).

SP4425DS/20 SP4425 Electroluminescent Lamp Driver © Copyright 2000 Sipex Corporation

6

Pager Application

=180pF

C

=1.5V

V

IN

470µH/4Ω

NOTE:
Keep coil as close to
SP4425 as possible

IN4148

OSC

+

–

C

INT

Typical SP4425 Application Circuit

=180pF

C

=+1.5V

V

IN

470µH/4Ω

NOTE:
Keep coil as close to
SP4425 as possible

IN4148

OSC

=1800pF SP4425

C

INT

C

OSC

V

SS

Coil

D1

=1800pF SP4425

C

OSC

V

SS

Coil

D1

HON

V

DD

EL1

EL2

HON

V

DD

EL1

EL2

NOTE:
Keep high voltage traces
short and away from V
and clock lines

HON=VDD=ON
HON=0V=OFF

0.1µF Low ESR
Decoupling
Capacitor

1.5 sq.in.
4nF

NOTE:
Keep high voltage traces
short and away from V
and clock lines

HON=VDD=ON
HON=0V=OFF

0.1µF Low ESR
Decoupling
Capacitor

EL Lamp 5Ftl

DD

100Ω

5Ftl

DD

8.2nF

SP4425 1.5V Test Circuit

HON=VDD=ON
HON=0V=OFF

=180pF

C

=3V

V

IN

2mH/44Ω

NOTE:
Keep coil as close to
SP4425 as possible

IN4148

OSC

+

–

C

OSC

V

SS

Coil

D1

C

= 470pF SP4425

int

HON

V

DD

EL1

EL2

0.1µF Low ESR
Decoupling
Capacitor

NOTE:
Keep high voltage traces
short and away from V
and clock lines

DD

100Ω

5Ftl

4nF

SP4425 3V Test Circuit

SP4425DS/20 SP4425 Electroluminescent Lamp Driver © Copyright 2000 Sipex Corporation

7

The following performance curves are intended to give the designer a relative scale from which to optimize
specific applications. Absolute measurements may vary depending upon the brand of components chosen.

V

Peak

LAMP

60
65

55

Peak (Volts)

LAMP

V

50

45
40

35
30

1 1.05

1.1 1.15 1.2 1.25 1.3 1.35 1.4 1.45 1.5

(Volts)

V

DD

Inductors

µH/DCR

A 470/4
B 470/11
C 470/4
D 470/2.3
E 470/3.4

Lamp = 1.5 sq. in., C1 = 0.1µF, C2 = 180pF, D1 = D1N4148

I

TOTAL

50
45

40
35

(Volts)

TOTAL

I

30
25

20

1

1.1

1.2

1.3 1.4

1.5

VDD (Volts)

Inductors

µH/DCR

A 470/4
B 470/11
C 470/4
D 470/2.3
E 470/3.4

Lamp = 1.5 sq. in., C1 = 0.1µF, C2 = 180pF, D1 = D1N4148

SP4425DS/20 SP4425 Electroluminescent Lamp Driver © Copyright 2000 Sipex Corporation

8

The following performance curves are intended to give the designer a relative scale from which to optimize
specific applications. Absolute measurements may vary depending upon the brand of components chosen.

Light Output

5

4.5
4

3.5
3

2.5

2

Inductors

µH/DCR

1.5

1

Light Output (FtL)

0.5
0

1

1.1

1.2

V

(Volts)

DD

1.3 1.4

1.5

A 470/4
B 470/11
C 470/4
D 470/2.3
E 470/3.4

Lamp = 1.5 sq. in., C1 = 0.1µF, C2 = 180pF, D1 = D1N4148

380

360
340
320

300
280

260
240

220

Lamp Frequency (Hz)

200

1

1.1

1.2

V

DD

1.3 1.4

(Volts)

Lamp = 1.5 sq. in., C1 = 0.1µF, C2 = 180pF, D1 = D1N4148

Lamp Frequency

1.5

Inductors

µH/DCR

A 470/4
B 470/11
C 470/4
D 470/2.3
E 470/3.4

SP4425DS/20 SP4425 Electroluminescent Lamp Driver © Copyright 2000 Sipex Corporation

9

The following performance curves are intended to give the designer a relative scale from which to optimize
specific applications. Absolute measurements may vary depending upon the brand of components chosen.

SP4425 Total Supply Current vs. Temperature SP4425 Lamp Frequency vs. Temperature

40
35
30
25
20
15
10

Total Current (mA)

5
0

-40

0

Coil=470µH/4Ω; C
C

=1800pF; C

INT

LOAD

25

Temperature (OC)

=180pF;

OSC

=4.7nF

Peak-to-Peak Voltage vs. Temperature

200

150

100

Peak-to-Peak

Votage (Volts)

50

0

-40

0

Coil=470µH/4Ω; C

=1800pF; C

C

INT

Temperature (

=180pF;

OSC

=4.7nF

LOAD

25

1.5V

1.1V

70

70

O

C)

85

1.5V

1.1V

85

700

600
500
400

300
200

Lamp Frequency (Hz)

100

0

-40

0

Coil=470µH/4Ω; C
C

=1800pF; C

INT

Lamp Frequency vs. Temperature

800

700

600

500

400

300

200

Lamp Frequency (Hz)

100

0

-40

0

Coil=2mH/44Ω; C
C

=470pF; C

INT

LOAD

25

Temperature (

=180pF;

OSC

=4.7nF

LOAD

25

Temperature (

=180pF;

OSC

=4nF

70

O

C)

70

O

C)

85

85

1.5V

1.1V

3.0V

2.2V

Light Output vs. Temperature

25
20

15
10

5

Light Output (cd/m2)

0

-40

0

Coil=2mH/44Ω; C
C

=470pF; VDD=3.0V; Load=3 sq.in.

INT

25

Temperature (

=180pF;

OSC

70

O

C)

85

Coil=2mH/44Ω; C
C

Total ICC @3VDD vs. Temperature

40

35
30
25

20
15
10

Total Current (mA)

5
0

-40

0

Temperature (

=180pF;

=470pF; C

INT

LOAD

OSC

=4nF

25

70

O

C)

85

SP4425 Peak-to-Peak Voltage vs. Temperature

250

200
150
100

Peak-to-Peak

Votage (Volts)

50

0

0

-40

0

Coil=2mH/44Ω; C

=470pF; C

C

INT

SP4425DS/20 SP4425 Electroluminescent Lamp Driver © Copyright 2000 Sipex Corporation

LOAD

25

Temperature (

=180pF;

OSC

=4nF

70

O

C)

3.0V

2.2V

85

10

V =80V (typical)

PEAK

EL1 output; 32 charge steps per half cycle

Figure 1. EL output voltage in discrete steps at EL1 output

32 coil pulses per half cycle; 94% duty cycle.

Figure 2. Voltage pulses released from the coil to the EL driver circuitry

EL1 Output

-EL2 Output

Figure 3. EL voltage waveforms from the EL1 and EL2 outputs

EL1 Output

-EL2 Output

Differential representation (EL1-EL2)

V = 160V

PP

(typical)

Figure 4. El differential output waveform of the EL1 and EL2 outputs

SP4425DS/20 SP4425 Electroluminescent Lamp Driver © Copyright 2000 Sipex Corporation

11

The coil part numbers presented in this data sheet have been qualified as being suitable for the SP4425 product.
Contact Sipex for applications assistance in choosing coil values not listed in this data sheet.

Coil Manufacturers New Coils

4.5 ±

.155

Dia

.115

Max

Coilcraft USA

Ph: [phone]
Fax: [phone]

Coilcraft Europe

Ph: 44 01236 730595
Fax: [phone]

muRata USA

Ph: [phone]
Fax: [phone]

muRata Europe

Ph: 011-4991166870
Fax: [phone]

KOA Speer Electronics, Inc.

Ph: 814-362-5536
Fax: [phone]

Part No. LPC4045TE471K
470µH, 4.55 ohm

Coilcraft Taiwan

Ph: 886/2/264-3646
Fax: [phone]

Coil Craft Singapore

Ph: 65 296-6933
Fax: [phone] #382

muRata Taiwan Electronics

Ph: 011 88642914151
Fax: [phone]

muRata Electronics
Singapore

Ph: 011 657584233
Fax: [phone]

Coilcraft Hong Kong

Ph: 852 770-9428
Fax: [phone]

Part No. DO1608C-474
470µH, 3.60 ohm

muRata Hong Kong

Ph: 011-85223763898
Fax: [phone]

Part No. LQN4N471K04
470µH, 11.5 ohm

.260

6.60

.175

Max

(All Dimensions in mm)

4.7 ±0.3

5.7 ±0.3

(All Dimensions in mm)

4.5 Max

(All Dimensions in mm)

Max

5.0 ±0.35.0 ±0.3

4.0 ± 0.2

Sumida Electric Co., LTD.
USA

Ph: [phone]
Fax: [phone]

Sumida Electric Co., LTD.
Japan

Ph: 03-3607-5111
Fax: [phone]

Toko America Inc. USA

Ph: [phone]
Fax: [phone]

Toko Inc. Europe

Ph: [phone]
Fax: [phone]

EL polarizers/transflector
manufacturers

Nitto Denko
San Jose, CA
Phone: [phone]

Astra Products
Baldwin, NJ
Phone: [phone]
Fax: [phone]

SP4425DS/20 SP4425 Electroluminescent Lamp Driver © Copyright 2000 Sipex Corporation

Sumida Electric Co., LTD.
Singapore

Ph: 2963388
Fax: [phone]

Sumida Electric Co., LTD.
Hong Kong

Ph: 28806688
Fax: [phone]

Toko Inc. Japan

Ph: 03 3727 1161
Fax: [phone]

Toko Inc. Singapore

Ph: (255) 4000
Fax: [phone]

7.3 ±0.2

Part No. CDRH74-471MC
470µH, 3.01 ohm

Toko Inc. Hong Kong

Ph: 2342-8131
Fax: [phone]

Part No. 667MA471N
470µH, 1.90 ohm

4.4 Max

(All Dimensions in mm)

EL Lamp manufacturers

Metro Mark/Leading Edge
Minnetonka, MN
Phone: [phone]
Fax: [phone]

Midori Mark Ltd.
1-5 Komagata 2-Chome
Taita-Ku 111-0043 Japan
Phone: [phone]

Luminescent Systems Inc. (LSI)
4 Lucent Drive
Lebanon, NH 03766
Phone: [phone]
Fax: [phone]

7.3

4.5

Max

4.4 Max

2.75 Max

(All Dimensions in mm)

NEC Corporation
Tokyo, Japan
Phone: [phone]
Fax: [phone]

Seiko Precision
Chiba, Japan
Phone: [phone]
Fax: [phone]

Gunze Electronics
2113 Wells Branch Parkway
Austin, TX 78728
Phone: [phone]
Fax: [phone]

12

SP4425CN

1

8-pin NSOIC

0.228/0.2440.150/0.157

0.014/0.019

All package dimensions in inches

0.189/0.197

0.053/0.069

0.050 BSC

0.020

0.0965
±0.003

0.020

SP4425CU

1

8-pin µSOIC

0.0256
BSC

0.118

±0.002

2

0.012

±0.003

0.016

±0.003

R .003

12.0˚
±4˚

0.01

12.0˚
±4˚

0.037
Ref

0.008

0.0215
±0.006

0˚ - 6˚

±0.006

0.006

0.006

±0.006

3.0˚
±3˚

0.013
±0.005

0.116

±0.004

0.118

±0.002

0.004

±0.002

0.034

±0.002

0.040

±0.002

0.116

±0.004

0.118

±0.004

95 SP4425CN per tube, no minimum quantity 50 SP4425CU per tube

P

W

NSOIC-8 13" reels: P=8mm, W=12mm
µSOIC-8 13" reels: P=8mm, W=12mm

Pkg. Minimum qty per reel Standard qty per reel Maximum qty per reel

CN 500 2500 3000
CU 500 2500 3000

SP4425DS/20 SP4425 Electroluminescent Lamp Driver © Copyright 2000 Sipex Corporation

13

ORDERING INFORMATION

Model Operating Temperature Range Package Type

SP4425CN . ............................................ -40˚C to +85˚C .........................................8-Pin NSOIC

SP4425CU . ............................................ -40˚C to +85˚C ......................................... 8-Pin µSOIC

SP4425CX ..............................................-40˚C to +85˚C ........................................................ Die

SP4425NEB .....................................................N/A ............................... NSOIC Evaluation Board

SP4425UEB .....................................................N/A ............................... µSOIC Evaluation Board

Please consult the factory for pricing and availability on a Tape-On-Reel option.

Corporation

SIGNAL PROCESSING EXCELLENCE

Sipex Corporation
Headquarters and

Sales Office

22 Linnell Circle
Billerica, MA 01821
TEL: [phone]
FAX: [phone]
e-mail: [e-mail]

Sales Office

233 South Hillview Drive
Milpitas, CA 95035
TEL: [phone]
FAX: [phone]

Sipex Corporation reserves the right to make changes to any products described herein. Sipex does not assume any liability arising out of the
application or use of any product or circuit described hereing; neither does it convey any license under its patent rights nor the rights of others.

SP4425DS/20 SP4425 Electroluminescent Lamp Driver © Copyright 2000 Sipex Corporation

14