Datasheet SP4405EN, SP4405EU, SP4405NEB, SP4405UEB Datasheet (Sipex Corporation)

®

SP4405

Low Voltage Electroluminescent Lamp Driver

with Regulated Output Voltage

■ +2.2V to +4.5V Battery Operation

■ DC-to-AC Converter Produces

160VPP typical for EL Display Panels

■ Single Resistor Controlled Internal
Oscillator

■ Low Current Standby Mode

■ Internal Feedback Loop Maintains

a Constant Regulated EL Lamp
Voltage Output

APPLICATIONS

■ Pagers

■ Cellular Phones

■ PDAs

DESCRIPTION

The SP4405 is a high voltage output DC-AC inverter specifically designed to drive
electroluminescent lamps to backlight liquid crystal displays, keypads, and backlit readouts
used in battery operated portable equipment. The SP4405 will operate from a +2.2V to +4.5V
battery source. The device features an internal feedback loop that regulates the lamp voltage
output to 160VPP (typical) with varying supply voltages to maintain constant EL lamp brightness
over the life of the battery. The device also has a low power shutdown mode which draws less
than 50nA (typical), ideal for low power portable products. One external inductor is required
to generate the high voltage AC output. One external resistor is used to set the internal
oscillator frequency. The SP4405 is ideal for portable applications such as pagers, cellular
phones, PDAs, and other portable applications using LCDs in dim or low light environments.
The SP4405 is offered in 8-pin SOIC and 8-pin µSOIC packages.

V

BATTERY

1

SP4405

V

DD

6

OSC

R

OSC

8

C2

1nF

EL Lamp

2

V

SS

COIL

3

C

7

54

EL2EL1

INT

*optional device

L1

470µH

*D1

1N4148

C

INT

0.1µF

0.1µF

ELEN

R

450kΩ

C1

8

R

OSC

7

C

INT

6

V

DD

5

EL2

V

SS

EL1

1
2

3
4

SP4405

ELEN

COIL

SP4405DS/18 SP4405 Low Voltage Electroluminescent Lamp Driver © Copyright 2000 Sipex Corporation

1

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.

Power Supply, V

Input Voltages, ELEN (pin 1)....................................-0.5V to (VDD+0.5V)

Lamp Outputs...............................................................................200V

Operating Temperature...................................................-40˚C to +85˚C

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

Power Dissipation Per Package

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

.....................................................................7.0V

BATTERY

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

SPECIFICATIONS

V

= 3.0V, L = 470µH/3.9Ω, R

BATTERY

,tnerruCylppuSI

V,egatloVlioC

elcyCytuDlioC09%

V,egatloVylppuS

DD

I+

LIOC

LIOC

V,egatloVtupnINELE

I,tnerruCnwodtuhS

DS

EVIRDROTCUDNI

f,ycneuqerFlioC

LIOC

I,tnerruClioCkaeP

TUPTUOPMALLE

= 450KΩ, C

OSC

= 6.8nF, T

LAMP

= 25OC and C

AMB

RETEMARAP.NIM.PYT.XAMSTINUSNOITIDNOC

2.20.35.4V

DD

V

DD

NELE

ffoLE:WOL

noLE:HGIH

I=

I+

LIOC

DD

f=

821x6.84zHk

PMAL

LIOC-KP

f,ycneuqerFpmaLLE

PMAL

52.0-

V

DD

023083005

93
72

0

52.0-

V

DD

1.00.1

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

PP

rights are granted by implication or otherwise under any patent or
patent rights of Sipex Corporation.

= 0.1µF unless otherwise noted; refer to test circuit.

INT

55
07

5.4

V52.0

V

52.0+

DD

V

DD

Am

V

DD

V

V

µA

V

DD

V0.3=
V5.4=

V5.4=

06Am.ngisedybdeetnarauG

zH

egatloVtuptuOkaePotkaeP021

051

061091

002

V

PP

DD

V

DD

V

V0.3=
V5.4=

SP4405DS/18 SP4405 Low Voltage Electroluminescent Lamp Driver © Copyright 2000 Sipex Corporation

2

TEST CIRCUIT

V

BATTERY

Pin 3 — COIL — Coil. The inductor for the

EL lamp is connected from V

BATTERY

to this

input pin.

1

SP4405

V

DD

6

R

OSC

8

C2

1nF

2

4

V

SS

50Ω 50Ω

EL Lamp

6.8nF

1MΩ

COIL

3

C

7

5

EL2EL1

L1

470µH

D1

1N4148

INT

INT

C

0.1µF

C1

0.1µF

ELEN

R

750kΩ

OSC

PIN ASSIGNMENTS

Pin 1 — ELEN — Eluminescent Lamp Enable.

When driven HIGH, this input pin enables
the EL driver output EL1 and EL2 (pins 4 and
5, respectively) to the EL lamp.

Pin 4 — EL1 — Eluminescent Lamp. This is

a lamp driver output pin to connect to the
EL lamp.

Pin 5 — EL2 — Eluminescent Lamp. This is

a lamp driver output pin to connect to the
EL lamp.

Pin 6 — VDD — Positive Battery Power Supply.

Connect such that +2.2V < V

Pin 7 — C

— Integrating Capacitor.

INT

< +4.5V.

DD

Connecting a fast recovery diode from
COIL (pin 3) to this input pin increases
the light output of the EL lamp. An
integrating capacitor (0.1µF) connected
from this pin to ground filters out any coil
switching spikes or ripple present in the
output waveform to the EL lamp.

Pin 8 — R

— Oscillator Resistor. Connecting

OSC

a 450kΩ resistor to this input pin sets the
frequency of the internal clock.

Pin 2 — VSS — Power Supply Common.

Connect to the lowest circuit potential,
typically ground.

PINOUT

8

R

OSC

7

C

INT

6

V

DD

5

EL2

V

SS

1
2

3
4

SP4405

ELEN

COIL

EL1

SP4405DS/18 SP4405 Low Voltage Electroluminescent Lamp Driver © Copyright 2000 Sipex Corporation

3

DESCRIPTION

The SP4405 Electroluminescent Lamp Driver
is a low-cost low voltage device ideal for the
replacement of LED backlighting designs in
keypads, handsets, PDAs and other portable
designs. The SP4405 contains a DC-AC inverter
that can produce an AC output of 160VPP (typical)
from a +2.2V to +4.5V input voltage. An
internal feedback loop regulates the lamp voltage
output to 160VPP (typical) with varying supply
voltages to maintain constant EL lamp
brightness. An internal block diagram of the
SP4405 can be found in Figure 1.

The SP4405 is built on Sipex's dielectrically
isolated BiCMOS process that provides the
isolation required to separate the high voltage
AC signal used to drive the EL lamp from the
low voltage logic and signal processing circuitry.

V

=1.25V

REF

ERROR

COMPARATOR

OSC

R

OSC

450kΩ

V

DD

6

R

OSC

8

This ensures latch-up free operation in the
interface between the low voltage CMOS
circuitry and the high voltage bipolar circuitry.

A total of only six external components are
required for the standard operation of the
SP4405: an inductor, a fast recovery diode,
three capacitors and a resistor. A diagram of the
SP4405 in a typical application can be found in
Figure 2.

Electroluminescent Technology

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

V

BATTERY

SP4405

f

COIL

SCR1

SCR2

3

COIL

7

C

INT

L2

470µH, 3Ω

D1

*

1N4148

C

**

INT

0.1µF

C

C

0.1µF

1

1nF

2

Q

FF7

Q

2

V

SS

1

ELEN

f

f

LAMP

LAMP

45

EL1

EL2

EL Lamp

NOTES: * Optional Component

** C

may be decreased to change the square wave output to a sawtooth waveform.

INT

Figure 1. Internal Diagram of the SP4405

SP4405DS/18 SP4405 Low Voltage Electroluminescent Lamp Driver © Copyright 2000 Sipex Corporation

4

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 can be
difficult to implement in some smaller hand
held equipment. Sipex now offers low power
single chip driver circuits specifically
designed to drive small to medium sized
electroluminescent panels.

Market Applications

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 power
than LEDs or incandescent bulbs making them
ideal for battery powered products. Also,
EL lamps are able to evenly light an area
without creating any undesirable "hot spots" in
the display.

THEORY OF OPERATION

The SP4405 is a DC-AC inverter made up of:

1. The Oscillator/Frequency Divider, 2. The
Coil, and 3. The Switched H-bridge Network.
Further details of each element follow.

The Oscillator/Frequency Divider

The oscillator provides the SP4405 with an
on-chip clock used to control the coil switch
(f

) and the H-bridge network (f

COIL

Although the oscillator frequency can be varied
to optimize the lamp output, the ratio of f
f

will always equal 128.

LAMP

LAMP

and f

LAMP

COIL

Figure 1 shows the oscillator output driving the
coil and the output of the oscillator with 7 flip
flops driving the lamp. The suggested oscillator
frequency is 48.6kHz (R
The oscillator output is internally divided down

= 450kΩ) for f

OSC

COIL

by 7 flip flops to create a second internal control
signal at 380Hz for f

LAMP

.

V

BATTERY

1

SP4405

V

DD

6

R

OSC

8

C2

EL Lamp

2

V

SS

54

EL2EL1

C1

0.1µF

ELEN

R

450kΩ

OSC

1nF

Figure 2. Typical Application Circuit for the SP4405, Set
for a Square Wave Output with C

= 0.1µF

INT

The Coil

The supply V
+4.5V. V
does not exceed the maximum coil current

BATTERY

can range from +2.2V to

BATTERY

should be chosen such that I

specification. The majority of the current goes
through the coil and is typically much greater
than IDD.

The coil is an external component connected
from V
stored in the coil according to the equation
EL=1/2LI
is the product IP = (tON) (V
where tON is the time it takes for the coil to reach

).

its peak current, VCE is the voltage drop across
the internal NPN transistor for f

/

inductance of the coil. When the NPN transistor

to pin 3 of the SP4405. Energy is

BATTERY

2

where IP, to the first approximation,

P

BATTERY

switch is off, the energy is forced through an
internal diode which drives the switched
H-bridge network. This energy recovery is
directly related to the brightness of the EL lamp
output. There are many variations among coils;

.

magnetic material differences, winding
differences and parasitic capacitances.
For suggested coil suppliers, refer to Page 7.

The f
the end of the coil at pin 3 to ground or to open
circuit. The f
signal switching at the oscillator frequency,

signal controls a switch that connects

COIL

signal is a 90% duty cycle

COIL

COIL

3

C

INT

7

*optional device

- VCE)/L),

, and L is the

COIL

L1

470µH

*D1

1N4148

C

INT

0.1µF

COIL

SP4405DS/18 SP4405 Low Voltage Electroluminescent Lamp Driver © Copyright 2000 Sipex Corporation

5

35kHz. During the time when the f
HIGH, the coil is connected from V
ground and a charged magnetic field is created
in the coil. When the f
ground connection is switched open, the field

signal is LOW, the

COIL

COIL

BATTERY

signal is

to

collapses, and the energy in the inductor is
forced to flow toward the high voltage H-bridge
switches. f
pulses (see Figure 4) to the lamp. Each pulse

will send an array of charge

COIL

increases the voltage drop across the lamp in
discrete steps. As the voltage potential
approaches its maximum, the steps become
smaller (see Figure 3).

The Switched H-Bridge Network

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
divided by 128. For a 48.6kHz oscillator, the
7 flip flops will drive f

signal which is the oscillator frequency

LAMP

= 380Hz.

LAMP

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 64 voltage
steps from ground to 80V (typical) on EL1 and
EL2 (pins 4 and 5, respectively) which are 180
degrees out of phase (see Figure 5). A differential
representation of the output is shown in Figure 6.

The feedback loop connects the H-bridge
network to the error comparator through an
internal resistor network. When the error
comparator senses a lamp voltage below
regulation (< 80VP typical), the error comparator
enables the oscillator to perform step-up
conversions to the lamp output. When the error
comparator senses lamp voltages above
regulation (> 80VP typical), it disables the
oscillator minimizing power consumption until
the lamp voltage drops below regulation. With
a varying supply voltage, the EL lamp brightness
will appear constant as a direct result of this
regulated output voltage.

Fine Tuning Performance

Circuit performance of the SP4405 can be
improved with some of the following
suggestions:

Increase EL Lamp Light Output: By
connecting a fast recovery diode from COIL
(pin 3) to C
switched H-bridge network is bypassed resulting

(pin 7), the internal diode of the

INT

in an increase in light output at the EL lamp. We
suggest a fast recovery diode, such as the industry
standard 1N4148, be used for D1. This circuit
connection can be found in Figure 2.

Changing the EL Lamp Output Voltage
Waveform: Designers can alter the sawtooth

output voltage waveform to the EL Lamp.
Increasing the capacitance of the integration
capacitor C
waveform making it appear more like a square

will integrate the sawtooth

INT

wave.

Printed Circuit Board Layout Suggestions:

The SP4405's high-frequency operation makes
PC layout important for minimizing ground
bounce and noise. Keep the IC's GND pin and
the ground leads of C1 and C
than 0.2in (5mm) apart. Also keep the

in Figure 2 less

INT

connections to COIL (pin 3) as short as possible.
To maximize output power and efficiency and
minimize output ripple voltage, use a ground
plane and solder the IC's V
the ground plane.

(pin 2) directly to

SS

EL Lamp Driver Design Challenges

There are many variables which can be optimized
for specific applications. The amount of light
emitted is a function of the voltage applied to the
lamp by the inductor, the frequency at which it
is applied, the lamp material and the lamp size.
Sipex supplies characterization charts to aid the
designer in selecting the optimum circuit
configuration (see Figures 7 to 25).

Sipex will perform customer application
evaluations, using the customer's actual EL
lamp to determine the optimum operating
conditions for specific applications. For
customers considering an EL backlighting
solution for the first time, Sipex is able to offer
retrofitted solutions to the customer's existing
LED or non-backlit product for a thorough
electrical and cosmetic evaluation. Please
contact your local Sales Representative for
Sipex or the Sipex factory directly to initiate
this valued service.

SP4405DS/18 SP4405 Low Voltage Electroluminescent Lamp Driver © Copyright 2000 Sipex Corporation

6

Coil Manufacturers

Hitachi Metals
Material Trading Division
2101 S. Arlington Heights Road,
Suite 116
Arlington Heights, IL 60005-4142
Phone: [phone] Ext. 12
[phone] Ext. 12
Fax: [phone]

Hitachi Metals Ltd. Europe
Immernannstrasse 14-16, 40210
Dusseldorf, Germany
Contact: Gary Loos
Phone: [phone]
Fax: [phone]

Hitachi Metals Ltd.
Kishimoto Bldg. 2-1, Marunouchi
2-chome, Chiyoda-Ku, Tokyo, Japan
Contact: Mr. Noboru Abe
Phone: [phone]
Fax: [phone]

Hitachi Metals Ltd. Singapore
78 Shenton Way #12-01,
Singapore 079120
Contact: Mr. Stan Kaiko
Phone: [phone]
Fax: [phone]

Hitachi Metals Ltd. Hong Kong
Room 1107, 11/F., West Wing,
Tsim Sha. Tsui Center 66
Mody Road, Tsimshatsui East,
Kowloon, Hong Kong
Phone: [phone]
Fax: [phone]

Toko America Inc.
1250 Feehanville Drive
Mt. Prospect, IL, 60056 U.S.A.
Phone: [phone]
Fax: [phone]

Toko Inc. Europe
Burgmullerstr. 7, D-40235
Dusseldorf 1, FR Germany
Phone: [phone]
Fax: [phone]

Toko Inc. Japan
1-17, Higashi-Yukigaya
2-chome, Ohta-ku,
Tokyo 145 Japan
Phone: [phone]
Fax: [phone]

Toko Inc. Singapore
No. 1 Lorong 2. Toa Pavoh.
#03-00, Singapore, 319637
Phone: [phone]
Fax: [phone]

Toko Inc. Hong Kong
45 Hoi Yuen Road, Yau Lee
Centre, 7th, 8th, & 9th Fl.,
Kwun-Tong Kowloon,
Hong Kong
Phone: [phone]
Fax: [phone]

Sumida Electric Co., LTD.
5999, New Wilke Road,
Suite #110
Rolling Meadows, IL, 60008 U.S.A.
Phone: [phone]
Fax: [phone]

Sumida Electric Co., LTD.
4-8, Kanamachi 2-Chrome,
Katsushika-ku, Tokyo 125 Japan
Phone: [phone]
Fax: [phone]

Sumida Electric Co., LTD.
Block 15, 996, Bendemeer Road
#04-05 to 06, Singapore 339944
Republic of Singapore
Phone: [phone]
Fax: [phone]

Sumida Electric Co., LTD.
14 Floor, Eastern Center, 1065
King's Road, Quarry Bay,
Hong Kong
Phone: [phone]
Fax: [phone]

Murata
2200 Lake Park Drive, Smyrna
Georgia 30080 U.S.A.
Phone: [phone]
Fax: [phone]

Murata European
Holbeinstrasse 21-23, 90441
Numberg, Postfachanschrift 90015
Phone: [phone]
Fax: [phone]

Murata Taiwan Electronics
225 Chung-Chin Road, Taichung,
Taiwan, R.O.C.
Phone: [phone]
Fax: [phone]

Murata Electronics Singapore
200 Yishun Ave. 7, Singapore
2776, Republic of Singapore
Phone: [phone]
Fax: [phone]

Murata Hong Kong
Room 709-712 Miramar Tower, 1
Kimberly Road, Tsimshatsui,
Kowloon, Hong Kong
Phone: [phone]
Fax: [phone]

Polarizers/transflector Mnfg.

Nitto Denko
Yoshi Shinozuka
Bayside Business Park 48500
Fremont, CA. 94538
Phone: [phone]
Fax: [phone]

Top Polarizer- NPF F1205DU
Bottom - NPF F4225
or (F4205) P3 w/transflector

Transflector Material
Astra Products
Mark Bogin
P.O. Box 479
Baldwin, NJ 11510
Phone [phone]
Fax [phone]

SP4405DS/18 SP4405 Low Voltage Electroluminescent Lamp Driver © Copyright 2000 Sipex Corporation

EL Lamp manufacturers

Leading Edge Ind. Inc.
11578 Encore Circle
Minnetonka, MN 55343
Phone [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]

NEC Corporation
Yumi Saskai
7-1, Shiba 5 Chome, Minato-ku,
Tokyo 108-01, Japan
Phone: [phone]
Fax: [phone]

Seiko Precision
Shuzo Abe
1-1, Taihei 4-Chome,
Sumida-ku, Tokyo, 139 Japan
Phone: [phone]
Fax: [phone]

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

7

V

= 80V (typ)

PEAK

EL1 output

Figure 3. EL Output Voltage in Discrete Steps at EL1 Output

128 coil pulses per half cycle; 90% duty cycle.

Figure 4. Voltage Pulses Released from the Coil to the EL Driver Circuitry

EL1 Output

EL2 Output

Figure 5. EL Voltage Waveforms from the EL1 and EL2 Outputs

EL1 Output

V

= 160V (typ)

P-P

EL2 Output

Differential Representation E

Figure 6. EL Differential Output Waveform of the EL1 and EL2 Outputs

SP4405DS/18 SP4405 Low Voltage Electroluminescent Lamp Driver © Copyright 2000 Sipex Corporation

12

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.

700
600
500
400
300

Frequency (Hz)

200
100

0

200 300

400

450

500

600

Resistor / kΩ

800 900 1.0K 1.1K 1.2K

700

Figure 7. Lamp Frequency vs R

250

200

150

100

Oscillator Frequency (kHz)

50

0

100 200 300 400 500 600 700 800 900 1000

OSC

Figure 8. Oscillator Frequency vs R

Oscillator Resistor

OSC

SP4405DS/18 SP4405 Low Voltage 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.

60

50

40

(mA)

30

TOTAL

I

20

10

Figure 9. I

Figure 10. I

TOTAL

0

200 300

vs R

OSC

400

with/without external diode

450

500

600

R

OSC

(kΩ)

800 900 1.0K 1.1K 1.2K

700

50
45
40
35
30
25

ICC (mA)

20
15
10

5
0

1.5 2 2.5 3 3.5 4 4.5 5

Lamp Size

vs Lamp Size

TOTAL

SP4405DS/18 SP4405 Low Voltage Electroluminescent Lamp Driver © Copyright 2000 Sipex Corporation

10

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.

180
160
140

120
100

80
60

Output V oltage (VPP)

40

20

0
100 200 300 400 500 600 700 800 900 1000

Oscillator Resistor (kΩ)

Figure 11. Output Voltage vs R

OSC

180
160
140
120
100

80
60

Output V oltage (V)

40
20

0

1.5 2 2.5 3 3.5 4 4.5 5

Lamp Size (sq.in.)

Figure 12. Output Voltage vs Lamp Size (Lamp Capacitance)

SP4405DS/18 SP4405 Low Voltage Electroluminescent Lamp Driver © Copyright 2000 Sipex Corporation

11

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.

25

20

)

2

15

10

Luminance (cd/m^

5

0
100 200 300 400 500 600 700 800 900 100

Oscillator Resistor (kΩ)

Figure 13. Luminance (cd/m2) vs R

7

6

5

4

3

Luminance (fL)

2

1

0
100 200 300 400 500 600 700 800 900 1000

Figure 14. Luminance (fL) vs R

OSC

OSC

Oscillator Resistor (kΩ)

SP4405DS/18 SP4405 Low Voltage Electroluminescent Lamp Driver © Copyright 2000 Sipex Corporation

12

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.

30

25

20

15

10

Luminance (cd/m^2)

5

0

1.5 2 2.5 3 3.5 4 4.5 5

Lamp Size (sq.in.)

Figure 15.

Figure 16.

8

7

6

5

4

3

Luminance (fL)

2

1

0

1.5 2 2.5 3 3.5 4 4.5 5

Lamp Size (sq.in.)

SP4405DS/18 SP4405 Low Voltage Electroluminescent Lamp Driver © Copyright 2000 Sipex Corporation

13

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.

500.00

450.00

400.00

350.00

250.00

(mV)

CE

200.00

V

150.00

100.00

50.00

0.00
5

20

10

15

30 35

25

Figure 17. VCE vs Coil Current

480
460
440
420
400
380

Frequency (Hz)

360
340
320
300

-40

-20

0

Figure 18. Frequency vs Temperature, VDD = 2.2V

40 45

50

55 60 65

I

COIL

(mA)

20

Temperature (oC)

40

80

70

85

75

60

100

90

95

80

SP4405DS/18 SP4405 Low Voltage Electroluminescent Lamp Driver © Copyright 2000 Sipex Corporation

14

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.

480
460
440
420
400
380

Frequency (Hz)

360
340
320
300

-40

-20

0

Figure 19. Frequency vs Temperature, VDD = 3.0V

480
460
440
420
400
380

Frequency (Hz)

360
340
320
300

-40

-20

0

Figure 20. Frequency vs Temperature, VDD = 5.0V

20

Temperature (oC)

20

Temperature (oC)

40

40

60

60

80

80

SP4405DS/18 SP4405 Low Voltage Electroluminescent Lamp Driver © Copyright 2000 Sipex Corporation

15

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.

90.0

80.0

70.0

60.0

Voltage (V)

50.0

40.0

30.0

-40

-20

0

Temperature (oC)

20

Figure 21. Peak EL Driver Voltage vs Temperature, VDD = 2.2V

90.0

80.0

70.0

60.0

Voltage (V)

50.0

40.0

30.0

-40

-20

0

Temperature (oC)

20

Figure 22. Peak EL Driver Voltage vs Temperature, VDD = 3.0V

40

40

60

60

80

80

SP4405DS/18 SP4405 Low Voltage Electroluminescent Lamp Driver © Copyright 2000 Sipex Corporation

16

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.

90.0

80.0

70.0

60.0

Voltage (V)

50.0

40.0

30.0

-40

-20

0

Temperature (oC)

20

40

60

Figure 23. Peak EL Driver Voltage vs Temperature, VDD = 5.0V

3.50

3.00

2.50

2.00

1.50

Current (mA)

1.00

0.50

0.00

-40

-20

0

20

40

60

Temperature (oC)

Figure 24. EL Driver Current Draw vs Temperature (not including Coil Current), VDD = 3.0V

80

80

SP4405DS/18 SP4405 Low Voltage Electroluminescent Lamp Driver © Copyright 2000 Sipex Corporation

17

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.

400.0

350.0

300.0

250.0

200.0

Current (nA)

150.0

100.0

50.0

0.0

-40

-20

0

Temperature (oC)

Figure 25. Leakage Current vs Temperature, VDD = 3.0V

20

40

60

80

SP4405DS/18 SP4405 Low Voltage Electroluminescent Lamp Driver © Copyright 2000 Sipex Corporation

18

All package dimensions in inches

8-pin NSOIC 8-pin µSOIC

0.189/0.197

SP4405EN

1

2

0.228/0.2440.150/0.157

0.014/0.019

0.050 BSC

0.053/0.069

0.0965
±0.003

2

0.020

0.020

0.0256
BSC

SP4405EU

1

2

0.116

±0.004

0.013
±0.005

0.118

±0.004

0.118

±0.004

0.004

±0.002

0.034

±0.004

0.040

±0.003

100 die per waffle pack

95 NSOIC devices per tube, no minimum quantity 50 µSOIC devices per tube

0.012

±0.003

0.16

±0.003

R .003

12.0˚

12.0˚
±4˚

0.008
0˚ - 6˚

0.006

±0.006

0.006

±0.006

0.0215

±4˚

±0.006

0.01

0.037
Ref

0.116

±0.004

0.118

±0.004

3.0˚
±3˚

P

W

8-pin NSOIC 13” reels: P = 8mm, W = 12mm

8-pin µSOIC 13” reels: P = 8mm, W = 12mm

Pkg. min qty per reel std qty per reel max qty per reel
EN 500 2500 3000

EU 500 2500 3000

SP4405DS/18 SP4405 Low Voltage Electroluminescent Lamp Driver © Copyright 2000 Sipex Corporation

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ORDERING INFORMATION

Model Temperature Range Package Type

SP4405EN . ............................................ -40˚C to +85˚C ......................................... 8-Pin NSOIC

SP4405EU . ............................................ -40˚C to +85˚C ......................................... 8-Pin µSOIC

SP4405NEB..................................................... N/A ........................................... Evaluation Board

SP4405UEB..................................................... N/A ........................................... 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 herein; neither does it convey any license under its patent rights nor the rights of others.

SP4405DS/18 SP4405 Low Voltage Electroluminescent Lamp Driver © Copyright 2000 Sipex Corporation

20