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SP4405EN

Description
Low Voltage Electroluminescent Lamp Driver with Regulated Output Voltage
CategoryAnalog mixed-signal IC    Drivers and interfaces   
File Size165KB,20 Pages
ManufacturerSIPEX
Websitehttp://www.sipex.com/
Download Datasheet Parametric Compare View All

SP4405EN Overview

Low Voltage Electroluminescent Lamp Driver with Regulated Output Voltage

SP4405EN Parametric

Parameter NameAttribute value
Is it Rohs certified?incompatible
MakerSIPEX
package instructionNSOIC-8
Reach Compliance Codeunknow
Interface integrated circuit typeEL DISPLAY DRIVER
JESD-30 codeR-PDSO-G8
length4.9 mm
Humidity sensitivity level1
Multiplex display functionNO
Number of functions1
Number of segments1
Number of terminals8
Maximum operating temperature85 °C
Minimum operating temperature-40 °C
Package body materialPLASTIC/EPOXY
encapsulated codeSOP
Package shapeRECTANGULAR
Package formSMALL OUTLINE
Certification statusNot Qualified
Maximum seat height1.75 mm
Maximum supply voltage4.5 V
Minimum supply voltage2.2 V
Nominal supply voltage3 V
surface mountYES
technologyBICMOS
Temperature levelINDUSTRIAL
Terminal formGULL WING
Terminal pitch1.27 mm
Terminal locationDUAL
width3.9 mm
®
SP4405
Low Voltage Electroluminescent Lamp Driver
with Regulated Output Voltage
s
+2.2V to +4.5V Battery Operation
s
DC-to-AC Converter Produces
160V
PP
typical for EL Display Panels
s
Single Resistor Controlled Internal
Oscillator
s
Low Current Standby Mode
s
Internal Feedback Loop Maintains
a Constant Regulated EL Lamp
Voltage Output
APPLICATIONS
s
Pagers
s
Cellular Phones
s
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 160V
PP
(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
ELEN 1
V
SS
2
COIL 3
EL1 4
SP4405
8 R
OSC
7 C
INT
6
5
V
DD
EL2
C1
0.1µF
ELEN
1
L1
470µH
SP4405
V
DD
R
OSC
450kΩ
6
3
COIL
*D1
1N4148
R
OSC
8
7
C
INT
C2
1nF
2
V
SS
4
EL1
5
EL2
C
INT
0.1µF
EL Lamp
*optional device
SP4405DS/18
SP4405 Low Voltage Electroluminescent Lamp Driver
© Copyright 2000 Sipex Corporation
1

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